diff --git a/python/extensions/omci/__init__.py b/python/extensions/omci/__init__.py
new file mode 100644
index 0000000..b0fb0b2
--- /dev/null
+++ b/python/extensions/omci/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/python/extensions/omci/database/__init__.py b/python/extensions/omci/database/__init__.py
new file mode 100644
index 0000000..b0fb0b2
--- /dev/null
+++ b/python/extensions/omci/database/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/python/extensions/omci/database/alarm_db_ext.py b/python/extensions/omci/database/alarm_db_ext.py
new file mode 100644
index 0000000..2af6923
--- /dev/null
+++ b/python/extensions/omci/database/alarm_db_ext.py
@@ -0,0 +1,698 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from mib_db_api import *
+from voltha.protos.omci_alarm_db_pb2 import AlarmInstanceData, AlarmClassData, \
+    AlarmDeviceData, AlarmAttributeData
+
+
+class AlarmDbExternal(MibDbApi):
+    """
+    A persistent external OpenOMCI Alarm Database
+    """
+    CURRENT_VERSION = 1                       # VOLTHA v1.3.0 release
+    ALARM_BITMAP_KEY = 'alarm_bit_map'
+
+    _TIME_FORMAT = '%Y%m%d-%H%M%S.%f'
+
+    # Paths from root proxy
+    ALARM_PATH = '/omci_alarms'
+    DEVICE_PATH = ALARM_PATH + '/{}'            # .format(device_id)
+
+    # Classes, Instances, and Attributes as lists from root proxy
+    CLASSES_PATH = DEVICE_PATH + '/classes'                                # .format(device_id)
+    INSTANCES_PATH = DEVICE_PATH + '/classes/{}/instances'                 # .format(device_id, class_id)
+    ATTRIBUTES_PATH = DEVICE_PATH + '/classes/{}/instances/{}/attributes'  # .format(device_id, class_id, instance_id)
+
+    # Single Class, Instance, and Attribute as objects from device proxy
+    CLASS_PATH = '/classes/{}'                                 # .format(class_id)
+    INSTANCE_PATH = '/classes/{}/instances/{}'                 # .format(class_id, instance_id)
+    ATTRIBUTE_PATH = '/classes/{}/instances/{}/attributes/{}'  # .format(class_id, instance_id
+                                                               #         attribute_name)
+
+    def __init__(self, omci_agent):
+        """
+        Class initializer
+        :param omci_agent: (OpenOMCIAgent) OpenOMCI Agent
+        """
+        super(AlarmDbExternal, self).__init__(omci_agent)
+        self._core = omci_agent.core
+
+    def start(self):
+        """
+        Start up/restore the database
+        """
+        self.log.debug('start')
+
+        if not self._started:
+            super(AlarmDbExternal, self).start()
+            root_proxy = self._core.get_proxy('/')
+
+            try:
+                base = root_proxy.get(AlarmDbExternal.ALARM_PATH)
+                self.log.info('db-exists', num_devices=len(base))
+
+            except Exception as e:
+                self.log.exception('start-failure', e=e)
+                raise
+
+    def stop(self):
+        """
+        Start up the database
+        """
+        self.log.debug('stop')
+
+        if self._started:
+            super(AlarmDbExternal, self).stop()
+            # TODO: Delete this method if nothing else is done except calling the base class
+
+    def _time_to_string(self, time):
+        return time.strftime(AlarmDbExternal._TIME_FORMAT) if time is not None else ''
+
+    def _string_to_time(self, time):
+        return datetime.strptime(time, AlarmDbExternal._TIME_FORMAT) if len(time) else None
+
+    def _attribute_to_string(self, value):
+        """
+        Convert an ME's attribute value to string representation
+
+        :param value: (long) Alarm bitmaps are always a Long
+        :return: (str) String representation of the value
+        """
+        return str(value)
+
+    def _string_to_attribute(self, str_value):
+        """
+        Convert an ME's attribute value-string to its Scapy decode equivalent
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param attr_name: (str) Attribute Name (see EntityClasses)
+        :param str_value: (str) Attribute Value in string form
+
+        :return: (various) String representation of the value
+        :raises KeyError: Device, Class ID, or Attribute does not exist
+        """
+        # Alarms are always a bitmap which is a long
+        return long(str_value) if len(str_value) else 0L
+
+    def add(self, device_id, overwrite=False):
+        """
+        Add a new ONU to database
+
+        :param device_id: (str) Device ID of ONU to add
+        :param overwrite: (bool) Overwrite existing entry if found.
+
+        :raises KeyError: If device already exists and 'overwrite' is False
+        """
+        self.log.debug('add-device', device_id=device_id, overwrite=overwrite)
+
+        now = datetime.utcnow()
+        found = False
+        root_proxy = self._core.get_proxy('/')
+
+        data = AlarmDeviceData(device_id=device_id,
+                               created=self._time_to_string(now),
+                               version=AlarmDbExternal.CURRENT_VERSION,
+                               last_alarm_sequence=0)
+        try:
+            dev_proxy = self._device_proxy(device_id)
+            found = True
+
+            if not overwrite:
+                # Device already exists
+                raise KeyError('Device with ID {} already exists in Alarm database'.
+                               format(device_id))
+
+            # Overwrite with new data
+            data = dev_proxy.get('/', depth=0)
+            self._root_proxy.update(AlarmDbExternal.DEVICE_PATH.format(device_id), data)
+            self._modified = now
+
+        except KeyError:
+            if found:
+                raise
+            # Did not exist, add it now
+            root_proxy.add(AlarmDbExternal.ALARM_PATH, data)
+            self._created = now
+            self._modified = now
+
+    def remove(self, device_id):
+        """
+        Remove an ONU from the database
+
+        :param device_id: (str) Device ID of ONU to remove from database
+        """
+        self.log.debug('remove-device', device_id=device_id)
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        try:
+            # self._root_proxy.get(AlarmDbExternal.DEVICE_PATH.format(device_id))
+            self._root_proxy.remove(AlarmDbExternal.DEVICE_PATH.format(device_id))
+            self._modified = datetime.utcnow()
+
+        except KeyError:
+            # Did not exists, which is not a failure
+            pass
+
+        except Exception as e:
+            self.log.exception('remove-exception', device_id=device_id, e=e)
+            raise
+
+    @property
+    def _root_proxy(self):
+        return self._core.get_proxy('/')
+
+    def _device_proxy(self, device_id):
+        """
+        Return a config proxy to the OMCI Alarm_DB leaf for a given device
+
+        :param device_id: (str) ONU Device ID
+        :return: (ConfigProxy) Configuration proxy rooted at OMCI Alarm DB
+        :raises KeyError: If the device does not exist in the database
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        return self._core.get_proxy(AlarmDbExternal.DEVICE_PATH.format(device_id))
+
+    def _class_proxy(self, device_id, class_id, create=False):
+        """
+        Get a config proxy to a specific managed entity class
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param create: (bool) If true, create default instance (and class)
+        :return: (ConfigProxy) Class configuration proxy
+
+        :raises DatabaseStateError: If database is not started
+        :raises KeyError: If Instance does not exist and 'create' is False
+        """
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        fmt = AlarmDbExternal.DEVICE_PATH + AlarmDbExternal.CLASS_PATH
+        path = fmt.format(device_id, class_id)
+
+        try:
+            return self._core.get_proxy(path)
+
+        except KeyError:
+            if not create:
+                self.log.error('class-proxy-does-not-exist', device_id=device_id,
+                               class_id=class_id)
+                raise
+
+        # Create class
+        data = AlarmClassData(class_id=class_id)
+        root_path = AlarmDbExternal.CLASSES_PATH.format(device_id)
+        self._root_proxy.add(root_path, data)
+
+        return self._core.get_proxy(path)
+
+    def _instance_proxy(self, device_id, class_id, instance_id, create=False):
+        """
+        Get a config proxy to a specific managed entity instance
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param instance_id: (int) Instance ID
+        :param create: (bool) If true, create default instance (and class)
+        :return: (ConfigProxy) Instance configuration proxy
+
+        :raises DatabaseStateError: If database is not started
+        :raises KeyError: If Instance does not exist and 'create' is False
+        """
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID is a string')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        if not 0 <= instance_id <= 0xFFFF:
+            raise ValueError('instance-id is 0..0xFFFF')
+
+        fmt = AlarmDbExternal.DEVICE_PATH + AlarmDbExternal.INSTANCE_PATH
+        path = fmt.format(device_id, class_id, instance_id)
+
+        try:
+            return self._core.get_proxy(path)
+
+        except KeyError:
+            if not create:
+                self.log.error('instance-proxy-does-not-exist', device_id=device_id,
+                               class_id=class_id, instance_id=instance_id)
+                raise
+
+        # Create instance, first make sure class exists
+        self._class_proxy(device_id, class_id, create=True)
+
+        now = self._time_to_string(datetime.utcnow())
+        data = AlarmInstanceData(instance_id=instance_id, created=now, modified=now)
+        root_path = AlarmDbExternal.INSTANCES_PATH.format(device_id, class_id)
+        self._root_proxy.add(root_path, data)
+
+        return self._core.get_proxy(path)
+
+    def save_last_sync_time(self, device_id, value):
+        """
+        Save the Last Sync time to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (DateTime) Value to save
+        """
+        self.log.debug('save-last-sync-time', device_id=device_id, time=str(value))
+
+        try:
+            if not isinstance(value, datetime):
+                raise TypeError('Expected a datetime object, got {}'.
+                                format(type(datetime)))
+
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+
+            now = datetime.utcnow()
+            data.last_sync_time = self._time_to_string(value)
+
+            # Update
+            self._root_proxy.update(AlarmDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('save-sync-time-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('save-last-sync-exception', device_id=device_id, e=e)
+            raise
+
+    def get_last_sync_time(self, device_id):
+        """
+        Get the Last Sync Time saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        self.log.debug('get-last-sync-time', device_id=device_id)
+
+        try:
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+            return self._string_to_time(data.last_sync_time)
+
+        except KeyError:
+            return None     # OMCI MIB_DB entry has not yet been created
+
+        except Exception as e:
+            self.log.exception('get-last-sync-time-exception', e=e)
+            raise
+
+    def save_alarm_last_sync(self, device_id, value):
+        """
+        Save the Last Alarm Sequence value to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (int) Value to save
+        """
+        self.log.debug('save-last-sync', device_id=device_id, seq=str(value))
+
+        try:
+            if not isinstance(value, int):
+                raise TypeError('Expected a integer, got {}'.format(type(value)))
+
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+
+            now = datetime.utcnow()
+            data.last_alarm_sequence = int(value)
+
+            # Update
+            self._root_proxy.update(AlarmDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('save-sequence-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('save-last-sync-exception', device_id=device_id, e=e)
+            raise
+
+    def get_alarm_last_sync(self, device_id):
+        """
+        Get the Last Sync Time saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        self.log.debug('get-last-sync', device_id=device_id)
+
+        try:
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+            return int(data.last_alarm_sequence)
+
+        except KeyError:
+            return None     # OMCI ALARM_DB entry has not yet been created
+
+        except Exception as e:
+            self.log.exception('get-last-alarm-exception', e=e)
+            raise
+
+    def _add_new_class(self, device_id, class_id, instance_id, attributes):
+        """
+        Create an entry for a new class in the external database
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+        """
+        self.log.debug('add', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+
+        now = self._time_to_string(datetime.utcnow())
+        attrs = [AlarmAttributeData(name=k,
+                                    value=self._attribute_to_string(v)) for k, v in attributes.items()]
+        class_data = AlarmClassData(class_id=class_id,
+                                    instances=[AlarmInstanceData(instance_id=instance_id,
+                                                                 created=now,
+                                                                 modified=now,
+                                                                 attributes=attrs)])
+
+        self._root_proxy.add(AlarmDbExternal.CLASSES_PATH.format(device_id), class_data)
+        self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+                       entity_id=instance_id, attributes=attributes)
+        return True
+
+    def _add_new_instance(self,  device_id, class_id, instance_id, attributes):
+        """
+        Create an entry for a instance of an existing class in the external database
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+        """
+        self.log.debug('add', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+
+        now = self._time_to_string(datetime.utcnow())
+        attrs = [AlarmAttributeData(name=k,
+                                    value=self._attribute_to_string(v)) for k, v in attributes.items()]
+        instance_data = AlarmInstanceData(instance_id=instance_id,
+                                          created=now,
+                                          modified=now,
+                                          attributes=attrs)
+
+        self._root_proxy.add(AlarmDbExternal.INSTANCES_PATH.format(device_id, class_id),
+                             instance_data)
+
+        self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+                       entity_id=instance_id, attributes=attributes)
+        return True
+
+    def set(self, device_id, class_id, instance_id, attributes):
+        """
+        Set a database value.  This should only be called by the Alarm synchronizer
+        and its related tasks
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('set', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+        try:
+            if not isinstance(device_id, basestring):
+                raise TypeError('Device ID should be a string')
+
+            if not 0 <= class_id <= 0xFFFF:
+                raise ValueError("Invalid Class ID: {}, should be 0..65535".format(class_id))
+
+            if not 0 <= instance_id <= 0xFFFF:
+                raise ValueError("Invalid Instance ID: {}, should be 0..65535".format(instance_id))
+
+            if not isinstance(attributes, dict):
+                raise TypeError("Attributes should be a dictionary")
+
+            if not self._started:
+                raise DatabaseStateError('The Database is not currently active')
+
+            # Determine the best strategy to add the information
+            dev_proxy = self._device_proxy(device_id)
+
+            try:
+                class_data = dev_proxy.get(AlarmDbExternal.CLASS_PATH.format(class_id), deep=True)
+
+                inst_data = next((inst for inst in class_data.instances
+                                 if inst.instance_id == instance_id), None)
+
+                if inst_data is None:
+                    return self._add_new_instance(device_id, class_id, instance_id, attributes)
+
+                # Possibly adding to or updating an existing instance
+                # Get instance proxy, creating it if needed
+
+                exist_attr_indexes = dict()
+                attr_len = len(inst_data.attributes)
+
+                for index in xrange(0, attr_len):
+                    exist_attr_indexes[inst_data.attributes[index].name] = index
+
+                modified = False
+                str_value = ''
+                new_attributes = []
+
+                for k, v in attributes.items():
+                    try:
+                        str_value = self._attribute_to_string(v)
+                        new_attributes.append(AlarmAttributeData(name=k, value=str_value))
+
+                    except Exception as e:
+                        self.log.exception('save-error', e=e, class_id=class_id,
+                                           attr=k, value_type=type(v))
+
+                    if k not in exist_attr_indexes or \
+                            inst_data.attributes[exist_attr_indexes[k]].value != str_value:
+                        modified = True
+
+                if modified:
+                    now = datetime.utcnow()
+                    new_data = AlarmInstanceData(instance_id=instance_id,
+                                                 created=inst_data.created,
+                                                 modified=self._time_to_string(now),
+                                                 attributes=new_attributes)
+                    dev_proxy.remove(AlarmDbExternal.INSTANCE_PATH.format(class_id, instance_id))
+                    self._root_proxy.add(AlarmDbExternal.INSTANCES_PATH.format(device_id,
+                                                                               class_id), new_data)
+
+                self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+                               entity_id=instance_id, attributes=attributes, modified=modified)
+                return modified
+
+            except KeyError:
+                # Here if the class-id does not yet exist in the database
+                return self._add_new_class(device_id, class_id, instance_id,
+                                           attributes)
+        except Exception as e:
+            self.log.exception('set-exception', device_id=device_id, class_id=class_id,
+                               instance_id=instance_id, attributes=attributes, e=e)
+            raise
+
+    def delete(self, device_id, class_id, entity_id):
+        """
+        Delete an entity from the database if it exists.  If all instances
+        of a class are deleted, the class is deleted as well.
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Entity ID
+
+        :returns: (bool) True if the instance was found and deleted. False
+                         if it did not exist.
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('delete', device_id=device_id, class_id=class_id,
+                       entity_id=entity_id)
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        if not 0 <= entity_id <= 0xFFFF:
+            raise ValueError('instance-id is 0..0xFFFF')
+
+        try:
+            # Remove instance
+            self._instance_proxy(device_id, class_id, entity_id).remove('/')
+            now = datetime.utcnow()
+
+            # If resulting class has no instance, remove it as well
+            class_proxy = self._class_proxy(device_id, class_id)
+            class_data = class_proxy.get('/', depth=1)
+
+            if len(class_data.instances) == 0:
+                class_proxy.remove('/')
+
+            self._modified = now
+            return True
+
+        except KeyError:
+            return False    # Not found
+
+        except Exception as e:
+            self.log.exception('get-last-data-exception', device_id=device_id, e=e)
+            raise
+
+    def query(self, device_id, class_id=None, instance_id=None, attributes=None):
+        """
+        Get database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param device_id: (str) ONU Device ID
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attributes: (list/set or str) Managed Entity instance's attributes
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises KeyError: If the requested device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('query', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+        try:
+            if class_id is None:
+                # Get full device info
+                dev_data = self._device_proxy(device_id).get('/', depth=-1)
+                data = self._device_to_dict(dev_data)
+
+            elif instance_id is None:
+                # Get all instances of the class
+                try:
+                    cls_data = self._class_proxy(device_id, class_id).get('/', depth=-1)
+                    data = self._class_to_dict(cls_data)
+
+                except KeyError:
+                    data = dict()
+
+            else:
+                # Get all attributes of a specific ME
+                try:
+                    inst_data = self._instance_proxy(device_id, class_id, instance_id).\
+                        get('/', depth=-1)
+
+                    if attributes is None:
+                        # All Attributes
+                        data = self._instance_to_dict(inst_data)
+
+                    else:
+                        # Specific attribute(s)
+                        if isinstance(attributes, basestring):
+                            attributes = {attributes}
+
+                        data = {
+                            attr.name: self._string_to_attribute(attr.value)
+                            for attr in inst_data.attributes if attr.name in attributes}
+
+                except KeyError:
+                    data = dict()
+
+            return data
+
+        except KeyError:
+            self.log.warn('query-no-device', device_id=device_id)
+            raise
+
+        except Exception as e:
+            self.log.exception('get-last-sync-exception', device_id=device_id, e=e)
+            raise
+
+    def _instance_to_dict(self, instance):
+        if not isinstance(instance, AlarmInstanceData):
+            raise TypeError('{} is not of type AlarmInstanceData'.format(type(instance)))
+
+        data = {
+            INSTANCE_ID_KEY: instance.instance_id,
+            CREATED_KEY: self._string_to_time(instance.created),
+            MODIFIED_KEY: self._string_to_time(instance.modified),
+            ATTRIBUTES_KEY: dict()
+        }
+        for attribute in instance.attributes:
+            data[ATTRIBUTES_KEY][attribute.name] = self._string_to_attribute(attribute.value)
+        return data
+
+    def _class_to_dict(self, val):
+        if not isinstance(val, AlarmClassData):
+            raise TypeError('{} is not of type AlarmClassData'.format(type(val)))
+
+        data = {
+            CLASS_ID_KEY: val.class_id,
+        }
+        for instance in val.instances:
+            data[instance.instance_id] = self._instance_to_dict(instance)
+        return data
+
+    def _device_to_dict(self, val):
+        if not isinstance(val, AlarmDeviceData):
+            raise TypeError('{} is not of type AlarmDeviceData'.format(type(val)))
+
+        data = {
+            DEVICE_ID_KEY: val.device_id,
+            CREATED_KEY: self._string_to_time(val.created),
+            VERSION_KEY: val.version,
+            ME_KEY: dict(),
+            MSG_TYPE_KEY: set()
+        }
+        for class_data in val.classes:
+            data[class_data.class_id] = self._class_to_dict(class_data)
+        for managed_entity in val.managed_entities:
+            data[ME_KEY][managed_entity.class_id] = managed_entity.name
+
+        for msg_type in val.message_types:
+            data[MSG_TYPE_KEY].add(msg_type.message_type)
+
+        return data
diff --git a/python/extensions/omci/database/mib_db_api.py b/python/extensions/omci/database/mib_db_api.py
new file mode 100644
index 0000000..eb93323
--- /dev/null
+++ b/python/extensions/omci/database/mib_db_api.py
@@ -0,0 +1,245 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+OpenOMCI MIB Database API
+"""
+
+import structlog
+from datetime import datetime
+
+CREATED_KEY = 'created'
+MODIFIED_KEY = 'modified'
+MDS_KEY = 'mib_data_sync'
+LAST_SYNC_KEY = 'last_mib_sync'
+VERSION_KEY = 'version'
+DEVICE_ID_KEY = 'device_id'
+CLASS_ID_KEY = 'class_id'
+INSTANCE_ID_KEY = 'instance_id'
+ATTRIBUTES_KEY = 'attributes'
+ME_KEY = 'managed_entities'
+MSG_TYPE_KEY = 'message_types'
+
+
+class DatabaseStateError(Exception):
+    def __init__(self, *args):
+        Exception.__init__(self, *args)
+
+
+class MibDbApi(object):
+    """
+    MIB Database API Base Class
+
+    Derive the ME MIB Database implementation from this API.  For an example
+    implementation, look at the mib_db_dict.py implementation
+    """
+    def __init__(self, omci_agent):
+        """
+        Class initializer
+        :param omci_agent: (OpenOMCIAgent) OpenOMCI Agent
+        """
+        self.log = structlog.get_logger()
+        self._omci_agent = omci_agent
+        self._started = False
+
+        now = datetime.utcnow()
+        self._created = now
+        self._modified = now
+
+    def start(self):
+        """
+        Start up/restore the database. For in-memory, will be a nop. For external
+        DB, may need to create the DB and fetch create/modified values
+        """
+        if not self._started:
+            self._started = True
+        # For a derived class that is a persistent DB, Restore DB (connect,
+        # get created/modified times, ....) or something along those lines.
+        # Minimal restore could just be getting ONU device IDs' so they are cached
+        # locally. Maximum restore would be a full in-memory version of database
+        # for fast 'GET' request support.
+        # Remember to restore the '_created' and '_modified' times (above) as well
+        # from the database
+
+    def stop(self):
+        """
+        Start up the database. For in-memory, will be a nop. For external
+        DB, may need to create the DB and fetch create/modified values
+        """
+        if self._started:
+            self._started = False
+
+    @property
+    def active(self):
+        """
+        Is the database active
+        :return: (bool) True if active
+        """
+        return self._started
+
+    @property
+    def created(self):
+        """
+        Date (UTC) that the database was created
+        :return: (datetime) creation date
+        """
+        return self._created
+
+    @property
+    def modified(self):
+        """
+        Date (UTC) that the database last added or removed a device
+        or updated a device's ME information
+        :return: (datetime) last modification date
+        """
+        return self._modified
+
+    def add(self, device_id, overwrite=False):
+        """
+        Add a new ONU to database
+
+        :param device_id: (str) Device ID of ONU to add
+        :param overwrite: (bool) Overwrite existing entry if found.
+
+        :raises KeyError: If device already exists and 'overwrite' is False
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def remove(self, device_id):
+        """
+        Remove an ONU from the database
+
+        :param device_id: (str) Device ID of ONU to remove from database
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def set(self, device_id, class_id, entity_id, attributes):
+        """
+        Set/Create a database value.  This should only be called by the MIB synchronizer
+        and its related tasks
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def delete(self, device_id, class_id, entity_id):
+        """
+        Delete an entity from the database if it exists
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Entity ID
+
+        :returns: (bool) True if the instance was found and deleted. False
+                         if it did not exist.
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def query(self, device_id, class_id=None, instance_id=None, attributes=None):
+        """
+        Get database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param device_id: (str) ONU Device ID
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attributes: (list/set or str) Managed Entity instance's attributes
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises KeyError: If the requested device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def on_mib_reset(self, device_id):
+        """
+        Reset/clear the database for a specific Device
+
+        :param device_id: (str) ONU Device ID
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        # Your derived class should clear out all MIB data and update the
+        # modified stats appropriately
+        raise NotImplementedError('Implement this in your derive class')
+
+    def save_mib_data_sync(self, device_id, value):
+        """
+        Save the MIB Data Sync to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (int) Value to save
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def get_mib_data_sync(self, device_id):
+        """
+        Get the MIB Data Sync value last saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def save_last_sync(self, device_id, value):
+        """
+        Save the Last Sync time to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (DateTime) Value to save
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def get_last_sync(self, device_id):
+        """
+        Get the Last SYnc Time saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def update_supported_managed_entities(self, device_id, managed_entities):
+        """
+        Update the supported OMCI Managed Entities for this device
+
+        :param device_id: (str) ONU Device ID
+        :param managed_entities: (set) Managed Entity class IDs
+        """
+        raise NotImplementedError('Implement this in your derive class')
+
+    def update_supported_message_types(self, device_id, msg_types):
+        """
+        Update the supported OMCI Managed Entities for this device
+
+        :param device_id: (str) ONU Device ID
+        :param msg_types: (set) Message Type values (ints)
+        """
+        raise NotImplementedError('Implement this in your derive class')
diff --git a/python/extensions/omci/database/mib_db_dict.py b/python/extensions/omci/database/mib_db_dict.py
new file mode 100644
index 0000000..6a7de8f
--- /dev/null
+++ b/python/extensions/omci/database/mib_db_dict.py
@@ -0,0 +1,524 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import copy
+from mib_db_api import *
+import json
+
+
+class MibDbVolatileDict(MibDbApi):
+    """
+    A very simple in-memory database for ME storage. Data is not persistent
+    across reboots.
+
+    In Phase 2, this DB will be instantiated on a per-ONU basis but act as if
+    it is shared for all ONUs. This class will be updated with and external
+    key-value store (or other appropriate database) in Voltha 1.3 Sprint 3
+
+    This class can be used for unit tests
+    """
+    CURRENT_VERSION = 1
+
+    def __init__(self, omci_agent):
+        """
+        Class initializer
+        :param omci_agent: (OpenOMCIAgent) OpenOMCI Agent
+        """
+        super(MibDbVolatileDict, self).__init__(omci_agent)
+        self._data = dict()   # device_id -> ME ID -> Inst ID -> Attr Name -> Values
+
+    def start(self):
+        """
+        Start up/restore the database. For in-memory, will be a nop. For external
+        DB, may need to create the DB and fetch create/modified values
+        """
+        super(MibDbVolatileDict, self).start()
+        # TODO: Delete this method if nothing else is done except calling the base class
+
+    def stop(self):
+        """
+        Start up the database. For in-memory, will be a nop. For external
+        DB, may need to create the DB and fetch create/modified values
+        """
+        super(MibDbVolatileDict, self).stop()
+        # TODO: Delete this method if nothing else is done except calling the base class
+
+    def add(self, device_id, overwrite=False):
+        """
+        Add a new ONU to database
+
+        :param device_id: (str) Device ID of ONU to add
+        :param overwrite: (bool) Overwrite existing entry if found.
+
+        :raises KeyError: If device already exist and 'overwrite' is False
+        """
+        self.log.debug('add-device', device_id=device_id, overwrite=overwrite)
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not overwrite and device_id in self._data:
+            raise KeyError('Device {} already exists in the database'
+                           .format(device_id))
+
+        now = datetime.utcnow()
+        self._data[device_id] = {
+            DEVICE_ID_KEY: device_id,
+            CREATED_KEY: now,
+            LAST_SYNC_KEY: None,
+            MDS_KEY: 0,
+            VERSION_KEY: MibDbVolatileDict.CURRENT_VERSION,
+            ME_KEY: dict(),
+            MSG_TYPE_KEY: set()
+        }
+
+    def remove(self, device_id):
+        """
+        Remove an ONU from the database
+
+        :param device_id: (str) Device ID of ONU to remove from database
+        """
+        self.log.debug('remove-device', device_id=device_id)
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if device_id in self._data:
+            del self._data[device_id]
+            self._modified = datetime.utcnow()
+
+    def on_mib_reset(self, device_id):
+        """
+        Reset/clear the database for a specific Device
+
+        :param device_id: (str) ONU Device ID
+        :raises DatabaseStateError: If the database is not enabled
+        :raises KeyError: If the device does not exist in the database
+        """
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        device_db = self._data[device_id]
+        self._modified = datetime.utcnow()
+
+        self._data[device_id] = {
+            DEVICE_ID_KEY: device_id,
+            CREATED_KEY: device_db[CREATED_KEY],
+            LAST_SYNC_KEY: device_db[LAST_SYNC_KEY],
+            MDS_KEY: 0,
+            VERSION_KEY: MibDbVolatileDict.CURRENT_VERSION,
+            ME_KEY: device_db[ME_KEY],
+            MSG_TYPE_KEY: device_db[MSG_TYPE_KEY]
+        }
+
+    def save_mib_data_sync(self, device_id, value):
+        """
+        Save the MIB Data Sync to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (int) Value to save
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not isinstance(value, int):
+            raise TypeError('MIB Data Sync is an integer')
+
+        if not 0 <= value <= 255:
+            raise ValueError('Invalid MIB-data-sync value {}.  Must be 0..255'.
+                             format(value))
+
+        self._data[device_id][MDS_KEY] = value
+        self._modified = datetime.utcnow()
+
+    def get_mib_data_sync(self, device_id):
+        """
+        Get the MIB Data Sync value last saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if device_id not in self._data:
+            return None
+
+        return self._data[device_id].get(MDS_KEY)
+
+    def save_last_sync(self, device_id, value):
+        """
+        Save the Last Sync time to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (DateTime) Value to save
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not isinstance(value, datetime):
+            raise TypeError('Expected a datetime object, got {}'.
+                            format(type(datetime)))
+
+        self._data[device_id][LAST_SYNC_KEY] = value
+        self._modified = datetime.utcnow()
+
+    def get_last_sync(self, device_id):
+        """
+        Get the Last SYnc Time saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if device_id not in self._data:
+            return None
+
+        return self._data[device_id].get(LAST_SYNC_KEY)
+
+    def set(self, device_id, class_id, instance_id, attributes):
+        """
+        Set a database value.  This should only be called by the MIB synchronizer
+        and its related tasks
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be a string')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError("Invalid Class ID: {}, should be 0..65535".format(class_id))
+
+        if not 0 <= instance_id <= 0xFFFF:
+            raise ValueError("Invalid Instance ID: {}, should be 0..65535".format(instance_id))
+
+        if not isinstance(attributes, dict):
+            raise TypeError("Attributes should be a dictionary")
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        now = datetime.utcnow()
+        try:
+            device_db = self._data[device_id]
+            class_db = device_db.get(class_id)
+            created = False
+
+            if class_db is None:
+                device_db[class_id] = {CLASS_ID_KEY: class_id}
+
+                class_db = device_db[class_id]
+                self._modified = now
+                created = True
+
+            instance_db = class_db.get(instance_id)
+            if instance_db is None:
+                class_db[instance_id] = {
+                    INSTANCE_ID_KEY: instance_id,
+                    CREATED_KEY: now,
+                    MODIFIED_KEY: now,
+                    ATTRIBUTES_KEY: dict()
+                }
+                instance_db = class_db[instance_id]
+                self._modified = now
+                created = True
+
+            changed = False
+
+            me_map = self._omci_agent.get_device(device_id).me_map
+            entity = me_map.get(class_id)
+
+            for attribute, value in attributes.items():
+                assert isinstance(attribute, basestring)
+                assert value is not None, "Attribute '{}' value cannot be 'None'".\
+                    format(attribute)
+
+                db_value = instance_db[ATTRIBUTES_KEY].get(attribute) \
+                    if ATTRIBUTES_KEY in instance_db else None
+
+                if entity is not None and isinstance(value, basestring):
+                    from scapy.fields import StrFixedLenField
+                    attr_index = entity.attribute_name_to_index_map[attribute]
+                    eca = entity.attributes[attr_index]
+                    field = eca.field
+
+                    if isinstance(field, StrFixedLenField):
+                        from scapy.base_classes import Packet_metaclass
+                        if isinstance(field.default, Packet_metaclass) \
+                                and hasattr(field.default, 'json_from_value'):
+                            # Value/hex of Packet Class to string
+                            value = field.default.json_from_value(value)
+
+                if entity is not None and attribute in entity.attribute_name_to_index_map:
+                    attr_index = entity.attribute_name_to_index_map[attribute]
+                    eca = entity.attributes[attr_index]
+                    field = eca.field
+
+                    if hasattr(field, 'to_json'):
+                        value = field.to_json(value, db_value)
+
+                # Complex packet types may have an attribute encoded as an object, this
+                # can be check by seeing if there is a to_json() conversion callable
+                # defined
+                if hasattr(value, 'to_json'):
+                    value = value.to_json()
+
+                # Other complex packet types may be a repeated list field (FieldListField)
+                elif isinstance(value, (list, dict)):
+                    value = json.dumps(value, separators=(',', ':'))
+
+                assert db_value is None or isinstance(value, type(db_value)), \
+                    "New value type for attribute '{}' type is changing from '{}' to '{}'".\
+                    format(attribute, type(db_value), type(value))
+
+                if db_value is None or db_value != value:
+                    instance_db[ATTRIBUTES_KEY][attribute] = value
+                    changed = True
+
+            if changed:
+                instance_db[MODIFIED_KEY] = now
+                self._modified = now
+
+            return changed or created
+
+        except Exception as e:
+            self.log.error('set-failure', e=e, class_id=class_id,
+                           instance_id=instance_id, attributes=attributes)
+            raise
+
+    def delete(self, device_id, class_id, instance_id):
+        """
+        Delete an entity from the database if it exists.  If all instances
+        of a class are deleted, the class is deleted as well.
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+
+        :returns: (bool) True if the instance was found and deleted. False
+                         if it did not exist.
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        if not 0 <= instance_id <= 0xFFFF:
+            raise ValueError('instance-id is 0..0xFFFF')
+
+        try:
+            device_db = self._data[device_id]
+            class_db = device_db.get(class_id)
+
+            if class_db is None:
+                return False
+
+            instance_db = class_db.get(instance_id)
+            if instance_db is None:
+                return False
+
+            now = datetime.utcnow()
+            del class_db[instance_id]
+
+            if len(class_db) == 1:      # Is only 'CLASS_ID_KEY' remaining
+                del device_db[class_id]
+
+            self._modified = now
+            return True
+
+        except Exception as e:
+            self.log.error('delete-failure', e=e)
+            raise
+
+    def query(self, device_id, class_id=None, instance_id=None, attributes=None):
+        """
+        Get database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param device_id: (str) ONU Device ID
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attributes: (list/set or str) Managed Entity instance's attributes
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises KeyError: If the requested device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('query', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID is a string')
+
+        device_db = self._data[device_id]
+        if class_id is None:
+            return self._fix_dev_json_attributes(copy.copy(device_db), device_id)
+
+        if not isinstance(class_id, int):
+            raise TypeError('Class ID is an integer')
+
+        me_map = self._omci_agent.get_device(device_id).me_map
+        entity = me_map.get(class_id)
+
+        class_db = device_db.get(class_id, dict())
+        if instance_id is None or len(class_db) == 0:
+            return self._fix_cls_json_attributes(copy.copy(class_db), entity)
+
+        if not isinstance(instance_id, int):
+            raise TypeError('Instance ID is an integer')
+
+        instance_db = class_db.get(instance_id, dict())
+        if attributes is None or len(instance_db) == 0:
+            return self._fix_inst_json_attributes(copy.copy(instance_db), entity)
+
+        if not isinstance(attributes, (basestring, list, set)):
+            raise TypeError('Attributes should be a string or list/set of strings')
+
+        if not isinstance(attributes, (list, set)):
+            attributes = [attributes]
+
+        results = {attr: val for attr, val in instance_db[ATTRIBUTES_KEY].iteritems()
+                   if attr in attributes}
+
+        for attr, attr_data in results.items():
+            attr_index = entity.attribute_name_to_index_map[attr]
+            eca = entity.attributes[attr_index]
+            results[attr] = self._fix_attr_json_attribute(copy.copy(attr_data), eca)
+
+        return results
+
+    #########################################################################
+    # Following routines are used to fix-up JSON encoded complex data. A
+    # nice side effect is that the values returned will be a deep-copy of
+    # the class/instance/attribute data of what is in the database. Note
+    # That other database values (created, modified, ...) will still reference
+    # back to the original DB.
+
+    def _fix_dev_json_attributes(self, dev_data, device_id):
+        for cls_id, cls_data in dev_data.items():
+            if isinstance(cls_id, int):
+                me_map = self._omci_agent.get_device(device_id).me_map
+                entity = me_map.get(cls_id)
+                dev_data[cls_id] = self._fix_cls_json_attributes(copy.copy(cls_data), entity)
+        return dev_data
+
+    def _fix_cls_json_attributes(self, cls_data, entity):
+        for inst_id, inst_data in cls_data.items():
+            if isinstance(inst_id, int):
+                cls_data[inst_id] = self._fix_inst_json_attributes(copy.copy(inst_data), entity)
+        return cls_data
+
+    def _fix_inst_json_attributes(self, inst_data, entity):
+        if ATTRIBUTES_KEY in inst_data:
+            for attr, attr_data in inst_data[ATTRIBUTES_KEY].items():
+                attr_index = entity.attribute_name_to_index_map[attr] \
+                    if entity is not None and attr in entity.attribute_name_to_index_map else None
+                eca = entity.attributes[attr_index] if attr_index is not None else None
+                inst_data[ATTRIBUTES_KEY][attr] = self._fix_attr_json_attribute(copy.copy(attr_data), eca)
+        return inst_data
+
+    def _fix_attr_json_attribute(self, attr_data, eca):
+
+        try:
+            if eca is not None:
+                field = eca.field
+                if hasattr(field, 'load_json'):
+                    value = field.load_json(attr_data)
+                    return value
+
+            return json.loads(attr_data) if isinstance(attr_data, basestring) else attr_data
+
+        except ValueError:
+            return attr_data
+
+        except Exception as e:
+            pass
+
+    def update_supported_managed_entities(self, device_id, managed_entities):
+        """
+        Update the supported OMCI Managed Entities for this device
+
+        :param device_id: (str) ONU Device ID
+        :param managed_entities: (set) Managed Entity class IDs
+        """
+        now = datetime.utcnow()
+        try:
+            device_db = self._data[device_id]
+
+            entities = {class_id: self._managed_entity_to_name(device_id, class_id)
+                        for class_id in managed_entities}
+
+            device_db[ME_KEY] = entities
+            self._modified = now
+
+        except Exception as e:
+            self.log.error('set-me-failure', e=e)
+            raise
+
+    def _managed_entity_to_name(self, device_id, class_id):
+        me_map = self._omci_agent.get_device(device_id).me_map
+        entity = me_map.get(class_id)
+
+        return entity.__name__ if entity is not None else 'UnknownManagedEntity'
+
+    def update_supported_message_types(self, device_id, msg_types):
+        """
+        Update the supported OMCI Managed Entities for this device
+
+        :param device_id: (str) ONU Device ID
+        :param msg_types: (set) Message Type values (ints)
+        """
+        now = datetime.utcnow()
+        try:
+            msg_type_set = {msg_type.value for msg_type in msg_types}
+            self._data[device_id][MSG_TYPE_KEY] = msg_type_set
+            self._modified = now
+
+        except Exception as e:
+            self.log.error('set-me-failure', e=e)
+            raise
diff --git a/python/extensions/omci/database/mib_db_ext.py b/python/extensions/omci/database/mib_db_ext.py
new file mode 100644
index 0000000..6b49e2b
--- /dev/null
+++ b/python/extensions/omci/database/mib_db_ext.py
@@ -0,0 +1,1049 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from mib_db_api import *
+from voltha.protos.omci_mib_db_pb2 import MibInstanceData, MibClassData, \
+    MibDeviceData, MibAttributeData, MessageType, ManagedEntity
+from voltha.extensions.omci.omci_entities import *
+from voltha.extensions.omci.omci_fields import *
+from scapy.fields import StrField, FieldListField, PacketField
+
+
+class MibDbStatistic(object):
+    """
+    For debug/tuning purposes.
+
+    With etcd around the v1.5 time frame, seeing the following:
+
+        o Creates:  Avg:  57.1 mS, Min:  76 mS, Max: 511 mS    (146 samples)
+        o Sets:     Avg: 303.9 mS, Min: 126 mS, Max: 689 mS    (103 samples)
+        o Gets:     Avg:   3.3 mS, Min:   0 mS, Max:   8 mS    (  9 samples)
+        o Deletes:  No samples
+    """
+    def __init__(self, name):
+        self._name = name
+        self._count = 0
+        self._total_time = 0        # Total milliseconds
+        self._min_time = 99999999
+        self._max_time = 0
+
+    def get_statistics(self):
+        return {
+            'name': self._name,
+            'count': self._count,
+            'total_time': self._total_time,
+            'min_time': self._min_time,
+            'max_time': self._max_time,
+            'avg_time': self._total_time / self._count if self._count > 0 else 0
+        }
+
+    def clear_statistics(self):
+        self._count = 0
+        self._total_time = 0        # Total milliseconds
+        self._min_time = 99999999
+        self._max_time = 0
+
+    def increment(self, time):
+        self._count += 1
+        self._total_time += time        # Total milliseconds
+        if self._min_time > time:
+            self._min_time = time
+        if self._max_time < time:
+            self._max_time = time
+
+
+class MibDbExternal(MibDbApi):
+    """
+    A persistent external OpenOMCI MIB Database
+    """
+    CURRENT_VERSION = 1                       # VOLTHA v1.3.0 release
+
+    _TIME_FORMAT = '%Y%m%d-%H%M%S.%f'
+
+    # Paths from root proxy
+    MIB_PATH = '/omci_mibs'
+    DEVICE_PATH = MIB_PATH + '/{}'            # .format(device_id)
+
+    # Classes, Instances, and Attributes as lists from root proxy
+    CLASSES_PATH = DEVICE_PATH + '/classes'                                # .format(device_id)
+    INSTANCES_PATH = DEVICE_PATH + '/classes/{}/instances'                 # .format(device_id, class_id)
+    ATTRIBUTES_PATH = DEVICE_PATH + '/classes/{}/instances/{}/attributes'  # .format(device_id, class_id, instance_id)
+
+    # Single Class, Instance, and Attribute as objects from device proxy
+    CLASS_PATH = '/classes/{}'                                 # .format(class_id)
+    INSTANCE_PATH = '/classes/{}/instances/{}'                 # .format(class_id, instance_id)
+    ATTRIBUTE_PATH = '/classes/{}/instances/{}/attributes/{}'  # .format(class_id, instance_id
+                                                               #         attribute_name)
+
+    def __init__(self, omci_agent):
+        """
+        Class initializer
+        :param omci_agent: (OpenOMCIAgent) OpenOMCI Agent
+        """
+        super(MibDbExternal, self).__init__(omci_agent)
+        self._core = omci_agent.core
+        # Some statistics to help with debug/tuning/...
+        self._statistics = {
+            'get': MibDbStatistic('get'),
+            'set': MibDbStatistic('set'),
+            'create': MibDbStatistic('create'),
+            'delete': MibDbStatistic('delete')
+        }
+
+    def start(self):
+        """
+        Start up/restore the database
+        """
+        self.log.debug('start')
+
+        if not self._started:
+            super(MibDbExternal, self).start()
+            root_proxy = self._core.get_proxy('/')
+
+            try:
+                base = root_proxy.get(MibDbExternal.MIB_PATH)
+                self.log.info('db-exists', num_devices=len(base))
+
+            except Exception as e:
+                self.log.exception('start-failure', e=e)
+                raise
+
+    def stop(self):
+        """
+        Start up the database
+        """
+        self.log.debug('stop')
+
+        if self._started:
+            super(MibDbExternal, self).stop()
+            # TODO: Delete this method if nothing else is done except calling the base class
+
+    def _time_to_string(self, time):
+        return time.strftime(MibDbExternal._TIME_FORMAT) if time is not None else ''
+
+    def _string_to_time(self, time):
+        return datetime.strptime(time, MibDbExternal._TIME_FORMAT) if len(time) else None
+
+    def _attribute_to_string(self, device_id, class_id, attr_name, value, old_value = None):
+        """
+        Convert an ME's attribute value to string representation
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param attr_name: (str) Attribute Name (see EntityClasses)
+        :param value: (various) Attribute Value
+
+        :return: (str) String representation of the value
+        :raises KeyError: Device, Class ID, or Attribute does not exist
+        """
+        try:
+            me_map = self._omci_agent.get_device(device_id).me_map
+
+            if class_id in me_map:
+                entity = me_map[class_id]
+                attr_index = entity.attribute_name_to_index_map[attr_name]
+                eca = entity.attributes[attr_index]
+                field = eca.field
+            else:
+                # Here for auto-defined MEs (ones not defined in ME Map)
+                from voltha.extensions.omci.omci_cc import UNKNOWN_CLASS_ATTRIBUTE_KEY
+                field = StrFixedLenField(UNKNOWN_CLASS_ATTRIBUTE_KEY, None, 24)
+
+            if isinstance(field, StrFixedLenField):
+                from scapy.base_classes import Packet_metaclass
+                if hasattr(value, 'to_json') and not isinstance(value, basestring):
+                    # Packet Class to string
+                    str_value = value.to_json()
+                elif isinstance(field.default, Packet_metaclass) \
+                        and hasattr(field.default, 'json_from_value'):
+                        #and not isinstance(value, basestring):
+                    # Value/hex of Packet Class to string
+                    str_value = field.default.json_from_value(value)
+                else:
+                    str_value = str(value)
+
+            elif isinstance(field, (StrField, MACField, IPField)):
+                #  For StrField, value is an str already
+                #  For MACField, value is a string in ':' delimited form
+                #  For IPField, value is a string in '.' delimited form
+                str_value = str(value)
+
+            elif isinstance(field, (ByteField, ShortField, IntField, LongField)):
+                #  For ByteField, ShortField, IntField, and LongField value is an int
+                str_value = str(value)
+
+            elif isinstance(field, BitField):
+                # For BitField, value is a long
+                #
+                str_value = str(value)
+
+            elif hasattr(field, 'to_json'):
+                str_value = field.to_json(value, old_value)
+
+            elif isinstance(field, FieldListField):
+                str_value = json.dumps(value, separators=(',', ':'))
+
+            else:
+                self.log.warning('default-conversion', type=type(field),
+                                 class_id=class_id, attribute=attr_name, value=str(value))
+                str_value = str(value)
+
+            return str_value
+
+        except Exception as e:
+            self.log.exception('attr-to-string', device_id=device_id,
+                               class_id=class_id, attr=attr_name,
+                               value=value, e=e)
+            raise
+
+    def _string_to_attribute(self, device_id, class_id, attr_name, str_value):
+        """
+        Convert an ME's attribute value-string to its Scapy decode equivalent
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param attr_name: (str) Attribute Name (see EntityClasses)
+        :param str_value: (str) Attribute Value in string form
+
+        :return: (various) String representation of the value
+        :raises KeyError: Device, Class ID, or Attribute does not exist
+        """
+        try:
+            me_map = self._omci_agent.get_device(device_id).me_map
+
+            if class_id in me_map:
+                entity = me_map[class_id]
+                attr_index = entity.attribute_name_to_index_map[attr_name]
+                eca = entity.attributes[attr_index]
+                field = eca.field
+            else:
+                # Here for auto-defined MEs (ones not defined in ME Map)
+                from voltha.extensions.omci.omci_cc import UNKNOWN_CLASS_ATTRIBUTE_KEY
+                field = StrFixedLenField(UNKNOWN_CLASS_ATTRIBUTE_KEY, None, 24)
+
+            if isinstance(field, StrFixedLenField):
+                from scapy.base_classes import Packet_metaclass
+                default = field.default
+                if isinstance(default, Packet_metaclass) and \
+                        hasattr(default, 'to_json'):
+                    value = json.loads(str_value)
+                else:
+                    value = str_value
+
+            elif isinstance(field, MACField):
+                value = str_value
+
+            elif isinstance(field, IPField):
+                value = str_value
+
+            elif isinstance(field, (ByteField, ShortField, IntField, LongField)):
+                if str_value.lower() in ('true', 'false'):
+                    str_value = '1' if str_value.lower() == 'true' else '0'
+                value = int(str_value)
+
+            elif isinstance(field, BitField):
+                value = long(str_value)
+
+            elif hasattr(field, 'load_json'):
+                value = field.load_json(str_value)
+
+            elif isinstance(field, FieldListField):
+                value = json.loads(str_value)
+
+            else:
+                self.log.warning('default-conversion', type=type(field),
+                                 class_id=class_id, attribute=attr_name, value=str_value)
+                value = None
+
+            return value
+
+        except Exception as e:
+            self.log.exception('attr-to-string', device_id=device_id,
+                               class_id=class_id, attr=attr_name,
+                               value=str_value, e=e)
+            raise
+
+    def add(self, device_id, overwrite=False):
+        """
+        Add a new ONU to database
+
+        :param device_id: (str) Device ID of ONU to add
+        :param overwrite: (bool) Overwrite existing entry if found.
+
+        :raises KeyError: If device already exists and 'overwrite' is False
+        """
+        self.log.debug('add-device', device_id=device_id, overwrite=overwrite)
+
+        now = datetime.utcnow()
+        found = False
+        root_proxy = self._core.get_proxy('/')
+
+        data = MibDeviceData(device_id=device_id,
+                             created=self._time_to_string(now),
+                             last_sync_time='',
+                             mib_data_sync=0,
+                             version=MibDbExternal.CURRENT_VERSION)
+        try:
+            dev_proxy = self._device_proxy(device_id)
+            found = True
+
+            if not overwrite:
+                # Device already exists
+                raise KeyError('Device with ID {} already exists in MIB database'.
+                               format(device_id))
+
+            # Overwrite with new data
+            data = dev_proxy.get('/', depth=0)
+            self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id), data)
+            self._modified = now
+
+        except KeyError:
+            if found:
+                raise
+            # Did not exist, add it now
+            root_proxy.add(MibDbExternal.MIB_PATH, data)
+            self._created = now
+            self._modified = now
+
+    def remove(self, device_id):
+        """
+        Remove an ONU from the database
+
+        :param device_id: (str) Device ID of ONU to remove from database
+        """
+        self.log.debug('remove-device', device_id=device_id)
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        try:
+            # self._root_proxy.get(MibDbExternal.DEVICE_PATH.format(device_id))
+            self._root_proxy.remove(MibDbExternal.DEVICE_PATH.format(device_id))
+            self._modified = datetime.utcnow()
+
+        except KeyError:
+            # Did not exists, which is not a failure
+            pass
+
+        except Exception as e:
+            self.log.exception('remove-exception', device_id=device_id, e=e)
+            raise
+
+    @property
+    def _root_proxy(self):
+        return self._core.get_proxy('/')
+
+    def _device_proxy(self, device_id):
+        """
+        Return a config proxy to the OMCI MIB_DB leaf for a given device
+
+        :param device_id: (str) ONU Device ID
+        :return: (ConfigProxy) Configuration proxy rooted at OMCI MIB DB
+        :raises KeyError: If the device does not exist in the database
+        """
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        return self._core.get_proxy(MibDbExternal.DEVICE_PATH.format(device_id))
+
+    def _class_proxy(self, device_id, class_id, create=False):
+        """
+        Get a config proxy to a specific managed entity class
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param create: (bool) If true, create default instance (and class)
+        :return: (ConfigProxy) Class configuration proxy
+
+        :raises DatabaseStateError: If database is not started
+        :raises KeyError: If Instance does not exist and 'create' is False
+        """
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        fmt = MibDbExternal.DEVICE_PATH + MibDbExternal.CLASS_PATH
+        path = fmt.format(device_id, class_id)
+
+        try:
+            return self._core.get_proxy(path)
+
+        except KeyError:
+            if not create:
+                # This can occur right after a MIB Reset if the ONU publishes AVCs right away
+                # and during the MIB audit resync for ONU created MEs in response to an OLT
+                # created ME.  Fail since for these test cases they occur during a verification
+                # 'query' and not the ME creation during resync. Calling code should handle
+                # they exception if it is expected to occur on occasion.
+                self.log.debug('class-proxy-does-not-exist', device_id=device_id,
+                               class_id=class_id)
+                raise
+
+        # Create class
+        data = MibClassData(class_id=class_id)
+        root_path = MibDbExternal.CLASSES_PATH.format(device_id)
+        self._root_proxy.add(root_path, data)
+
+        return self._core.get_proxy(path)
+
+    def _instance_proxy(self, device_id, class_id, instance_id, create=False):
+        """
+        Get a config proxy to a specific managed entity instance
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) Class ID
+        :param instance_id: (int) Instance ID
+        :param create: (bool) If true, create default instance (and class)
+        :return: (ConfigProxy) Instance configuration proxy
+
+        :raises DatabaseStateError: If database is not started
+        :raises KeyError: If Instance does not exist and 'create' is False
+        """
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID is a string')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        if not 0 <= instance_id <= 0xFFFF:
+            raise ValueError('instance-id is 0..0xFFFF')
+
+        fmt = MibDbExternal.DEVICE_PATH + MibDbExternal.INSTANCE_PATH
+        path = fmt.format(device_id, class_id, instance_id)
+
+        try:
+            return self._core.get_proxy(path)
+
+        except KeyError:
+            if not create:
+                # This can occur right after a MIB Reset if the ONU publishes AVCs right away
+                # and during the MIB audit resync for ONU created MEs in response to an OLT
+                # created ME.  Fail since for these test cases they occur during a verification
+                # 'query' and not the ME creation during resync. Calling code should handle
+                # they exception if it is expected to occur on occasion.
+                self.log.info('instance-proxy-does-not-exist', device_id=device_id,
+                              class_id=class_id, instance_id=instance_id)
+                raise
+
+        # Create instance, first make sure class exists
+        self._class_proxy(device_id, class_id, create=True)
+
+        now = self._time_to_string(datetime.utcnow())
+        data = MibInstanceData(instance_id=instance_id, created=now, modified=now)
+        root_path = MibDbExternal.INSTANCES_PATH.format(device_id, class_id)
+        self._root_proxy.add(root_path, data)
+
+        return self._core.get_proxy(path)
+
+    def on_mib_reset(self, device_id):
+        """
+        Reset/clear the database for a specific Device
+
+        :param device_id: (str) ONU Device ID
+        :raises DatabaseStateError: If the database is not enabled
+        :raises KeyError: If the device does not exist in the database
+        """
+        self.log.debug('on-mib-reset', device_id=device_id)
+
+        try:
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=2)
+
+            # Wipe out any existing class IDs
+            class_ids = [c.class_id for c in data.classes]
+
+            if len(class_ids):
+                for class_id in class_ids:
+                    device_proxy.remove(MibDbExternal.CLASS_PATH.format(class_id))
+
+            # Reset MIB Data Sync to zero
+            now = datetime.utcnow()
+            data = MibDeviceData(device_id=device_id,
+                                 created=data.created,
+                                 last_sync_time=data.last_sync_time,
+                                 mib_data_sync=0,
+                                 version=MibDbExternal.CURRENT_VERSION)
+            # Update
+            self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('mib-reset-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('mib-reset-exception', device_id=device_id, e=e)
+            raise
+
+    def save_mib_data_sync(self, device_id, value):
+        """
+        Save the MIB Data Sync to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (int) Value to save
+        """
+        self.log.debug('save-mds', device_id=device_id, value=value)
+
+        try:
+            if not isinstance(value, int):
+                raise TypeError('MIB Data Sync is an integer')
+
+            if not 0 <= value <= 255:
+                raise ValueError('Invalid MIB-data-sync value {}.  Must be 0..255'.
+                                 format(value))
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+
+            now = datetime.utcnow()
+            data.mib_data_sync = value
+
+            # Update
+            self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('save-mds-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('save-mds-exception', device_id=device_id, e=e)
+            raise
+
+    def get_mib_data_sync(self, device_id):
+        """
+        Get the MIB Data Sync value last saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        self.log.debug('get-mds', device_id=device_id)
+
+        try:
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+            return int(data.mib_data_sync)
+
+        except KeyError:
+            return None     # OMCI MIB_DB entry has not yet been created
+
+        except Exception as e:
+            self.log.exception('get-mds-exception', device_id=device_id, e=e)
+            raise
+
+    def save_last_sync(self, device_id, value):
+        """
+        Save the Last Sync time to the database in an easy location to access
+
+        :param device_id: (str) ONU Device ID
+        :param value: (DateTime) Value to save
+        """
+        self.log.debug('save-last-sync', device_id=device_id, time=str(value))
+
+        try:
+            if not isinstance(value, datetime):
+                raise TypeError('Expected a datetime object, got {}'.
+                                format(type(datetime)))
+
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+
+            now = datetime.utcnow()
+            data.last_sync_time = self._time_to_string(value)
+
+            # Update
+            self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('save-mds-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('save-last-sync-exception', device_id=device_id, e=e)
+            raise
+
+    def get_last_sync(self, device_id):
+        """
+        Get the Last Sync Time saved to the database for a device
+
+        :param device_id: (str) ONU Device ID
+        :return: (int) The Value or None if not found
+        """
+        self.log.debug('get-last-sync', device_id=device_id)
+
+        try:
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+            return self._string_to_time(data.last_sync_time)
+
+        except KeyError:
+            return None     # OMCI MIB_DB entry has not yet been created
+
+        except Exception as e:
+            self.log.exception('get-last-sync-exception', e=e)
+            raise
+
+    def _add_new_class(self, device_id, class_id, instance_id, attributes):
+        """
+        Create an entry for a new class in the external database
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+        """
+        self.log.debug('add', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+
+        now = self._time_to_string(datetime.utcnow())
+        attrs = []
+        for k, v in attributes.items():
+            if k == 'serial_number':
+                vendor_id = str(v[0:4])
+                vendor_specific = v[4:]
+                vendor_specific = str(vendor_specific.encode('hex'))
+                str_value = vendor_id + vendor_specific
+                attrs.append(MibAttributeData(name=k, value=str_value))
+            else:
+                str_value = self._attribute_to_string(device_id, class_id, k, v)
+                attrs.append(MibAttributeData(name=k, value=str_value))
+
+        class_data = MibClassData(class_id=class_id,
+                                  instances=[MibInstanceData(instance_id=instance_id,
+                                                             created=now,
+                                                             modified=now,
+                                                             attributes=attrs)])
+
+        self._root_proxy.add(MibDbExternal.CLASSES_PATH.format(device_id), class_data)
+        self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+                       entity_id=instance_id, attributes=attributes)
+        return True
+
+    def _add_new_instance(self,  device_id, class_id, instance_id, attributes):
+        """
+        Create an entry for a instance of an existing class in the external database
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+        """
+        self.log.debug('add', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+
+        now = self._time_to_string(datetime.utcnow())
+        attrs = []
+        for k, v in attributes.items():
+            if k == 'serial_number':
+                vendor_id = str(v[0:4])
+                vendor_specific = v[4:]
+                vendor_specific = str(vendor_specific.encode('hex'))
+                str_value = vendor_id+vendor_specific
+                attrs.append(MibAttributeData(name=k, value=str_value))
+            else:
+                str_value = self._attribute_to_string(device_id, class_id, k, v)
+                attrs.append(MibAttributeData(name=k, value=str_value))
+
+        instance_data = MibInstanceData(instance_id=instance_id,
+                                        created=now,
+                                        modified=now,
+                                        attributes=attrs)
+
+        self._root_proxy.add(MibDbExternal.INSTANCES_PATH.format(device_id, class_id),
+                             instance_data)
+
+        self.log.debug('set-complete', device_id=device_id, class_id=class_id,
+                       entity_id=instance_id, attributes=attributes)
+        return True
+
+    def set(self, device_id, class_id, instance_id, attributes):
+        """
+        Set a database value.  This should only be called by the MIB synchronizer
+        and its related tasks
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) ME Entity ID
+        :param attributes: (dict) Attribute dictionary
+
+        :returns: (bool) True if the value was saved to the database. False if the
+                         value was identical to the current instance
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('set', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+        try:
+            if not isinstance(device_id, basestring):
+                raise TypeError('Device ID should be a string')
+
+            if not 0 <= class_id <= 0xFFFF:
+                raise ValueError("Invalid Class ID: {}, should be 0..65535".format(class_id))
+
+            if not 0 <= instance_id <= 0xFFFF:
+                raise ValueError("Invalid Instance ID: {}, should be 0..65535".format(instance_id))
+
+            if not isinstance(attributes, dict):
+                raise TypeError("Attributes should be a dictionary")
+
+            if not self._started:
+                raise DatabaseStateError('The Database is not currently active')
+
+            # Determine the best strategy to add the information
+            dev_proxy = self._device_proxy(device_id)
+
+            operation = 'set'
+            start_time = None
+            try:
+                class_data = dev_proxy.get(MibDbExternal.CLASS_PATH.format(class_id), deep=True)
+
+                inst_data = next((inst for inst in class_data.instances
+                                 if inst.instance_id == instance_id), None)
+
+                if inst_data is None:
+                    operation = 'create'
+                    start_time = datetime.utcnow()
+                    return self._add_new_instance(device_id, class_id, instance_id, attributes)
+
+                # Possibly adding to or updating an existing instance
+                # Get instance proxy, creating it if needed
+
+                modified = False
+                new_attributes = []
+                exist_attr_indexes = dict()
+                attr_len = len(inst_data.attributes)
+
+                for index in xrange(0, attr_len):
+                    name = inst_data.attributes[index].name
+                    value = inst_data.attributes[index].value
+                    exist_attr_indexes[name] = index
+                    new_attributes.append(MibAttributeData(name=name, value=value))
+
+                for k, v in attributes.items():
+                    try:
+                        old_value = None if k not in exist_attr_indexes \
+                            else new_attributes[exist_attr_indexes[k]].value
+
+                        str_value = self._attribute_to_string(device_id, class_id, k, v, old_value)
+
+                        if k not in exist_attr_indexes:
+                            new_attributes.append(MibAttributeData(name=k, value=str_value))
+                            modified = True
+
+                        elif new_attributes[exist_attr_indexes[k]].value != str_value:
+                            new_attributes[exist_attr_indexes[k]].value = str_value
+                            modified = True
+
+                    except Exception as e:
+                        self.log.exception('save-error', e=e, class_id=class_id,
+                                           attr=k, value_type=type(v))
+
+                if modified:
+                    now = datetime.utcnow()
+                    start_time = now
+                    new_data = MibInstanceData(instance_id=instance_id,
+                                               created=inst_data.created,
+                                               modified=self._time_to_string(now),
+                                               attributes=new_attributes)
+                    dev_proxy.remove(MibDbExternal.INSTANCE_PATH.format(class_id, instance_id))
+                    self._root_proxy.add(MibDbExternal.INSTANCES_PATH.format(device_id,
+                                                                             class_id), new_data)
+                return modified
+
+            except KeyError:
+                # Here if the class-id does not yet exist in the database
+                self.log.debug("adding-key-not-found", class_id=class_id)
+                return self._add_new_class(device_id, class_id, instance_id,
+                                           attributes)
+            finally:
+                if start_time is not None:
+                    diff = datetime.utcnow() - start_time
+                    # NOTE: Change to 'debug' when checked in, manually change to 'info'
+                    #       for development testing.
+                    self.log.debug('db-{}-time'.format(operation), milliseconds=diff.microseconds/1000)
+                    self._statistics[operation].increment(diff.microseconds/1000)
+
+        except Exception as e:
+            self.log.exception('set-exception', device_id=device_id, class_id=class_id,
+                               instance_id=instance_id, attributes=attributes, e=e)
+            raise
+
+    def delete(self, device_id, class_id, entity_id):
+        """
+        Delete an entity from the database if it exists.  If all instances
+        of a class are deleted, the class is deleted as well.
+
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Entity ID
+
+        :returns: (bool) True if the instance was found and deleted. False
+                         if it did not exist.
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('delete', device_id=device_id, class_id=class_id,
+                       entity_id=entity_id)
+
+        if not self._started:
+            raise DatabaseStateError('The Database is not currently active')
+
+        if not isinstance(device_id, basestring):
+            raise TypeError('Device ID should be an string')
+
+        if not 0 <= class_id <= 0xFFFF:
+            raise ValueError('class-id is 0..0xFFFF')
+
+        if not 0 <= entity_id <= 0xFFFF:
+            raise ValueError('instance-id is 0..0xFFFF')
+
+        start_time = datetime.utcnow()
+        try:
+            # Remove instance
+            self._instance_proxy(device_id, class_id, entity_id).remove('/')
+            now = datetime.utcnow()
+
+            # If resulting class has no instance, remove it as well
+            class_proxy = self._class_proxy(device_id, class_id)
+            class_data = class_proxy.get('/', depth=1)
+
+            if len(class_data.instances) == 0:
+                class_proxy.remove('/')
+
+            self._modified = now
+            return True
+
+        except KeyError:
+            return False    # Not found
+
+        except Exception as e:
+            self.log.exception('get-last-sync-exception', device_id=device_id, e=e)
+            raise
+
+        finally:
+            diff = datetime.utcnow() - start_time
+            # NOTE: Change to 'debug' when checked in, manually change to 'info'
+            #       for development testing.
+            self.log.debug('db-delete-time', milliseconds=diff.microseconds/1000)
+            self._statistics['delete'].increment(diff.microseconds/1000)
+
+    def query(self, device_id, class_id=None, instance_id=None, attributes=None):
+        """
+        Get database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param device_id: (str) ONU Device ID
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attributes: (list/set or str) Managed Entity instance's attributes
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises KeyError: If the requested device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('query', device_id=device_id, class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+
+        start_time = datetime.utcnow()
+        end_time = None
+        try:
+            if class_id is None:
+                # Get full device info
+                dev_data = self._device_proxy(device_id).get('/', depth=-1)
+                end_time = datetime.utcnow()
+                data = self._device_to_dict(dev_data)
+
+            elif instance_id is None:
+                # Get all instances of the class
+                try:
+                    cls_data = self._class_proxy(device_id, class_id).get('/', depth=-1)
+                    end_time = datetime.utcnow()
+                    data = self._class_to_dict(device_id, cls_data)
+
+                except KeyError:
+                    data = dict()
+
+            else:
+                # Get all attributes of a specific ME
+                try:
+                    inst_data = self._instance_proxy(device_id, class_id, instance_id).\
+                        get('/', depth=-1)
+                    end_time = datetime.utcnow()
+
+                    if attributes is None:
+                        # All Attributes
+                        data = self._instance_to_dict(device_id, class_id, inst_data)
+
+                    else:
+                        # Specific attribute(s)
+                        if isinstance(attributes, basestring):
+                            attributes = {attributes}
+
+                        data = {
+                            attr.name: self._string_to_attribute(device_id,
+                                                                 class_id,
+                                                                 attr.name,
+                                                                 attr.value)
+                            for attr in inst_data.attributes if attr.name in attributes}
+
+                except KeyError:
+                    data = dict()
+
+            return data
+
+        except KeyError:
+            self.log.warn('query-no-device', device_id=device_id)
+            raise
+
+        except Exception as e:
+            self.log.exception('get-last-sync-exception', device_id=device_id, e=e)
+            raise
+
+        finally:
+            if end_time is not None:
+                diff = end_time.utcnow() - start_time
+                # NOTE: Change to 'debug' when checked in, manually change to 'info'
+                #       for development testing.
+                self.log.debug('db-get-time', milliseconds=diff.microseconds/1000, class_id=class_id,
+                               instance_id=instance_id)
+                self._statistics['get'].increment(diff.microseconds/1000)
+
+    def _instance_to_dict(self, device_id, class_id, instance):
+        if not isinstance(instance, MibInstanceData):
+            raise TypeError('{} is not of type MibInstanceData'.format(type(instance)))
+
+        data = {
+            INSTANCE_ID_KEY: instance.instance_id,
+            CREATED_KEY: self._string_to_time(instance.created),
+            MODIFIED_KEY: self._string_to_time(instance.modified),
+            ATTRIBUTES_KEY: dict()
+        }
+        for attribute in instance.attributes:
+            data[ATTRIBUTES_KEY][attribute.name] = self._string_to_attribute(device_id,
+                                                                             class_id,
+                                                                             attribute.name,
+                                                                             attribute.value)
+        return data
+
+    def _class_to_dict(self, device_id, val):
+        if not isinstance(val, MibClassData):
+            raise TypeError('{} is not of type MibClassData'.format(type(val)))
+
+        data = {
+            CLASS_ID_KEY: val.class_id,
+        }
+        for instance in val.instances:
+            data[instance.instance_id] = self._instance_to_dict(device_id,
+                                                                val.class_id,
+                                                                instance)
+        return data
+
+    def _device_to_dict(self, val):
+        if not isinstance(val, MibDeviceData):
+            raise TypeError('{} is not of type MibDeviceData'.format(type(val)))
+
+        data = {
+            DEVICE_ID_KEY: val.device_id,
+            CREATED_KEY: self._string_to_time(val.created),
+            LAST_SYNC_KEY: self._string_to_time(val.last_sync_time),
+            MDS_KEY: val.mib_data_sync,
+            VERSION_KEY: val.version,
+            ME_KEY: dict(),
+            MSG_TYPE_KEY: set()
+        }
+        for class_data in val.classes:
+            data[class_data.class_id] = self._class_to_dict(val.device_id,
+                                                            class_data)
+        for managed_entity in val.managed_entities:
+            data[ME_KEY][managed_entity.class_id] = managed_entity.name
+
+        for msg_type in val.message_types:
+            data[MSG_TYPE_KEY].add(msg_type.message_type)
+
+        return data
+
+    def _managed_entity_to_name(self, device_id, class_id):
+        me_map = self._omci_agent.get_device(device_id).me_map
+        entity = me_map.get(class_id)
+
+        return entity.__name__ if entity is not None else 'UnknownManagedEntity'
+
+    def update_supported_managed_entities(self, device_id, managed_entities):
+        """
+        Update the supported OMCI Managed Entities for this device
+        :param device_id: (str) ONU Device ID
+        :param managed_entities: (set) Managed Entity class IDs
+        """
+        try:
+            me_list = [ManagedEntity(class_id=class_id,
+                                     name=self._managed_entity_to_name(device_id,
+                                                                       class_id))
+                       for class_id in managed_entities]
+
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+
+            now = datetime.utcnow()
+            data.managed_entities.extend(me_list)
+
+            # Update
+            self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('save-me-list-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('add-me-failure', e=e, me_list=managed_entities)
+            raise
+
+    def update_supported_message_types(self, device_id, msg_types):
+        """
+        Update the supported OMCI Managed Entities for this device
+        :param device_id: (str) ONU Device ID
+        :param msg_types: (set) Message Type values (ints)
+        """
+        try:
+            msg_type_list = [MessageType(message_type=msg_type.value)
+                             for msg_type in msg_types]
+
+            device_proxy = self._device_proxy(device_id)
+            data = device_proxy.get(depth=0)
+
+            now = datetime.utcnow()
+            data.message_types.extend(msg_type_list)
+
+            # Update
+            self._root_proxy.update(MibDbExternal.DEVICE_PATH.format(device_id),
+                                    data)
+            self._modified = now
+            self.log.debug('save-msg-types-complete', device_id=device_id)
+
+        except Exception as e:
+            self.log.exception('add-msg-types-failure', e=e, msg_types=msg_types)
+            raise
diff --git a/python/extensions/omci/me_frame.py b/python/extensions/omci/me_frame.py
new file mode 100644
index 0000000..1724100
--- /dev/null
+++ b/python/extensions/omci/me_frame.py
@@ -0,0 +1,478 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""
+OMCI Managed Entity Message support base class
+"""
+from voltha.extensions.omci.omci import *
+
+# abbreviations
+OP = EntityOperations
+AA = AttributeAccess
+
+
+class MEFrame(object):
+    """Base class to help simplify Frame Creation"""
+    def __init__(self, entity_class, entity_id, data):
+        assert issubclass(entity_class, EntityClass), \
+            "'{}' must be a subclass of MEFrame".format(entity_class)
+        self.check_type(entity_id, int)
+
+        if not 0 <= entity_id <= 0xFFFF:
+            raise ValueError('entity_id should be 0..65535')
+
+        self.log = structlog.get_logger()
+        self._class = entity_class
+        self._entity_id = entity_id
+        self.data = data
+
+    def __str__(self):
+        return '{}: Entity_ID: {}, Data: {}'.\
+            format(self.entity_class_name, self._entity_id, self.data)
+
+    def __repr__(self):
+        return str(self)
+
+    @property
+    def entity_class(self):
+        """
+        The Entity Class for this ME
+        :return: (EntityClass) Entity class
+        """
+        return self._class
+
+    @property
+    def entity_class_name(self):
+        return self._class.__name__
+
+    @property
+    def entity_id(self):
+        """
+        The Entity ID for this ME frame
+        :return: (int) Entity ID (0..0xFFFF)
+        """
+        return self._entity_id
+
+    @staticmethod
+    def check_type(param, types):
+        if not isinstance(param, types):
+            raise TypeError("Parameter '{}' should be a {}".format(param, types))
+
+    def _check_operation(self, operation):
+        allowed = self.entity_class.mandatory_operations | self.entity_class.optional_operations
+        assert operation in allowed, "{} not allowed for '{}'".format(operation.name,
+                                                                      self.entity_class_name)
+
+    def _check_attributes(self, attributes, access):
+        keys = attributes.keys() if isinstance(attributes, dict) else attributes
+        for attr_name in keys:
+            # Bad attribute name (invalid or spelling error)?
+            index = self.entity_class.attribute_name_to_index_map.get(attr_name)
+            if index is None:
+                raise KeyError("Attribute '{}' is not valid for '{}'".
+                               format(attr_name, self.entity_class_name))
+            # Invalid access?
+            assert access in self.entity_class.attributes[index].access, \
+                "Access '{}' for attribute '{}' is not valid for '{}'".format(access.name,
+                                                                              attr_name,
+                                                                              self.entity_class_name)
+
+        if access.value in [AA.W.value, AA.SBC.value] and isinstance(attributes, dict):
+            for attr_name, value in attributes.iteritems():
+                index = self.entity_class.attribute_name_to_index_map.get(attr_name)
+                attribute = self.entity_class.attributes[index]
+                if not attribute.valid(value):
+                    raise ValueError("Invalid value '{}' for attribute '{}' of '{}".
+                                     format(value, attr_name, self.entity_class_name))
+
+    @staticmethod
+    def _attr_to_data(attributes):
+        """
+        Convert an object into the 'data' set or dictionary for get/set/create/delete
+        requests.
+
+        This method takes a 'string', 'list', or 'set' for get requests and
+        converts it to a 'set' of attributes.
+
+        For create/set requests a dictionary of attribute/value pairs is required
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, set, or dict can be provided. For create/set
+                           operations, a dictionary should be provided. For delete
+                           the attributes may be None since they are ignored.
+
+        :return: (set, dict) set for get/deletes, dict for create/set
+        """
+        if isinstance(attributes, basestring):
+            # data = [str(attributes)]
+            data = set()
+            data.add(str(attributes))
+
+        elif isinstance(attributes, list):
+            assert all(isinstance(attr, basestring) for attr in attributes),\
+                'attribute list must be strings'
+            data = {str(attr) for attr in attributes}
+            assert len(data) == len(attributes), 'Attributes were not unique'
+
+        elif isinstance(attributes, set):
+            assert all(isinstance(attr, basestring) for attr in attributes),\
+                'attribute set must be strings'
+            data = {str(attr) for attr in attributes}
+
+        elif isinstance(attributes, (dict, type(None))):
+            data = attributes
+
+        else:
+            raise TypeError("Unsupported attributes type '{}'".format(type(attributes)))
+
+        return data
+
+    def create(self):
+        """
+        Create a Create request frame for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        assert hasattr(self.entity_class, 'class_id'), 'class_id required for Create actions'
+        assert hasattr(self, 'entity_id'), 'entity_id required for Create actions'
+        assert hasattr(self, 'data'), 'data required for Create actions'
+
+        data = getattr(self, 'data')
+        MEFrame.check_type(data, dict)
+        assert len(data) > 0, 'No attributes supplied'
+
+        self._check_operation(OP.Create)
+        self._check_attributes(data, AA.Writable)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciCreate.message_id,
+            omci_message=OmciCreate(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                data=data
+            ))
+
+    def delete(self):
+        """
+        Create a Delete request frame for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.Delete)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciDelete.message_id,
+            omci_message=OmciDelete(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id')
+            ))
+
+    def set(self):
+        """
+        Create a Set request frame for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        assert hasattr(self, 'data'), 'data required for Set actions'
+        data = getattr(self, 'data')
+        MEFrame.check_type(data, dict)
+        assert len(data) > 0, 'No attributes supplied'
+
+        self._check_operation(OP.Set)
+        self._check_attributes(data, AA.Writable)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciSet.message_id,
+            omci_message=OmciSet(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                attributes_mask=self.entity_class.mask_for(*data.keys()),
+                data=data
+            ))
+
+    def get(self):
+        """
+        Create a Get request frame for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        assert hasattr(self, 'data'), 'data required for Get actions'
+        data = getattr(self, 'data')
+        MEFrame.check_type(data, (list, set, dict))
+        assert len(data) > 0, 'No attributes supplied'
+
+        mask_set = data.keys() if isinstance(data, dict) else data
+
+        self._check_operation(OP.Get)
+        self._check_attributes(mask_set, AA.Readable)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciGet.message_id,
+            omci_message=OmciGet(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                attributes_mask=self.entity_class.mask_for(*mask_set)
+            ))
+
+    def reboot(self, reboot_code=0):
+        """
+        Create a Reboot request from for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.Reboot)
+        assert 0 <= reboot_code <= 2, 'Reboot code must be 0..2'
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciReboot.message_id,
+            omci_message=OmciReboot(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                reboot_code=reboot_code
+            ))
+
+    def mib_reset(self):
+        """
+        Create a MIB Reset request from for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.MibReset)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciMibReset.message_id,
+            omci_message=OmciMibReset(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id')
+            ))
+
+    def mib_upload(self):
+        """
+        Create a MIB Upload request from for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.MibUpload)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciMibUpload.message_id,
+            omci_message=OmciMibUpload(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id')
+            ))
+
+    def mib_upload_next(self):
+        """
+        Create a MIB Upload Next request from for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        assert hasattr(self, 'data'), 'data required for Set actions'
+        data = getattr(self, 'data')
+        MEFrame.check_type(data, dict)
+        assert len(data) > 0, 'No attributes supplied'
+        assert 'mib_data_sync' in data, "'mib_data_sync' not in attributes list"
+
+        self._check_operation(OP.MibUploadNext)
+        self._check_attributes(data, AA.Writable)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciMibUploadNext.message_id,
+            omci_message=OmciMibUploadNext(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                command_sequence_number=data['mib_data_sync']
+            ))
+
+    def get_next(self):
+        """
+        Create a Get Next request frame for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        assert hasattr(self, 'data'), 'data required for Get Next actions'
+        data = getattr(self, 'data')
+        MEFrame.check_type(data, dict)
+        assert len(data) == 1, 'Only one attribute should be specified'
+
+        mask_set = data.keys() if isinstance(data, dict) else data
+
+        self._check_operation(OP.GetNext)
+        self._check_attributes(mask_set, AA.Readable)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciGetNext.message_id,
+            omci_message=OmciGetNext(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                attributes_mask=self.entity_class.mask_for(*mask_set),
+                command_sequence_number=data.values()[0]
+            ))
+
+    def synchronize_time(self, time=None):
+        """
+        Create a Synchronize Time request from for this ME
+        :param time: (DateTime) Time to set to. If none, use UTC
+        :return: (OmciFrame) OMCI Frame
+        """
+        from datetime import datetime
+        self._check_operation(OP.SynchronizeTime)
+        dt = time or datetime.utcnow()
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciSynchronizeTime.message_id,
+            omci_message=OmciSynchronizeTime(
+                    entity_class=getattr(self.entity_class, 'class_id'),
+                    entity_id=getattr(self, 'entity_id'),
+                    year=dt.year,
+                    month=dt.month,
+                    hour=dt.hour,
+                    minute=dt.minute,
+                    second=dt.second,
+            ))
+
+    def get_all_alarm(self, alarm_retrieval_mode):
+        """
+        Create a Alarm request from for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.GetAllAlarms)
+        assert 0 <= alarm_retrieval_mode <= 1, 'Alarm retrieval mode must be 0..1'
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciGetAllAlarms.message_id,
+            omci_message=OmciGetAllAlarms(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                alarm_retrieval_mode=alarm_retrieval_mode
+            ))
+
+    def get_all_alarm_next(self, command_sequence_number):
+        """
+        Create a Alarm request from for this ME
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.GetAllAlarmsNext)
+
+        return OmciFrame(
+            transaction_id=None,
+            message_type=OmciGetAllAlarmsNext.message_id,
+            omci_message=OmciGetAllAlarmsNext(
+                entity_class=getattr(self.entity_class, 'class_id'),
+                entity_id=getattr(self, 'entity_id'),
+                command_sequence_number=command_sequence_number
+            ))
+
+    def start_software_download(self, image_size, window_size):
+        """
+        Create Start Software Download message
+        :return: (OmciFrame) OMCI Frame
+        """
+        self.log.debug("--> start_software_download")
+        self._check_operation(OP.StartSoftwareDownload)
+        return OmciFrame(
+	            transaction_id=None,
+	            message_type=OmciStartSoftwareDownload.message_id,
+	            omci_message=OmciStartSoftwareDownload(
+	                entity_class=getattr(self.entity_class, 'class_id'),
+	                entity_id=getattr(self, 'entity_id'),
+	                window_size=window_size,
+	                image_size=image_size,
+	                instance_id=getattr(self, 'entity_id')
+	           ))
+        
+    def end_software_download(self, crc32, image_size):
+        """
+        Create End Software Download message
+        :return: (OmciFrame) OMCI Frame
+        """
+        self._check_operation(OP.EndSoftwareDownload)
+        return OmciFrame(
+	            transaction_id=None,
+	            message_type=OmciEndSoftwareDownload.message_id,
+	            omci_message=OmciEndSoftwareDownload(
+	                entity_class=getattr(self.entity_class, 'class_id'),
+	                entity_id=getattr(self, 'entity_id'),
+	                crc32=crc32,
+	                image_size=image_size,
+	                instance_id=getattr(self, 'entity_id')
+	           ))
+    
+    def download_section(self, is_last_section, section_number, data):
+        """
+        Create Download Section message
+        :is_last_section: (bool) indicate the last section in the window
+        :section_num    : (int)  current section number
+        :data           : (byte) data to be sent in the section
+        :return: (OmciFrame) OMCI Frame
+        """
+        self.log.debug("--> download_section: ", section_number=section_number)
+        
+        self._check_operation(OP.DownloadSection)
+        if is_last_section:
+            return OmciFrame(
+                    transaction_id=None,
+                    message_type=OmciDownloadSectionLast.message_id,
+                    omci_message=OmciDownloadSectionLast(
+                        entity_class=getattr(self.entity_class, 'class_id'),
+                        entity_id=getattr(self, 'entity_id'),
+                        section_number=section_number,
+                        data=data
+                   ))
+        else:
+            return OmciFrame(
+                    transaction_id=None,
+                    message_type=OmciDownloadSection.message_id,
+                    omci_message=OmciDownloadSection(
+                        entity_class=getattr(self.entity_class, 'class_id'),
+                        entity_id=getattr(self, 'entity_id'),
+                        section_number=section_number,
+                        data=data
+                   ))
+
+    def activate_image(self, activate_flag=0):
+        """
+        Activate Image message
+        :activate_flag: 00	Activate image unconditionally
+                        01	Activate image only if no POTS/VoIP calls are in progress
+                        10	Activate image only if no emergency call is in progress
+        :return: (OmciFrame) OMCI Frame
+        """
+        self.log.debug("--> activate_image", entity=self.entity_id, flag=activate_flag)
+        return OmciFrame(
+                transaction_id=None,
+                message_type=OmciActivateImage.message_id,
+                omci_message=OmciActivateImage(
+                    entity_class=getattr(self.entity_class, 'class_id'),
+                    entity_id=getattr(self, 'entity_id'),
+                    activate_flag=activate_flag
+               ))
+
+    def commit_image(self):
+        """
+        Commit Image message
+        :return: (OmciFrame) OMCI Frame
+        """
+        self.log.debug("--> commit_image", entity=self.entity_id)
+        return OmciFrame(
+                transaction_id=None,
+                message_type=OmciCommitImage.message_id,
+                omci_message=OmciCommitImage(
+                    entity_class=getattr(self.entity_class, 'class_id'),
+                    entity_id=getattr(self, 'entity_id'),
+               ))
+    
diff --git a/python/extensions/omci/omci.py b/python/extensions/omci/omci.py
new file mode 100644
index 0000000..5a94146
--- /dev/null
+++ b/python/extensions/omci/omci.py
@@ -0,0 +1,23 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Omci message generator and parser implementation using scapy
+"""
+
+from omci_frame import OmciFrame
+from omci_messages import *
+from omci_entities import *
diff --git a/python/extensions/omci/omci_cc.py b/python/extensions/omci/omci_cc.py
new file mode 100644
index 0000000..7d4d304
--- /dev/null
+++ b/python/extensions/omci/omci_cc.py
@@ -0,0 +1,1047 @@
+#
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""
+OMCI Message support
+"""
+
+import sys
+import arrow
+from twisted.internet import reactor, defer
+from twisted.internet.defer import TimeoutError, CancelledError, failure, fail, succeed, inlineCallbacks
+from common.frameio.frameio import hexify
+from voltha.extensions.omci.omci import *
+from voltha.extensions.omci.omci_me import OntGFrame, OntDataFrame, SoftwareImageFrame
+from voltha.extensions.omci.me_frame import MEFrame
+from voltha.extensions.omci.omci_defs import EntityOperations, ReasonCodes
+from common.event_bus import EventBusClient
+from enum import IntEnum
+from binascii import hexlify
+
+
+def hexify(buffer):
+    """Return a hexadecimal string encoding of input buffer"""
+    return ''.join('%02x' % ord(c) for c in buffer)
+
+
+DEFAULT_OMCI_TIMEOUT = 3                           # Seconds
+MAX_OMCI_REQUEST_AGE = 60                          # Seconds
+DEFAULT_OMCI_DOWNLOAD_SECTION_SIZE = 31            # Bytes
+MAX_TABLE_ROW_COUNT = 512                          # Keep get-next logic reasonable
+
+CONNECTED_KEY = 'connected'
+TX_REQUEST_KEY = 'tx-request'
+RX_RESPONSE_KEY = 'rx-response'
+UNKNOWN_CLASS_ATTRIBUTE_KEY = 'voltha-unknown-blob'
+
+
+class OmciCCRxEvents(IntEnum):
+    AVC_Notification = 0,
+    MIB_Upload = 1,
+    MIB_Upload_Next = 2,
+    Create = 3,
+    Delete = 4,
+    Set = 5,
+    Alarm_Notification = 6,
+    Test_Result = 7,
+    MIB_Reset = 8,
+    Connectivity = 9,
+    Get_ALARM_Get = 10,
+    Get_ALARM_Get_Next = 11
+
+
+# abbreviations
+OP = EntityOperations
+RxEvent = OmciCCRxEvents
+
+
+class OMCI_CC(object):
+    """ Handle OMCI Communication Channel specifics for Adtran ONUs"""
+
+    MIN_OMCI_TX_ID_LOW_PRIORITY = 0x0001  # 2 Octets max
+    MAX_OMCI_TX_ID_LOW_PRIORITY = 0x7FFF  # 2 Octets max
+    MIN_OMCI_TX_ID_HIGH_PRIORITY = 0x8000  # 2 Octets max
+    MAX_OMCI_TX_ID_HIGH_PRIORITY = 0xFFFF  # 2 Octets max
+    LOW_PRIORITY = 0
+    HIGH_PRIORITY = 1
+
+    # Offset into some tuples for pending lists and tx in progress
+    PENDING_DEFERRED = 0
+    PENDING_FRAME = 1
+    PENDING_TIMEOUT = 2
+    PENDING_RETRY = 3
+
+    REQUEST_TIMESTAMP = 0
+    REQUEST_DEFERRED = 1
+    REQUEST_FRAME = 2
+    REQUEST_TIMEOUT = 3
+    REQUEST_RETRY = 4
+    REQUEST_DELAYED_CALL = 5
+
+    _frame_to_event_type = {
+        OmciMibResetResponse.message_id: RxEvent.MIB_Reset,
+        OmciMibUploadResponse.message_id: RxEvent.MIB_Upload,
+        OmciMibUploadNextResponse.message_id: RxEvent.MIB_Upload_Next,
+        OmciCreateResponse.message_id: RxEvent.Create,
+        OmciDeleteResponse.message_id: RxEvent.Delete,
+        OmciSetResponse.message_id: RxEvent.Set,
+        OmciGetAllAlarmsResponse.message_id: RxEvent.Get_ALARM_Get,
+        OmciGetAllAlarmsNextResponse.message_id: RxEvent.Get_ALARM_Get_Next
+    }
+
+    def __init__(self, adapter_agent, device_id, me_map=None,
+                 clock=None):
+        self.log = structlog.get_logger(device_id=device_id)
+        self._adapter_agent = adapter_agent
+        self._device_id = device_id
+        self._proxy_address = None
+        self._enabled = False
+        self._extended_messaging = False
+        self._me_map = me_map
+        if clock is None:
+            self.reactor = reactor
+        else:
+            self.reactor = clock
+
+        # Support 2 levels of priority since only baseline message set supported
+        self._tx_tid = [OMCI_CC.MIN_OMCI_TX_ID_LOW_PRIORITY, OMCI_CC.MIN_OMCI_TX_ID_HIGH_PRIORITY]
+        self._tx_request = [None, None]    # Tx in progress (timestamp, defer, frame, timeout, retry, delayedCall)
+        self._tx_request_deferred = [None, None]    # Tx in progress but held till child Rx/TX can finish. ie omci tables.
+        self._pending = [list(), list()]   # pending queue (deferred, tx_frame, timeout, retry)
+        self._rx_response = [None, None]
+
+        # Statistics
+        self._tx_frames = 0
+        self._rx_frames = 0
+        self._rx_unknown_tid = 0      # Rx OMCI with no Tx TID match
+        self._rx_onu_frames = 0       # Autonomously generated ONU frames
+        self._rx_onu_discards = 0     # Autonomously generated ONU unknown message types
+        self._rx_timeouts = 0
+        self._rx_late = 0             # Frame response received after timeout on Tx
+        self._rx_unknown_me = 0       # Number of managed entities Rx without a decode definition
+        self._tx_errors = 0           # Exceptions during tx request
+        self._consecutive_errors = 0  # Rx & Tx errors in a row, a good RX resets this to 0
+        self._reply_min = sys.maxint  # Fastest successful tx -> rx
+        self._reply_max = 0           # Longest successful tx -> rx
+        self._reply_sum = 0.0         # Total seconds for successful tx->rx (float for average)
+        self._max_hp_tx_queue = 0     # Maximum size of high priority tx pending queue
+        self._max_lp_tx_queue = 0     # Maximum size of low priority tx pending queue
+
+        self.event_bus = EventBusClient()
+
+        # If a list of custom ME Entities classes were provided, insert them into
+        # main class_id to entity map.
+        # TODO: If this class becomes hidden from the ONU DA, move this to the OMCI State Machine runner
+
+    def __str__(self):
+        return "OMCISupport: {}".format(self._device_id)
+
+    def _get_priority_index(self, high_priority):
+        """ Centralized logic to help make extended message support easier in the future"""
+        return OMCI_CC.HIGH_PRIORITY if high_priority and not self._extended_messaging \
+            else OMCI_CC.LOW_PRIORITY
+
+    def _tid_is_high_priority(self, tid):
+        """ Centralized logic to help make extended message support easier in the future"""
+
+        return not self._extended_messaging and \
+            OMCI_CC.MIN_OMCI_TX_ID_HIGH_PRIORITY <= tid <= OMCI_CC.MAX_OMCI_TX_ID_HIGH_PRIORITY
+
+    @staticmethod
+    def event_bus_topic(device_id, event):
+        """
+        Get the topic name for a given event Frame Type
+        :param device_id: (str) ONU Device ID
+        :param event: (OmciCCRxEvents) Type of event
+        :return: (str) Topic string
+        """
+        assert event in OmciCCRxEvents, \
+            'Event {} is not an OMCI-CC Rx Event'.format(event.name)
+
+        return 'omci-rx:{}:{}'.format(device_id, event.name)
+
+    @property
+    def enabled(self):
+        return self._enabled
+
+    @enabled.setter
+    def enabled(self, value):
+        """
+        Enable/disable the OMCI Communications Channel
+
+        :param value: (boolean) True to enable, False to disable
+        """
+        assert isinstance(value, bool), 'enabled is a boolean'
+
+        if self._enabled != value:
+            self._enabled = value
+            if self._enabled:
+                self._start()
+            else:
+                self._stop()
+
+    @property
+    def tx_frames(self):
+        return self._tx_frames
+
+    @property
+    def rx_frames(self):
+        return self._rx_frames
+
+    @property
+    def rx_unknown_tid(self):
+        return self._rx_unknown_tid         # Tx TID not found
+
+    @property
+    def rx_unknown_me(self):
+        return self._rx_unknown_me
+
+    @property
+    def rx_onu_frames(self):
+        return self._rx_onu_frames
+
+    @property
+    def rx_onu_discards(self):
+        return self._rx_onu_discards        # Attribute Value change autonomous overflows
+
+    @property
+    def rx_timeouts(self):
+        return self._rx_timeouts
+
+    @property
+    def rx_late(self):
+        return self._rx_late
+
+    @property
+    def tx_errors(self):
+        return self._tx_errors
+
+    @property
+    def consecutive_errors(self):
+        return self._consecutive_errors
+
+    @property
+    def reply_min(self):
+        return int(round(self._reply_min * 1000.0))     # Milliseconds
+
+    @property
+    def reply_max(self):
+        return int(round(self._reply_max * 1000.0))     # Milliseconds
+
+    @property
+    def reply_average(self):
+        avg = self._reply_sum / self._rx_frames if self._rx_frames > 0 else 0.0
+        return int(round(avg * 1000.0))     # Milliseconds
+
+    @property
+    def hp_tx_queue_len(self):
+        return len(self._pending[OMCI_CC.HIGH_PRIORITY])
+
+    @property
+    def lp_tx_queue_len(self):
+        return len(self._pending[OMCI_CC.LOW_PRIORITY])
+
+    @property
+    def max_hp_tx_queue(self):
+        return self._max_hp_tx_queue
+
+    @property
+    def max_lp_tx_queue(self):
+        return self._max_lp_tx_queue
+
+    def _start(self):
+        """
+        Start the OMCI Communications Channel
+        """
+        assert self._enabled, 'Start should only be called if enabled'
+        self.flush()
+
+        device = self._adapter_agent.get_device(self._device_id)
+        self._proxy_address = device.proxy_address
+
+    def _stop(self):
+        """
+        Stop the OMCI Communications Channel
+        """
+        assert not self._enabled, 'Stop should only be called if disabled'
+        self.flush()
+        self._proxy_address = None
+
+    def _receive_onu_message(self, rx_frame):
+        """ Autonomously generated ONU frame Rx handler"""
+        self.log.debug('rx-onu-frame', frame_type=type(rx_frame),
+                       frame=hexify(str(rx_frame)))
+
+        msg_type = rx_frame.fields['message_type']
+        self._rx_onu_frames += 1
+
+        msg = {TX_REQUEST_KEY: None,
+               RX_RESPONSE_KEY: rx_frame}
+
+        if msg_type == EntityOperations.AlarmNotification.value:
+            topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.Alarm_Notification)
+            self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
+
+        elif msg_type == EntityOperations.AttributeValueChange.value:
+            topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.AVC_Notification)
+            self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
+
+        elif msg_type == EntityOperations.TestResult.value:
+            topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.Test_Result)
+            self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
+
+        else:
+            self.log.warn('onu-unsupported-autonomous-message', type=msg_type)
+            self._rx_onu_discards += 1
+
+    def _update_rx_tx_stats(self, now, ts):
+        ts_diff = now - arrow.Arrow.utcfromtimestamp(ts)
+        secs = ts_diff.total_seconds()
+        self._reply_sum += secs
+        if secs < self._reply_min:
+            self._reply_min = secs
+        if secs > self._reply_max:
+            self._reply_max = secs
+        return secs
+
+    def receive_message(self, msg):
+        """
+        Receive and OMCI message from the proxy channel to the OLT.
+
+        Call this from your ONU Adapter on a new OMCI Rx on the proxy channel
+        :param msg: (str) OMCI binary message (used as input to Scapy packet decoder)
+        """
+        if not self.enabled:
+            return
+
+        try:
+            now = arrow.utcnow()
+            d = None
+
+            # NOTE: Since we may need to do an independent ME map on a per-ONU basis
+            #       save the current value of the entity_id_to_class_map, then
+            #       replace it with our custom one before decode, and then finally
+            #       restore it later. Tried other ways but really made the code messy.
+            saved_me_map = omci_entities.entity_id_to_class_map
+            omci_entities.entity_id_to_class_map = self._me_map
+
+            try:
+                rx_frame = msg if isinstance(msg, OmciFrame) else OmciFrame(msg)
+                rx_tid = rx_frame.fields['transaction_id']
+
+                if rx_tid == 0:
+                    return self._receive_onu_message(rx_frame)
+
+                # Previously unreachable if this is the very first Rx or we
+                # have been running consecutive errors
+                if self._rx_frames == 0 or self._consecutive_errors != 0:
+                    self.reactor.callLater(0, self._publish_connectivity_event, True)
+
+                self._rx_frames += 1
+                self._consecutive_errors = 0
+
+            except KeyError as e:
+                # Unknown, Unsupported, or vendor-specific ME. Key is the unknown classID
+                self.log.debug('frame-decode-key-error', msg=hexlify(msg), e=e)
+                rx_frame = self._decode_unknown_me(msg)
+                self._rx_unknown_me += 1
+                rx_tid = rx_frame.fields.get('transaction_id')
+
+            except Exception as e:
+                self.log.exception('frame-decode', msg=hexlify(msg), e=e)
+                return
+
+            finally:
+                omci_entities.entity_id_to_class_map = saved_me_map     # Always restore it.
+
+            try:
+                high_priority = self._tid_is_high_priority(rx_tid)
+                index = self._get_priority_index(high_priority)
+
+                # (timestamp, defer, frame, timeout, retry, delayedCall)
+                last_tx_tuple = self._tx_request[index]
+
+                if last_tx_tuple is None or \
+                        last_tx_tuple[OMCI_CC.REQUEST_FRAME].fields.get('transaction_id') != rx_tid:
+                    # Possible late Rx on a message that timed-out
+                    self._rx_unknown_tid += 1
+                    #self.log.warn('tx-message-missing', rx_id=rx_tid, msg=hexlify(msg))
+                    #return
+
+                ts, d, tx_frame, timeout, retry, dc = last_tx_tuple
+                if dc is not None and not dc.cancelled and not dc.called:
+                    dc.cancel()
+                    # self.log.debug("cancel-timeout-called")
+
+                secs = self._update_rx_tx_stats(now, ts)
+
+                # Late arrival already serviced by a timeout?
+                if d.called:
+                    self._rx_late += 1
+                    return
+
+            except Exception as e:
+                self.log.exception('frame-match', msg=hexlify(msg), e=e)
+                if d is not None:
+                    return d.errback(failure.Failure(e))
+                return
+
+            # Extended processing needed. Note 'data' field will be None on some error
+            # status returns
+            omci_msg = rx_frame.fields['omci_message']
+
+            if isinstance(omci_msg, OmciGetResponse) and \
+                    omci_msg.fields.get('data') is not None and \
+                    'table_attribute_mask' in omci_msg.fields['data']:
+                # Yes, run in a separate generator
+                reactor.callLater(0, self._process_get_rx_frame, timeout, secs,
+                                  rx_frame, d, tx_frame, high_priority)
+            else:
+                # Publish Rx event to listeners in a different task
+                reactor.callLater(0, self._publish_rx_frame, tx_frame, rx_frame)
+
+                # begin success callback chain (will cancel timeout and queue next Tx message)
+                from copy import copy
+                original_callbacks = copy(d.callbacks)
+                self._rx_response[index] = rx_frame
+                d.callback(rx_frame)
+
+        except Exception as e:
+            self.log.exception('rx-msg', e=e)
+
+    @inlineCallbacks
+    def _process_get_rx_frame(self, timeout, secs, rx_frame, d, tx_frame, high_priority):
+        """
+        Special handling for Get Requests that may require additional 'get_next' operations
+        if a table attribute was requested.
+        """
+        omci_msg = rx_frame.fields['omci_message']
+        rx_tid = rx_frame.fields.get('transaction_id')
+        high_priority = self._tid_is_high_priority(rx_tid)
+        frame_index = self._get_priority_index(high_priority)
+
+        if isinstance(omci_msg, OmciGetResponse) and 'table_attribute_mask' in omci_msg.fields['data']:
+
+            # save tx request for later so that below send/recv can finish
+            self._tx_request_deferred[frame_index] = self._tx_request[frame_index]
+            self._tx_request[frame_index] = None
+
+            try:
+                entity_class = omci_msg.fields['entity_class']
+                entity_id = omci_msg.fields['entity_id']
+                table_attributes = omci_msg.fields['data']['table_attribute_mask']
+
+                # Table attribute mask is encoded opposite of managed entity mask.
+                if entity_class in self._me_map:
+                    ec = self._me_map[entity_class]
+                    for index in xrange(1, len(ec.attributes) + 1):
+                        attr_mask = 1 << index
+
+                        if attr_mask & table_attributes:
+                            self.log.debug('omcc-get-table-ec', ec=ec, index=index, attr_mask=attr_mask,
+                                           table_attributes=table_attributes)
+                            eca = ec.attributes[index]
+                            self.log.debug('omcc-get-table-attribute', table_name=eca.field.name)
+
+                            seq_no = 0
+                            data_buffer = ''
+                            count = omci_msg.fields['data'][eca.field.name + '_size']
+
+                            if count > MAX_TABLE_ROW_COUNT:
+                                self.log.error('omcc-get-table-huge', count=count, name=eca.field.name)
+                                raise ValueError('Huge Table Size: {}'.format(count))
+
+                            # Original timeout must be chopped up into each individual get-next request
+                            # in order for total transaction to complete within the timeframe of the
+                            # original get() timeout.
+                            number_transactions = 1 + (count + OmciTableField.PDU_SIZE - 1) / OmciTableField.PDU_SIZE
+                            timeout /= (1 + number_transactions)
+
+                            # Start the loop
+                            vals = []
+                            for offset in xrange(0, count, OmciTableField.PDU_SIZE):
+                                frame = MEFrame(ec, entity_id, {eca.field.name: seq_no}).get_next()
+                                seq_no += 1
+
+                                max_retries = 3
+                                results = yield self.send(frame, min(timeout / max_retries, secs * 3), max_retries)
+
+                                omci_getnext_msg = results.fields['omci_message']
+                                status = omci_getnext_msg.fields['success_code']
+
+                                if status != ReasonCodes.Success.value:
+                                    raise Exception('get-next-failure table=' + eca.field.name +
+                                                    ' entity_id=' + str(entity_id) +
+                                                    ' sqn=' + str(seq_no) + ' omci-status ' + str(status))
+
+                                # Extract the data
+                                num_octets = count - offset
+                                if num_octets > OmciTableField.PDU_SIZE:
+                                    num_octets = OmciTableField.PDU_SIZE
+
+                                data = omci_getnext_msg.fields['data'][eca.field.name]
+                                data_buffer += data[:num_octets]
+
+                            while data_buffer:
+                                data_buffer, val = eca.field.getfield(None, data_buffer)
+                                vals.append(val)
+
+                            omci_msg.fields['data'][eca.field.name] = vals
+                            del omci_msg.fields['data'][eca.field.name + '_size']
+                            self.log.debug('omcc-got-table-attribute-rows', table_name=eca.field.name,
+                                           row_count=len(vals))
+                del omci_msg.fields['data']['table_attribute_mask']
+
+            except Exception as e:
+                self.log.exception('get-next-error', e=e)
+                self._tx_request_deferred[frame_index] = None
+                d.errback(failure.Failure(e), high_priority)
+                return
+
+            except IndexError as e:
+                self.log.exception('get-next-index-error', e=e)
+                self._tx_request_deferred[frame_index] = None
+                d.errback(failure.Failure(e), high_priority)
+                return
+
+            # Put it back so the outer Rx/Tx can finish
+            self._tx_request[frame_index] = self._tx_request_deferred[frame_index]
+            self._tx_request_deferred[frame_index] = None
+
+        # Publish Rx event to listeners in a different task
+        if not isinstance(omci_msg, OmciGetNextResponse):
+            reactor.callLater(0, self._publish_rx_frame, tx_frame, rx_frame)
+
+        from copy import copy
+        original_callbacks = copy(d.callbacks)
+        self._rx_response[frame_index] = rx_frame
+        d.callback(rx_frame)
+        self.log.debug("finished-processing-get-rx-frame")
+
+    def _decode_unknown_me(self, msg):
+        """
+        Decode an ME for an unsupported class ID.  This should only occur for a subset
+        of message types (Get, Set, MIB Upload Next, ...) and they should only be
+        responses as well.
+
+        There are some times below that are commented out. For VOLTHA 2.0, it is
+        expected that any get, set, create, delete for unique (often vendor) MEs
+        will be coded by the ONU utilizing it and supplied to OpenOMCI as a
+        vendor-specific ME during device initialization.
+
+        :param msg: (str) Binary data
+        :return: (OmciFrame) resulting frame
+        """
+        from struct import unpack
+
+        (tid, msg_type, framing) = unpack('!HBB', msg[0:4])
+
+        assert framing == 0xa, 'Only basic OMCI framing supported at this time'
+        msg = msg[4:]
+
+        # TODO: Commented out items below are future work (not expected for VOLTHA v2.0)
+        (msg_class, kwargs) = {
+            # OmciCreateResponse.message_id: (OmciCreateResponse, None),
+            # OmciDeleteResponse.message_id: (OmciDeleteResponse, None),
+            # OmciSetResponse.message_id: (OmciSetResponse, None),
+            # OmciGetResponse.message_id: (OmciGetResponse, None),
+            # OmciGetAllAlarmsNextResponse.message_id: (OmciGetAllAlarmsNextResponse, None),
+            OmciMibUploadNextResponse.message_id: (OmciMibUploadNextResponse,
+                                                   {
+                                                       'entity_class': unpack('!H', msg[0:2])[0],
+                                                       'entity_id': unpack('!H', msg[2:4])[0],
+                                                       'object_entity_class': unpack('!H', msg[4:6])[0],
+                                                       'object_entity_id': unpack('!H', msg[6:8])[0],
+                                                       'object_attributes_mask': unpack('!H', msg[8:10])[0],
+                                                       'object_data': {
+                                                           UNKNOWN_CLASS_ATTRIBUTE_KEY: hexlify(msg[10:-4])
+                                                       },
+                                                   }),
+            # OmciAlarmNotification.message_id: (OmciAlarmNotification, None),
+            OmciAttributeValueChange.message_id: (OmciAttributeValueChange,
+                                                   {
+                                                       'entity_class': unpack('!H', msg[0:2])[0],
+                                                       'entity_id': unpack('!H', msg[2:4])[0],
+                                                       'data': {
+                                                           UNKNOWN_CLASS_ATTRIBUTE_KEY: hexlify(msg[4:-8])
+                                                       },
+                                                   }),
+            # OmciTestResult.message_id: (OmciTestResult, None),
+        }.get(msg_type, None)
+
+        if msg_class is None:
+            raise TypeError('Unsupport Message Type for Unknown Decode: {}',
+                            msg_type)
+
+        return OmciFrame(transaction_id=tid, message_type=msg_type,
+                         omci_message=msg_class(**kwargs))
+
+    def _publish_rx_frame(self, tx_frame, rx_frame):
+        """
+        Notify listeners of successful response frame
+        :param tx_frame: (OmciFrame) Original request frame
+        :param rx_frame: (OmciFrame) Response frame
+        """
+        if self._enabled and isinstance(rx_frame, OmciFrame):
+            frame_type = rx_frame.fields['omci_message'].message_id
+            event_type = OMCI_CC._frame_to_event_type.get(frame_type)
+
+            if event_type is not None:
+                topic = OMCI_CC.event_bus_topic(self._device_id, event_type)
+                msg = {TX_REQUEST_KEY: tx_frame,
+                       RX_RESPONSE_KEY: rx_frame}
+
+                self.event_bus.publish(topic=topic, msg=msg)
+
+    def _publish_connectivity_event(self, connected):
+        """
+        Notify listeners of Rx/Tx connectivity over OMCI
+        :param connected: (bool) True if connectivity transitioned from unreachable
+                                 to reachable
+        """
+        if self._enabled:
+            topic = OMCI_CC.event_bus_topic(self._device_id,
+                                            RxEvent.Connectivity)
+            msg = {CONNECTED_KEY: connected}
+            self.event_bus.publish(topic=topic, msg=msg)
+
+    def flush(self):
+        """Flush/cancel in active or pending Tx requests"""
+        requests = []
+
+        for priority in {OMCI_CC.HIGH_PRIORITY, OMCI_CC.LOW_PRIORITY}:
+            next_frame, self._tx_request[priority] = self._tx_request[priority], None
+            if next_frame is not None:
+                requests.append((next_frame[OMCI_CC.REQUEST_DEFERRED], next_frame[OMCI_CC.REQUEST_DELAYED_CALL]))
+
+            requests += [(next_frame[OMCI_CC.PENDING_DEFERRED], None)
+                         for next_frame in self._pending[priority]]
+            self._pending[priority] = list()
+
+        # Cancel them...
+        def cleanup_unhandled_error(_):
+            pass    # So the cancel below does not flag an unhandled error
+
+        for d, dc in requests:
+            if d is not None and not d.called:
+                d.addErrback(cleanup_unhandled_error)
+                d.cancel()
+
+            if dc is not None and not dc.called and not dc.cancelled:
+                dc.cancel()
+
+    def _get_tx_tid(self, high_priority=False):
+        """
+        Get the next Transaction ID for a tx.  Note TID=0 is reserved
+        for autonomously generated messages from an ONU
+
+        :return: (int) TID
+        """
+        if self._extended_messaging or not high_priority:
+            index = OMCI_CC.LOW_PRIORITY
+            min_tid = OMCI_CC.MIN_OMCI_TX_ID_LOW_PRIORITY
+            max_tid = OMCI_CC.MAX_OMCI_TX_ID_LOW_PRIORITY
+        else:
+            index = OMCI_CC.HIGH_PRIORITY
+            min_tid = OMCI_CC.MIN_OMCI_TX_ID_HIGH_PRIORITY
+            max_tid = OMCI_CC.MAX_OMCI_TX_ID_HIGH_PRIORITY
+
+        tx_tid, self._tx_tid[index] = self._tx_tid[index], self._tx_tid[index] + 1
+
+        if self._tx_tid[index] > max_tid:
+            self._tx_tid[index] = min_tid
+
+        return tx_tid
+
+    def _request_failure(self, value, tx_tid, high_priority):
+        """
+        Handle a transmit failure. Rx Timeouts are handled on the 'dc' deferred and
+        will call a different method that may retry if requested.  This routine
+        will be called after the final (if any) timeout or other error
+
+        :param value: (Failure) Twisted failure
+        :param tx_tid: (int) Associated Tx TID
+        """
+        index = self._get_priority_index(high_priority)
+
+        if self._tx_request[index] is not None:
+            tx_frame = self._tx_request[index][OMCI_CC.REQUEST_FRAME]
+            tx_frame_tid = tx_frame.fields['transaction_id']
+
+            if tx_frame_tid == tx_tid:
+                timeout = self._tx_request[index][OMCI_CC.REQUEST_TIMEOUT]
+                dc = self._tx_request[index][OMCI_CC.REQUEST_DELAYED_CALL]
+                self._tx_request[index] = None
+
+                if dc is not None and not dc.called and not dc.cancelled:
+                    dc.cancel()
+
+                if isinstance(value, failure.Failure):
+                    value.trap(CancelledError)
+                    self._rx_timeouts += 1
+                    self._consecutive_errors += 1
+                    if self._consecutive_errors == 1:
+                        reactor.callLater(0, self._publish_connectivity_event, False)
+
+                    self.log.debug('timeout', tx_id=tx_tid, timeout=timeout)
+                    value = failure.Failure(TimeoutError(timeout, "Deferred"))
+            else:
+                # Search pending queue. This may be a cancel coming in from the original
+                # task that requested the Tx.  If found, remove
+                # from pending queue
+                for index, request in enumerate(self._pending[index]):
+                    req = request.get(OMCI_CC.PENDING_DEFERRED)
+                    if req is not None and req.fields['transaction_id'] == tx_tid:
+                        self._pending[index].pop(index)
+                        break
+
+        self._send_next_request(high_priority)
+        return value
+
+    def _request_success(self, rx_frame, high_priority):
+        """
+        Handle transmit success (a matching Rx was received)
+
+        :param rx_frame: (OmciFrame) OMCI response frame with matching TID
+        :return: (OmciFrame) OMCI response frame with matching TID
+        """
+        index = self._get_priority_index(high_priority)
+
+        if rx_frame is None:
+            rx_frame = self._rx_response[index]
+
+        rx_tid = rx_frame.fields.get('transaction_id')
+
+        if rx_tid is not None:
+            if self._tx_request[index] is not None:
+                tx_frame = self._tx_request[index][OMCI_CC.REQUEST_FRAME]
+                tx_tid = tx_frame.fields['transaction_id']
+
+                if rx_tid == tx_tid:
+                    # Remove this request. Next callback in chain initiates next Tx
+                    self._tx_request[index] = None
+                else:
+                    self._rx_late += 1
+            else:
+                self._rx_late += 1
+
+        self._send_next_request(high_priority)
+
+        # Return rx_frame (to next item in callback list)
+        return rx_frame
+
+    def _request_timeout(self, tx_tid, high_priority):
+        """
+        Tx Request timed out.  Resend immediately if there retries is non-zero.  A
+        separate deferred (dc) is used on each actual Tx which is not the deferred
+        (d) that is returned to the caller of the 'send()' method.
+
+        If the timeout if the transmitted frame was zero, this is just cleanup of
+        that transmit request and not necessarily a transmit timeout
+
+        :param tx_tid: (int) TID of frame
+        :param high_priority: (bool) True if high-priority queue
+        """
+        self.log.debug("_request_timeout", tx_tid=tx_tid)
+        index = self._get_priority_index(high_priority)
+
+        if self._tx_request[index] is not None:
+            # (0: timestamp, 1: defer, 2: frame, 3: timeout, 4: retry, 5: delayedCall)
+            ts, d, frame, timeout, retry, _dc = self._tx_request[index]
+
+            if frame.fields.get('transaction_id', 0) == tx_tid:
+                self._tx_request[index] = None
+
+                if timeout > 0:
+                    self._rx_timeouts += 1
+
+                    if retry > 0:
+                        # Push on front of TX pending queue so that it transmits next with the
+                        # original TID
+                        self._queue_frame(d, frame, timeout, retry - 1, high_priority, front=True)
+
+                    elif not d.called:
+                        d.errback(failure.Failure(TimeoutError(timeout, "Send OMCI TID -{}".format(tx_tid))))
+            else:
+                self.log.warn('timeout-but-not-the-tx-frame')  # Statement mainly for debugging
+
+        self._send_next_request(high_priority)
+
+    def _queue_frame(self, d, frame, timeout, retry, high_priority, front=False):
+        index = self._get_priority_index(high_priority)
+        tx_tuple = (d, frame, timeout, retry)        # Pending -> (deferred, tx_frame, timeout, retry)
+
+        if front:
+            self._pending[index].insert(0, tuple)
+        else:
+            self._pending[index].append(tx_tuple)
+
+        # Monitor queue stats
+        qlen = len(self._pending[index])
+
+        if high_priority:
+            if self._max_hp_tx_queue < qlen:
+                self._max_hp_tx_queue = qlen
+
+        elif self._max_lp_tx_queue < qlen:
+            self._max_lp_tx_queue = qlen
+
+        self.log.debug("queue-size", index=index, pending_qlen=qlen)
+
+    def send(self, frame, timeout=DEFAULT_OMCI_TIMEOUT, retry=0, high_priority=False):
+        """
+        Queue the OMCI Frame for a transmit to the ONU via the proxy_channel
+
+        :param frame: (OMCIFrame) Message to send
+        :param timeout: (int) Rx Timeout. 0=No response needed
+        :param retry: (int) Additional retry attempts on channel failure, default=0
+        :param high_priority: (bool) High Priority requests
+        :return: (deferred) A deferred that fires when the response frame is received
+                            or if an error/timeout occurs
+        """
+        if not self.enabled or self._proxy_address is None:
+            # TODO custom exceptions throughout this code would be helpful
+            self._tx_errors += 1
+            return fail(result=failure.Failure(Exception('OMCI is not enabled')))
+
+        timeout = float(timeout)
+        if timeout > float(MAX_OMCI_REQUEST_AGE):
+            self._tx_errors += 1
+            msg = 'Maximum timeout is {} seconds'.format(MAX_OMCI_REQUEST_AGE)
+            return fail(result=failure.Failure(Exception(msg)))
+
+        if not isinstance(frame, OmciFrame):
+            self._tx_errors += 1
+            msg = "Invalid frame class '{}'".format(type(frame))
+            return fail(result=failure.Failure(Exception(msg)))
+        try:
+            index = self._get_priority_index(high_priority)
+            tx_tid = frame.fields['transaction_id']
+
+            if tx_tid is None:
+                tx_tid = self._get_tx_tid(high_priority=high_priority)
+                frame.fields['transaction_id'] = tx_tid
+
+            assert tx_tid not in self._pending[index], 'TX TID {} is already exists'.format(tx_tid)
+            assert tx_tid > 0, 'Invalid Tx TID: {}'.format(tx_tid)
+
+            # Queue it and request next Tx if tx channel is free
+            d = defer.Deferred()
+
+            self._queue_frame(d, frame, timeout, retry, high_priority, front=False)
+            self._send_next_request(high_priority)
+
+            if timeout == 0:
+                self.log.debug("send-timeout-zero", tx_tid=tx_tid)
+                self.reactor.callLater(0, d.callback, 'queued')
+
+            return d
+
+        except Exception as e:
+            self._tx_errors += 1
+            self._consecutive_errors += 1
+
+            if self._consecutive_errors == 1:
+                self.reactor.callLater(0, self._publish_connectivity_event, False)
+
+            self.log.exception('send-omci', e=e)
+            return fail(result=failure.Failure(e))
+
+    def _ok_to_send(self, tx_request, high_priority):
+        """
+        G.988 specifies not to issue a MIB upload or a Software download request
+        when a similar action is in progress on the other channel. To keep the
+        logic here simple, a new upload/download will not be allowed if either a
+        upload/download is going on
+
+        :param tx_request (OmciFrame) Frame to send
+        :param high_priority: (bool) for queue selection
+        :return: True if okay to dequeue and send frame
+        """
+        other = self._get_priority_index(not high_priority)
+
+        if self._tx_request[other] is None:
+            return True
+
+        this_msg_type = tx_request.fields['message_type'] & 0x1f
+        not_allowed = {OP.MibUpload.value,
+                       OP.MibUploadNext.value,
+                       OP.StartSoftwareDownload.value,
+                       OP.DownloadSection.value,
+                       OP.EndSoftwareDownload.value}
+
+        if this_msg_type not in not_allowed:
+            return True
+
+        other_msg_type = self._tx_request[other][OMCI_CC.REQUEST_FRAME].fields['message_type'] & 0x1f
+        return other_msg_type not in not_allowed
+
+    def _send_next_request(self, high_priority):
+        """
+        Pull next tx request and send it
+
+        :param high_priority: (bool) True if this was a high priority request
+        :return: results, so callback chain continues if needed
+        """
+        index = self._get_priority_index(high_priority)
+
+        if self._tx_request[index] is None:  # TODO or self._tx_request[index][OMCI_CC.REQUEST_DEFERRED].called:
+            d = None
+            try:
+                if len(self._pending[index]) and \
+                        not self._ok_to_send(self._pending[index][0][OMCI_CC.PENDING_FRAME],
+                                             high_priority):
+                    reactor.callLater(0.05, self._send_next_request, high_priority)
+                    return
+
+                next_frame = self._pending[index].pop(0)
+
+                d = next_frame[OMCI_CC.PENDING_DEFERRED]
+                frame = next_frame[OMCI_CC.PENDING_FRAME]
+                timeout = next_frame[OMCI_CC.PENDING_TIMEOUT]
+                retry = next_frame[OMCI_CC.PENDING_RETRY]
+
+                tx_tid = frame.fields['transaction_id']
+
+                # NOTE: Since we may need to do an independent ME map on a per-ONU basis
+                #       save the current value of the entity_id_to_class_map, then
+                #       replace it with our custom one before decode, and then finally
+                #       restore it later. Tried other ways but really made the code messy.
+                saved_me_map = omci_entities.entity_id_to_class_map
+                omci_entities.entity_id_to_class_map = self._me_map
+
+                ts = arrow.utcnow().float_timestamp
+                try:
+                    self._rx_response[index] = None
+                    self._adapter_agent.send_proxied_message(self._proxy_address,
+                                                             hexify(str(frame)))
+                finally:
+                    omci_entities.entity_id_to_class_map = saved_me_map
+
+                self._tx_frames += 1
+
+                # Note: the 'd' deferred in the queued request we just got will
+                # already have its success callback queued (callLater -> 0) with a
+                # result of "queued".  Here we need time it out internally so
+                # we can call cleanup appropriately. G.988 mentions that most ONUs
+                # will process an request in < 1 second.
+                dc_timeout = timeout if timeout > 0 else 1.0
+
+                # Timeout on internal deferred to support internal retries if requested
+                dc = self.reactor.callLater(dc_timeout, self._request_timeout, tx_tid, high_priority)
+
+                # (timestamp, defer, frame, timeout, retry, delayedCall)
+                self._tx_request[index] = (ts, d, frame, timeout, retry, dc)
+
+                if timeout > 0:
+                    d.addCallbacks(self._request_success, self._request_failure,
+                                   callbackArgs=(high_priority,),
+                                   errbackArgs=(tx_tid, high_priority))
+
+            except IndexError:
+                pass    # Nothing pending in this queue
+
+            except Exception as e:
+                self.log.exception('send-proxy-exception', e=e)
+                self._tx_request[index] = None
+                self.reactor.callLater(0, self._send_next_request, high_priority)
+
+                if d is not None:
+                    d.errback(failure.Failure(e))
+        else:
+            self.log.debug("tx-request-occupied", index=index)
+
+    ###################################################################################
+    # MIB Action shortcuts
+
+    def send_mib_reset(self, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        """
+        Perform a MIB Reset
+        """
+        self.log.debug('send-mib-reset')
+
+        frame = OntDataFrame().mib_reset()
+        return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+    def send_mib_upload(self, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        self.log.debug('send-mib-upload')
+
+        frame = OntDataFrame().mib_upload()
+        return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+    def send_mib_upload_next(self, seq_no, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        self.log.debug('send-mib-upload-next')
+
+        frame = OntDataFrame(sequence_number=seq_no).mib_upload_next()
+        return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+    def send_reboot(self, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        """
+        Send an ONU Device reboot request (ONU-G ME).
+
+        NOTICE: This method is being deprecated and replaced with a tasks to preform this function
+        """
+        self.log.debug('send-mib-reboot')
+
+        frame = OntGFrame().reboot()
+        return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+    def send_get_all_alarm(self, alarm_retrieval_mode=0, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        self.log.debug('send_get_alarm')
+
+        frame = OntDataFrame().get_all_alarm(alarm_retrieval_mode)
+        return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+    def send_get_all_alarm_next(self, seq_no, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        self.log.debug('send_get_alarm_next')
+
+        frame = OntDataFrame().get_all_alarm_next(seq_no)
+        return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+    def send_start_software_download(self, image_inst_id, image_size, window_size, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        frame = SoftwareImageFrame(image_inst_id).start_software_download(image_size, window_size-1)
+        return self.send(frame, timeout, 3, high_priority=high_priority)
+        
+    def send_download_section(self, image_inst_id, section_num, data, size=DEFAULT_OMCI_DOWNLOAD_SECTION_SIZE, timeout=0, high_priority=False):
+        """
+        # timeout=0 indicates no repons needed
+        """
+        # self.log.debug("send_download_section", instance_id=image_inst_id, section=section_num, timeout=timeout)
+        if timeout > 0:
+            frame = SoftwareImageFrame(image_inst_id).download_section(True, section_num, data)
+        else:
+            frame = SoftwareImageFrame(image_inst_id).download_section(False, section_num, data)
+        return self.send(frame, timeout, high_priority=high_priority)
+        
+        # if timeout > 0:
+        #     self.reactor.callLater(0, self.sim_receive_download_section_resp, 
+        #                            frame.fields["transaction_id"], 
+        #                            frame.fields["omci_message"].fields["section_number"])
+        # return d
+
+    def send_end_software_download(self, image_inst_id, crc32, image_size, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        frame = SoftwareImageFrame(image_inst_id).end_software_download(crc32, image_size)
+        return self.send(frame, timeout, high_priority=high_priority)
+        # self.reactor.callLater(0, self.sim_receive_end_software_download_resp, frame.fields["transaction_id"])
+        # return d
+
+    def send_active_image(self, image_inst_id, flag=0, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        frame = SoftwareImageFrame(image_inst_id).activate_image(flag)
+        return self.send(frame, timeout, high_priority=high_priority)
+
+    def send_commit_image(self, image_inst_id, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+        frame = SoftwareImageFrame(image_inst_id).commit_image()
+        return self.send(frame, timeout, high_priority=high_priority)
+
diff --git a/python/extensions/omci/omci_defs.py b/python/extensions/omci/omci_defs.py
new file mode 100644
index 0000000..64fefc5
--- /dev/null
+++ b/python/extensions/omci/omci_defs.py
@@ -0,0 +1,100 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from enum import Enum, IntEnum
+
+class OmciUninitializedFieldError(Exception):
+    pass
+
+
+class OmciInvalidTypeError(Exception):
+    pass
+
+def bitpos_from_mask(mask, lsb_pos=0, increment=1):
+    """
+    Turn a decimal value (bitmask) into a list of indices where each
+    index value corresponds to the bit position of a bit that was set (1)
+    in the mask. What numbers are assigned to the bit positions is controlled
+    by lsb_pos and increment, as explained below.
+    :param mask: a decimal value used as a bit mask
+    :param lsb_pos: The decimal value associated with the LSB bit
+    :param increment: If this is +i, then the bit next to LSB will take
+    the decimal value of lsb_pos + i.
+    :return: List of bit positions where the bit was set in mask
+    """
+    out = []
+    while mask:
+        if mask & 0x01:
+            out.append(lsb_pos)
+        lsb_pos += increment
+        mask >>= 1
+    return sorted(out)
+
+
+class AttributeAccess(Enum):
+    Readable = 1
+    R = 1
+    Writable = 2
+    W = 2
+    SetByCreate = 3
+    SBC = 3
+
+
+OmciNullPointer = 0xffff
+OmciSectionDataSize = 31
+
+class EntityOperations(Enum):
+    # keep these numbers match msg_type field per OMCI spec
+    Create = 4
+    CreateComplete = 5
+    Delete = 6
+    Set = 8
+    Get = 9
+    GetComplete = 10
+    GetAllAlarms = 11
+    GetAllAlarmsNext = 12
+    MibUpload = 13
+    MibUploadNext = 14
+    MibReset = 15
+    AlarmNotification = 16
+    AttributeValueChange = 17
+    Test = 18
+    StartSoftwareDownload = 19
+    DownloadSection = 20
+    EndSoftwareDownload = 21
+    ActivateSoftware = 22
+    CommitSoftware = 23
+    SynchronizeTime = 24
+    Reboot = 25
+    GetNext = 26
+    TestResult = 27
+    GetCurrentData = 28
+    SetTable = 29       # Defined in Extended Message Set Only
+
+
+class ReasonCodes(IntEnum):
+    # OMCI Result and reason codes
+    Success = 0,            # Command processed successfully
+    ProcessingError = 1,    # Command processing error
+    NotSupported = 2,       # Command not supported
+    ParameterError = 3,     # Parameter error
+    UnknownEntity = 4,      # Unknown managed entity
+    UnknownInstance = 5,    # Unknown managed entity instance
+    DeviceBusy = 6,         # Device busy
+    InstanceExists = 7,     # Instance Exists
+    AttributeFailure = 9,   # Attribute(s) failed or unknown
+
+    OperationCancelled = 255 # Proprietary defined for internal use
+    
diff --git a/python/extensions/omci/omci_entities.py b/python/extensions/omci/omci_entities.py
new file mode 100644
index 0000000..3968224
--- /dev/null
+++ b/python/extensions/omci/omci_entities.py
@@ -0,0 +1,1564 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import inspect
+
+import sys
+from binascii import hexlify
+from bitstring import BitArray
+import json
+from scapy.fields import ByteField, ShortField, MACField, BitField, IPField
+from scapy.fields import IntField, StrFixedLenField, LongField, FieldListField, PacketLenField
+from scapy.packet import Packet
+
+from voltha.extensions.omci.omci_defs import OmciUninitializedFieldError, \
+    AttributeAccess, OmciNullPointer, EntityOperations, OmciInvalidTypeError
+from voltha.extensions.omci.omci_fields import OmciSerialNumberField, OmciTableField
+from voltha.extensions.omci.omci_defs import bitpos_from_mask
+
+class EntityClassAttribute(object):
+
+    def __init__(self, fld, access=set(), optional=False, range_check=None,
+                 avc=False, tca=False, counter=False, deprecated=False):
+        """
+        Initialize an Attribute for a Managed Entity Class
+
+        :param fld: (Field) Scapy field type
+        :param access: (AttributeAccess) Allowed access
+        :param optional: (boolean) If true, attribute is option, else mandatory
+        :param range_check: (callable) None, Lambda, or Function to validate value
+        :param avc: (boolean) If true, an AVC notification can occur for the attribute
+        :param tca: (boolean) If true, a threshold crossing alert alarm notification can occur
+                              for the attribute
+        :param counter: (boolean) If true, this attribute is a PM counter
+        :param deprecated: (boolean) If true, this attribute is deprecated and
+                           only 'read' operations (if-any) performed.
+        """
+        self._fld = fld
+        self._access = access
+        self._optional = optional
+        self._range_check = range_check
+        self._avc = avc
+        self._tca = tca
+        self._counter = counter
+        self._deprecated = deprecated
+
+    @property
+    def field(self):
+        return self._fld
+
+    @property
+    def access(self):
+        return self._access
+
+    @property
+    def optional(self):
+        return self._optional
+
+    @property
+    def is_counter(self):
+        return self._counter
+
+    @property
+    def range_check(self):
+        return self._range_check
+
+    @property
+    def avc_allowed(self):
+        return self._avc
+
+    @property
+    def deprecated(self):
+        return self._deprecated
+
+    _type_checker_map = {
+        'ByteField': lambda val: isinstance(val, (int, long)) and 0 <= val <= 0xFF,
+        'ShortField': lambda val: isinstance(val, (int, long)) and 0 <= val <= 0xFFFF,
+        'IntField': lambda val: isinstance(val, (int, long)) and 0 <= val <= 0xFFFFFFFF,
+        'LongField': lambda val: isinstance(val, (int, long)) and 0 <= val <= 0xFFFFFFFFFFFFFFFF,
+        'StrFixedLenField': lambda val: isinstance(val, basestring),
+        'MACField': lambda val: True,   # TODO: Add a constraint for this field type
+        'BitField': lambda val: True,   # TODO: Add a constraint for this field type
+        'IPField': lambda val: True,    # TODO: Add a constraint for this field type
+        'OmciTableField': lambda val: True,
+
+        # TODO: As additional Scapy field types are used, add constraints
+    }
+
+    def valid(self, value):
+        def _isa_lambda_function(v):
+            import inspect
+            return callable(v) and len(inspect.getargspec(v).args) == 1
+
+        field_type = self.field.__class__.__name__
+        type_check = EntityClassAttribute._type_checker_map.get(field_type,
+                                                                lambda val: True)
+
+        # TODO: Currently StrFixedLenField is used heavily for both bit fields as
+        #       and other 'byte/octet' related strings that are NOT textual. Until
+        #       all of these are corrected, 'StrFixedLenField' cannot test the type
+        #       of the value provided
+
+        if field_type != 'StrFixedLenField' and not type_check(value):
+            return False
+
+        if _isa_lambda_function(self.range_check):
+            return self.range_check(value)
+        return True
+
+
+class EntityClassMeta(type):
+    """
+    Metaclass for EntityClass to generate secondary class attributes
+    for class attributes of the derived classes.
+    """
+    def __init__(cls, name, bases, dct):
+        super(EntityClassMeta, cls).__init__(name, bases, dct)
+
+        # initialize attribute_name_to_index_map
+        cls.attribute_name_to_index_map = dict(
+            (a._fld.name, idx) for idx, a in enumerate(cls.attributes))
+
+
+class EntityClass(object):
+
+    class_id = 'to be filled by subclass'
+    attributes = []
+    mandatory_operations = set()
+    optional_operations = set()
+    notifications = set()
+    alarms = dict()       # Alarm Number -> Alarm Name
+    hidden = False        # If true, this attribute is not reported by a MIB upload.
+                          # This attribute is needed to be able to properly perform
+                          # MIB Audits.
+
+    # will be map of attr_name -> index in attributes, initialized by metaclass
+    attribute_name_to_index_map = None
+    __metaclass__ = EntityClassMeta
+
+    def __init__(self, **kw):
+        assert(isinstance(kw, dict))
+        for k, v in kw.iteritems():
+            assert(k in self.attribute_name_to_index_map)
+        self._data = kw
+
+    def serialize(self, mask=None, operation=None):
+        octets = ''
+
+        # generate ordered list of attribute indices needed to be processed
+        # if mask is provided, we use that explicitly
+        # if mask is not provided, we determine attributes from the self._data
+        # content also taking into account the type of operation in hand
+        if mask is not None:
+            attribute_indices = EntityClass.attribute_indices_from_mask(mask)
+        else:
+            attribute_indices = self.attribute_indices_from_data()
+
+        # Serialize each indexed field (ignoring entity id)
+        for index in attribute_indices:
+            eca = self.attributes[index]
+            field = eca.field
+            try:
+                value = self._data[field.name]
+
+                if not eca.valid(value):
+                    raise OmciInvalidTypeError(
+                        'Value "{}" for Entity field "{}" is not valid'.format(value,
+                                                                               field.name))
+            except KeyError:
+                raise OmciUninitializedFieldError(
+                    'Entity field "{}" not set'.format(field.name))
+
+            octets = field.addfield(None, octets, value)
+
+        return octets
+
+    def attribute_indices_from_data(self):
+        return sorted(
+            self.attribute_name_to_index_map[attr_name]
+            for attr_name in self._data.iterkeys())
+
+    byte1_mask_to_attr_indices = dict(
+        (m, bitpos_from_mask(m, 8, -1)) for m in range(256))
+    byte2_mask_to_attr_indices = dict(
+        (m, bitpos_from_mask(m, 16, -1)) for m in range(256))
+
+    @classmethod
+    def attribute_indices_from_mask(cls, mask):
+        # each bit in the 2-byte field denote an attribute index; we use a
+        # lookup table to make lookup a bit faster
+        return \
+            cls.byte1_mask_to_attr_indices[(mask >> 8) & 0xff] + \
+            cls.byte2_mask_to_attr_indices[(mask & 0xff)]
+
+    @classmethod
+    def mask_for(cls, *attr_names):
+        """
+        Return mask value corresponding to given attributes names
+        :param attr_names: Attribute names
+        :return: integer mask value
+        """
+        mask = 0
+        for attr_name in attr_names:
+            index = cls.attribute_name_to_index_map[attr_name]
+            mask |= (1 << (16 - index))
+        return mask
+
+
+# abbreviations
+ECA = EntityClassAttribute
+AA = AttributeAccess
+OP = EntityOperations
+
+
+class OntData(EntityClass):
+    class_id = 2
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x == 0),
+        # Only 1 octet used if GET/SET operation
+        ECA(ShortField("mib_data_sync", 0), {AA.R, AA.W})
+    ]
+    mandatory_operations = {OP.Get, OP.Set,
+                            OP.GetAllAlarms, OP.GetAllAlarmsNext,
+                            OP.MibReset, OP.MibUpload, OP.MibUploadNext}
+
+
+class Cardholder(EntityClass):
+    class_id = 5
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: 0 <= x < 255 or 256 <= x < 511,
+            avc=True),
+        ECA(ByteField("actual_plugin_unit_type", None), {AA.R}),
+        ECA(ByteField("expected_plugin_unit_type", None), {AA.R, AA.W}),
+        ECA(ByteField("expected_port_count", None), {AA.R, AA.W},
+            optional=True),
+        ECA(StrFixedLenField("expected_equipment_id", None, 20), {AA.R, AA.W},
+            optional=True, avc=True),
+        ECA(StrFixedLenField("actual_equipment_id", None, 20), {AA.R},
+            optional=True),
+        ECA(ByteField("protection_profile_pointer", None), {AA.R},
+            optional=True),
+        ECA(ByteField("invoke_protection_switch", None), {AA.R, AA.W},
+            optional=True, range_check=lambda x: 0 <= x <= 3),
+        ECA(ByteField("arc", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1, optional=True, avc=True),
+        ECA(ByteField("arc_interval", 0), {AA.R, AA.W}, optional=True),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'Plug-in circuit pack missing',
+        1: 'Plug-in type mismatch alarm',
+        2: 'Improper card removal',
+        3: 'Plug-in equipment ID mismatch alarm',
+        4: 'Protection switch',
+    }
+
+
+class CircuitPack(EntityClass):
+    class_id = 6
+    attributes = [
+        ECA(StrFixedLenField("managed_entity_id", None, 22), {AA.R, AA.SBC},
+            range_check=lambda x: 0 <= x < 255 or 256 <= x < 511),
+        ECA(ByteField("type", None), {AA.R, AA.SBC}),
+        ECA(ByteField("number_of_ports", None), {AA.R}, optional=True),
+        ECA(OmciSerialNumberField("serial_number"), {AA.R}),
+        ECA(StrFixedLenField("version", None, 14), {AA.R}),
+        ECA(StrFixedLenField("vendor_id", None, 4), {AA.R}),
+        ECA(ByteField("administrative_state", None), {AA.R, AA.W}),
+        ECA(ByteField("operational_state", None), {AA.R}, optional=True, avc=True),
+        ECA(ByteField("bridged_or_ip_ind", None), {AA.R, AA.W}, optional=True,
+            range_check=lambda x: 0 <= x <= 2),
+        ECA(StrFixedLenField("equipment_id", None, 20), {AA.R}, optional=True),
+        ECA(ByteField("card_configuration", None), {AA.R, AA.W, AA.SBC},
+            optional=True),  # not really mandatory, see spec ITU-T G.988, 9.1.6
+        ECA(ByteField("total_tcont_buffer_number", None), {AA.R},
+            optional=True),  # not really mandatory, see spec ITU-T G.988, 9.1.6
+        ECA(ByteField("total_priority_queue_number", None), {AA.R},
+            optional=True),  # not really mandatory, see spec ITU-T G.988, 9.1.6
+        ECA(ByteField("total_traffic_scheduler_number", None), {AA.R},
+            optional=True),  # not really mandatory, see spec ITU-T G.988, 9.1.6
+        ECA(IntField("power_sched_override", None), {AA.R, AA.W},
+            optional=True)
+    ]
+    mandatory_operations = {OP.Get, OP.Set, OP.Reboot}
+    optional_operations = {OP.Create, OP.Delete, OP.Test}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'Equipment alarm',
+        1: 'Powering alarm',
+        2: 'Self-test failure',
+        3: 'Laser end of life',
+        4: 'Temperature yellow',
+        5: 'Temperature red',
+    }
+
+class SoftwareImage(EntityClass):
+    class_id = 7
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: 0 <= x/256 <= 254 or 0 <= x % 256 <= 1),
+        ECA(StrFixedLenField("version", None, 14), {AA.R}, avc=True),
+        ECA(ByteField("is_committed", None), {AA.R}, avc=True,
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("is_active", None), {AA.R}, avc=True,
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("is_valid", None), {AA.R}, avc=True,
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(StrFixedLenField("product_code", None, 25), {AA.R}, optional=True, avc=True),
+        ECA(StrFixedLenField("image_hash", None, 16), {AA.R}, optional=True, avc=True),
+    ]
+    mandatory_operations = {OP.Get, OP.StartSoftwareDownload, OP.DownloadSection,
+                            OP.EndSoftwareDownload, OP.ActivateSoftware,
+                            OP.CommitSoftware}
+    notifications = {OP.AttributeValueChange}
+
+
+class PptpEthernetUni(EntityClass):
+    class_id = 11
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ByteField("expected_type", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 254),
+        ECA(ByteField("sensed_type", 0), {AA.R}, optional=True, avc=True),
+        # TODO: For sensed_type AVC, see note in AT&T OMCI Specification, V3.0, page 123
+        ECA(ByteField("autodetection_config", 0), {AA.R, AA.W},
+            range_check=lambda x: x in [0, 1, 2, 3, 4, 5,
+                                        0x10, 0x11, 0x12, 0x13, 0x14,
+                                        0x20, 0x30], optional=True),  # See ITU-T G.988
+        ECA(ByteField("ethernet_loopback_config", 0), {AA.R, AA.W},
+            range_check=lambda x: x in [0, 3]),
+        ECA(ByteField("administrative_state", 1), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("operational_state", 1), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1, optional=True, avc=True),
+        ECA(ByteField("config_ind", 0), {AA.R},
+            range_check=lambda x: x in [0, 1, 2, 3, 4, 0x11, 0x12, 0x13]),
+        ECA(ShortField("max_frame_size", 1518), {AA.R, AA.W}, optional=True),
+        ECA(ByteField("dte_dce_ind", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 2),
+        ECA(ShortField("pause_time", 0), {AA.R, AA.W}, optional=True),
+        ECA(ByteField("bridged_ip_ind", 2), {AA.R, AA.W},
+            optional=True, range_check=lambda x: 0 <= x <= 2),
+        ECA(ByteField("arc", 0), {AA.R, AA.W}, optional=True,
+            range_check=lambda x: 0 <= x <= 1, avc=True),
+        ECA(ByteField("arc_interval", 0), {AA.R, AA.W}, optional=True),
+        ECA(ByteField("pppoe_filter", 0), {AA.R, AA.W}, optional=True),
+        ECA(ByteField("power_control", 0), {AA.R, AA.W}, optional=True),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'LAN Loss Of Signal',
+    }
+
+
+class MacBridgeServiceProfile(EntityClass):
+    class_id = 45
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("spanning_tree_ind", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("learning_ind", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("port_bridging_ind", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("priority", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("max_age", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0x0600 <= x <= 0x2800),
+        ECA(ShortField("hello_time", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0x0100 <= x <= 0x0A00),
+        ECA(ShortField("forward_delay", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0x0400 <= x <= 0x1E00),
+        ECA(ByteField("unknown_mac_address_discard", None),
+            {AA.R, AA.W, AA.SBC}, range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("mac_learning_depth", None),
+            {AA.R, AA.W, AA.SBC}, optional=True),
+        ECA(ByteField("dynamic_filtering_ageing_time", None),
+            {AA.R, AA.W, AA.SBC}, optional=True),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+
+
+class MacBridgePortConfigurationData(EntityClass):
+    class_id = 47
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ShortField("bridge_id_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("port_num", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("tp_type", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 1 <= x <= 12),
+        ECA(ShortField("tp_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("port_priority", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("port_path_cost", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("port_spanning_tree_in", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("encapsulation_methods", None), {AA.R, AA.W, AA.SBC},
+            optional=True, deprecated=True),
+        ECA(ByteField("lan_fcs_ind", None), {AA.R, AA.W, AA.SBC},
+            optional=True, deprecated=True),
+        ECA(MACField("port_mac_address", None), {AA.R}, optional=True),
+        ECA(ShortField("outbound_td_pointer", None), {AA.R, AA.W},
+            optional=True),
+        ECA(ShortField("inbound_td_pointer", None), {AA.R, AA.W},
+            optional=True),
+        # TODO:
+        ECA(ByteField("mac_learning_depth", 0), {AA.R, AA.W, AA.SBC},
+            optional=True),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Port blocking',
+    }
+
+
+class MacBridgePortFilterPreAssignTable(EntityClass):
+    class_id = 79
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ShortField("ipv4_multicast", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("ipv6_multicast", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("ipv4_broadcast", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("rarp", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("ipx", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("netbeui", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("appletalk", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("bridge_management_information", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("arp", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("pppoe_broadcast", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1)
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+
+
+class VlanTaggingFilterData(EntityClass):
+    class_id = 84
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(FieldListField("vlan_filter_list", None,
+                           ShortField('', 0), count_from=lambda _: 12),
+            {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("forward_operation", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0x00 <= x <= 0x21),
+        ECA(ByteField("number_of_entries", None), {AA.R, AA.W, AA.SBC})
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+
+
+class Ieee8021pMapperServiceProfile(EntityClass):
+    class_id = 130
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ShortField("tp_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_0",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_1",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_2",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_3",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_4",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_5",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_6",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interwork_tp_pointer_for_p_bit_priority_7",
+                       OmciNullPointer), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("unmarked_frame_option", None),
+            {AA.R, AA.W, AA.SBC}, range_check=lambda x: 0 <= x <= 1),
+        ECA(StrFixedLenField("dscp_to_p_bit_mapping", None, length=24),
+            {AA.R, AA.W}),  # TODO: Would a custom 3-bit group bitfield work better?
+        ECA(ByteField("default_p_bit_marking", None),
+            {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("tp_type", None), {AA.R, AA.W, AA.SBC},
+            optional=True, range_check=lambda x: 0 <= x <= 8)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+
+
+class OltG(EntityClass):
+    class_id = 131
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x == 0),
+        ECA(StrFixedLenField("olt_vendor_id", None, 4), {AA.R, AA.W}),
+        ECA(StrFixedLenField("equipment_id", None, 20), {AA.R, AA.W}),
+        ECA(StrFixedLenField("version", None, 14), {AA.R, AA.W}),
+        ECA(StrFixedLenField("time_of_day", None, 14), {AA.R, AA.W})
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+
+
+class OntPowerShedding(EntityClass):
+    class_id = 133
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x == 0),
+        ECA(ShortField("restore_power_time_reset_interval", 0),
+            {AA.R, AA.W}),
+        ECA(ShortField("data_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("voice_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("video_overlay_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("video_return_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("dsl_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("atm_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("ces_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("frame_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("sonet_class_shedding_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("shedding_status", None), {AA.R, AA.W}, optional=True,
+            avc=True),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange}
+
+
+class IpHostConfigData(EntityClass):
+    class_id = 134
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(BitField("ip_options", 0, size=8), {AA.R, AA.W}),
+        ECA(MACField("mac_address", None), {AA.R}),
+        ECA(StrFixedLenField("onu_identifier", None, 25), {AA.R, AA.W}),
+        ECA(IPField("ip_address", None), {AA.R, AA.W}),
+        ECA(IPField("mask", None), {AA.R, AA.W}),
+        ECA(IPField("gateway", None), {AA.R, AA.W}),
+        ECA(IPField("primary_dns", None), {AA.R, AA.W}),
+        ECA(IPField("secondary_dns", None), {AA.R, AA.W}),
+        ECA(IPField("current_address", None), {AA.R}, avc=True),
+        ECA(IPField("current_mask", None), {AA.R}, avc=True),
+        ECA(IPField("current_gateway", None), {AA.R}, avc=True),
+        ECA(IPField("current_primary_dns", None), {AA.R}, avc=True),
+        ECA(IPField("current_secondary_dns", None), {AA.R}, avc=True),
+        ECA(StrFixedLenField("domain_name", None, 25), {AA.R}, avc=True),
+        ECA(StrFixedLenField("host_name", None, 25), {AA.R}, avc=True),
+        ECA(ShortField("relay_agent_options", None), {AA.R, AA.W},
+            optional=True),
+    ]
+    mandatory_operations = {OP.Get, OP.Set, OP.Test}
+    notifications = {OP.AttributeValueChange}
+
+
+class VlanTaggingOperation(Packet):
+    name = "VlanTaggingOperation"
+    fields_desc = [
+        BitField("filter_outer_priority", 0, 4),
+        BitField("filter_outer_vid", 0, 13),
+        BitField("filter_outer_tpid_de", 0, 3),
+        BitField("pad1", 0, 12),
+
+        BitField("filter_inner_priority", 0, 4),
+        BitField("filter_inner_vid", 0, 13),
+        BitField("filter_inner_tpid_de", 0, 3),
+        BitField("pad2", 0, 8),
+        BitField("filter_ether_type", 0, 4),
+
+        BitField("treatment_tags_to_remove", 0, 2),
+        BitField("pad3", 0, 10),
+        BitField("treatment_outer_priority", 0, 4),
+        BitField("treatment_outer_vid", 0, 13),
+        BitField("treatment_outer_tpid_de", 0, 3),
+
+        BitField("pad4", 0, 12),
+        BitField("treatment_inner_priority", 0, 4),
+        BitField("treatment_inner_vid", 0, 13),
+        BitField("treatment_inner_tpid_de", 0, 3),
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+    @staticmethod
+    def json_from_value(value):
+        bits = BitArray(hex=hexlify(value))
+        temp = VlanTaggingOperation(
+            filter_outer_priority=bits[0:4].uint,         # 4  <-size
+            filter_outer_vid=bits[4:17].uint,             # 13
+            filter_outer_tpid_de=bits[17:20].uint,        # 3
+                                                          # pad 12
+            filter_inner_priority=bits[32:36].uint,       # 4
+            filter_inner_vid=bits[36:49].uint,            # 13
+            filter_inner_tpid_de=bits[49:52].uint,        # 3
+                                                          # pad 8
+            filter_ether_type=bits[60:64].uint,           # 4
+            treatment_tags_to_remove=bits[64:66].uint,    # 2
+                                                          # pad 10
+            treatment_outer_priority=bits[76:80].uint,    # 4
+            treatment_outer_vid=bits[80:93].uint,         # 13
+            treatment_outer_tpid_de=bits[93:96].uint,     # 3
+                                                          # pad 12
+            treatment_inner_priority=bits[108:112].uint,  # 4
+            treatment_inner_vid=bits[112:125].uint,       # 13
+            treatment_inner_tpid_de=bits[125:128].uint,   # 3
+        )
+        return json.dumps(temp.fields, separators=(',', ':'))
+
+    def index(self):
+        return '{:02}'.format(self.fields.get('filter_outer_priority',0)) + \
+               '{:03}'.format(self.fields.get('filter_outer_vid',0)) + \
+               '{:01}'.format(self.fields.get('filter_outer_tpid_de',0)) + \
+               '{:03}'.format(self.fields.get('filter_inner_priority',0)) + \
+               '{:04}'.format(self.fields.get('filter_inner_vid',0)) + \
+               '{:01}'.format(self.fields.get('filter_inner_tpid_de',0)) + \
+               '{:02}'.format(self.fields.get('filter_ether_type',0))
+
+    def is_delete(self):
+        return self.fields.get('treatment_tags_to_remove',0) == 0x3 and \
+            self.fields.get('pad3',0) == 0x3ff and \
+            self.fields.get('treatment_outer_priority',0) == 0xf and \
+            self.fields.get('treatment_outer_vid',0) == 0x1fff and \
+            self.fields.get('treatment_outer_tpid_de',0) == 0x7 and \
+            self.fields.get('pad4',0) == 0xfff and \
+            self.fields.get('treatment_inner_priority',0) == 0xf and \
+            self.fields.get('treatment_inner_vid',0) == 0x1fff and \
+            self.fields.get('treatment_inner_tpid_de',0) == 0x7
+
+    def delete(self):
+        self.fields['treatment_tags_to_remove'] = 0x3
+        self.fields['pad3'] = 0x3ff
+        self.fields['treatment_outer_priority'] = 0xf
+        self.fields['treatment_outer_vid'] = 0x1fff
+        self.fields['treatment_outer_tpid_de'] = 0x7
+        self.fields['pad4'] = 0xfff
+        self.fields['treatment_inner_priority'] = 0xf
+        self.fields['treatment_inner_vid'] = 0x1fff
+        self.fields['treatment_inner_tpid_de'] = 0x7
+        return self
+
+class ExtendedVlanTaggingOperationConfigurationData(EntityClass):
+    class_id = 171
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("association_type", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 11),
+        ECA(ShortField("received_vlan_tagging_operation_table_max_size", None),
+            {AA.R}),
+        ECA(ShortField("input_tpid", None), {AA.R, AA.W}),
+        ECA(ShortField("output_tpid", None), {AA.R, AA.W}),
+        ECA(ByteField("downstream_mode", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 8),
+        ECA(OmciTableField(
+            PacketLenField("received_frame_vlan_tagging_operation_table", None,
+                VlanTaggingOperation, length_from=lambda pkt: 16)), {AA.R, AA.W}),
+        ECA(ShortField("associated_me_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(FieldListField("dscp_to_p_bit_mapping", None,
+                           BitField('',  0, size=3), count_from=lambda _: 64),
+            {AA.R, AA.W}),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Set, OP.Get, OP.GetNext}
+    optional_operations = {OP.SetTable}
+
+
+class OntG(EntityClass):
+    class_id = 256
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x == 0),
+        ECA(StrFixedLenField("vendor_id", None, 4), {AA.R}),
+        ECA(StrFixedLenField("version", None, 14), {AA.R}),
+        ECA(OmciSerialNumberField("serial_number"), {AA.R}),
+        ECA(ByteField("traffic_management_options", None), {AA.R},
+            range_check=lambda x: 0 <= x <= 2),
+        ECA(ByteField("vp_vc_cross_connection_option", 0), {AA.R},
+            optional=True, deprecated=True),
+        ECA(ByteField("battery_backup", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("administrative_state", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("operational_state", None), {AA.R}, optional=True,
+            range_check=lambda x: 0 <= x <= 1, avc=True),
+        ECA(ByteField("ont_survival_time", None), {AA.R}, optional=True),
+        ECA(StrFixedLenField("logical_onu_id", None, 24), {AA.R},
+            optional=True, avc=True),
+        ECA(StrFixedLenField("logical_password", None, 12), {AA.R},
+            optional=True, avc=True),
+        ECA(ByteField("credentials_status", None), {AA.R, AA.W},
+            optional=True, range_check=lambda x: 0 <= x <= 4),
+        ECA(BitField("extended_tc_layer_options", None, size=16), {AA.R},
+            optional=True),
+    ]
+    mandatory_operations = {
+        OP.Get, OP.Set, OP.Reboot, OP.Test, OP.SynchronizeTime}
+    notifications = {OP.TestResult, OP.AttributeValueChange,
+                     OP.AlarmNotification}
+    alarms = {
+        0: 'Equipment alarm',
+        1: 'Powering alarm',
+        2: 'Battery missing',
+        3: 'Battery failure',
+        4: 'Battery low',
+        5: 'Physical intrusion',
+        6: 'Self-test failure',
+        7: 'Dying gasp',
+        8: 'Temperature yellow',
+        9: 'Temperature red',
+        10: 'Voltage yellow',
+        11: 'Voltage red',
+        12: 'ONU manual power off',
+        13: 'Invalid image',
+        14: 'PSE overload yellow',
+        15: 'PSE overload red',
+    }
+
+
+class Ont2G(EntityClass):
+    class_id = 257
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x == 0),
+        ECA(StrFixedLenField("equipment_id", None, 20), {AA.R}),
+        ECA(ByteField("omcc_version", None), {AA.R}, avc=True),
+        ECA(ShortField("vendor_product_code", None), {AA.R}),
+        ECA(ByteField("security_capability", None), {AA.R},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("security_mode", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("total_priority_queue_number", None), {AA.R}),
+        ECA(ByteField("total_traffic_scheduler_number", None), {AA.R}),
+        ECA(ByteField("mode", None), {AA.R}, deprecated=True),
+        ECA(ShortField("total_gem_port_id_number", None), {AA.R}),
+        ECA(IntField("sys_uptime", None), {AA.R}),
+        ECA(BitField("connectivity_capability", None, size=16), {AA.R}),
+        ECA(ByteField("current_connectivity_mode", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 7),
+        ECA(BitField("qos_configuration_flexibility", None, size=16),
+            {AA.R}, optional=True),
+        ECA(ShortField("priority_queue_scale_factor", None), {AA.R, AA.W},
+            optional=True),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange}
+
+
+class Tcont(EntityClass):
+    class_id = 262
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ShortField("alloc_id", None), {AA.R, AA.W}),
+        ECA(ByteField("mode_indicator", 1), {AA.R}, deprecated=True),
+        ECA(ByteField("policy", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 2),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+
+
+class AniG(EntityClass):
+    class_id = 263
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ByteField("sr_indication", None), {AA.R}),
+        ECA(ShortField("total_tcont_number", None), {AA.R}),
+        ECA(ShortField("gem_block_length", None), {AA.R, AA.W}),
+        ECA(ByteField("piggyback_dba_reporting", None), {AA.R},
+            range_check=lambda x: 0 <= x <= 4),
+        ECA(ByteField("whole_ont_dba_reporting", None), {AA.R},
+            deprecated=True),
+        ECA(ByteField("sf_threshold", 5), {AA.R, AA.W}),
+        ECA(ByteField("sd_threshold", 9), {AA.R, AA.W}),
+        ECA(ByteField("arc", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1, avc=True),
+        ECA(ByteField("arc_interval", 0), {AA.R, AA.W}),
+        ECA(ShortField("optical_signal_level", None), {AA.R}),
+        ECA(ByteField("lower_optical_threshold", 0xFF), {AA.R, AA.W}),
+        ECA(ByteField("upper_optical_threshold", 0xFF), {AA.R, AA.W}),
+        ECA(ShortField("ont_response_time", None), {AA.R}),
+        ECA(ShortField("transmit_optical_level", None), {AA.R}),
+        ECA(ByteField("lower_transmit_power_threshold", 0x81), {AA.R, AA.W}),
+        ECA(ByteField("upper_transmit_power_threshold", 0x81), {AA.R, AA.W}),
+    ]
+    mandatory_operations = {OP.Get, OP.Set, OP.Test}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'Low received optical power',
+        1: 'High received optical power',
+        2: 'Signal fail',
+        3: 'Signal degrade',
+        4: 'Low transmit optical power',
+        5: 'High transmit optical power',
+        6: 'Laser bias current',
+    }
+
+
+class UniG(EntityClass):
+    class_id = 264
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ShortField("configuration_option_status", None), {AA.R, AA.W},
+            deprecated=True),
+        ECA(ByteField("administrative_state", None), {AA.R, AA.W}),
+        ECA(ByteField("management_capability", None), {AA.R},
+            range_check=lambda x: 0 <= x <= 2),
+        ECA(ShortField("non_omci_management_identifier", None), {AA.R, AA.W}),
+        ECA(ShortField("relay_agent_options", None), {AA.R, AA.W},
+            optional=True),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+
+
+class GemInterworkingTp(EntityClass):
+    class_id = 266
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ShortField("gem_port_network_ctp_pointer", None),
+            {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("interworking_option", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 7),
+        ECA(ShortField("service_profile_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interworking_tp_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("pptp_counter", None), {AA.R}, optional=True),
+        ECA(ByteField("operational_state", None), {AA.R}, optional=True,
+            range_check=lambda x: 0 <= x <= 1, avc=True),
+        ECA(ShortField("gal_profile_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("gal_loopback_configuration", 0),
+            {AA.R, AA.W}, range_check=lambda x: 0 <= x <= 1),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        6: 'Operational state change',
+    }
+
+
+class GemPortNetworkCtp(EntityClass):
+    class_id = 268
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ShortField("port_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("tcont_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("direction", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 1 <= x <= 3),
+        ECA(ShortField("traffic_management_pointer_upstream", None),
+            {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("traffic_descriptor_profile_pointer", None),
+            {AA.R, AA.W, AA.SBC}, optional=True),
+        ECA(ByteField("uni_counter", None), {AA.R}, optional=True),
+        ECA(ShortField("priority_queue_pointer_downstream", None),
+            {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("encryption_state", None), {AA.R}, optional=True),
+        ECA(ShortField("traffic_desc_profile_pointer_downstream", None),
+            {AA.R, AA.W, AA.SBC}, optional=True),
+        ECA(ShortField("encryption_key_ring", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 3)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        5: 'End-to-end loss of continuity',
+    }
+
+
+class GalEthernetProfile(EntityClass):
+    class_id = 272
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ShortField("max_gem_payload_size", None), {AA.R, AA.W, AA.SBC}),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+
+
+class PriorityQueueG(EntityClass):
+    class_id = 277
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ByteField("queue_configuration_option", None), {AA.R},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("maximum_queue_size", None), {AA.R}),
+        ECA(ShortField("allocated_queue_size", None), {AA.R, AA.W}),
+        ECA(ShortField("discard_block_counter_reset_interval", None), {AA.R, AA.W}),
+        ECA(ShortField("threshold_value_for_discarded_blocks", None), {AA.R, AA.W}),
+        ECA(IntField("related_port", None), {AA.R}),
+        ECA(ShortField("traffic_scheduler_pointer", 0), {AA.R, AA.W}),
+        ECA(ByteField("weight", 1), {AA.R, AA.W}),
+        ECA(ShortField("back_pressure_operation", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(IntField("back_pressure_time", 0), {AA.R, AA.W}),
+        ECA(ShortField("back_pressure_occur_queue_threshold", None), {AA.R, AA.W}),
+        ECA(ShortField("back_pressure_clear_queue_threshold", None), {AA.R, AA.W}),
+        # TODO: Custom field of 4 2-byte values would help below
+        ECA(LongField("packet_drop_queue_thresholds", None), {AA.R, AA.W},
+            optional=True),
+        ECA(ShortField("packet_drop_max_p", 0xFFFF), {AA.R, AA.W}, optional=True),
+        ECA(ByteField("queue_drop_w_q", 9), {AA.R, AA.W}, optional=True),
+        ECA(ByteField("drop_precedence_colour_marking", 0), {AA.R, AA.W},
+            optional=True, range_check=lambda x: 0 <= x <= 7),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Block loss',
+    }
+
+
+class TrafficSchedulerG(EntityClass):
+    class_id = 278
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ShortField("tcont_pointer", None), {AA.R}),
+        ECA(ShortField("traffic_scheduler_pointer", None), {AA.R}),
+        ECA(ByteField("policy", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 2),
+        ECA(ByteField("priority_weight", 0), {AA.R, AA.W}),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+
+
+class MulticastGemInterworkingTp(EntityClass):
+    class_id = 281
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC},
+            range_check=lambda x: x != OmciNullPointer),
+        ECA(ShortField("gem_port_network_ctp_pointer", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interworking_option", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: x in [0, 1, 3, 5]),
+        ECA(ShortField("service_profile_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("interworking_tp_pointer", 0), {AA.R, AA.W, AA.SBC},
+            deprecated=True),
+        ECA(ByteField("pptp_counter", None), {AA.R}),
+        ECA(ByteField("operational_state", None), {AA.R}, avc=True,
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("gal_profile_pointer", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("gal_loopback_configuration", None), {AA.R, AA.W, AA.SBC},
+            deprecated=True),
+        # TODO add multicast_address_table here (page 85 of spec.)
+        # ECA(...("multicast_address_table", None), {AA.R, AA.W})
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.GetNext, OP.Set}
+    optional_operations = {OP.SetTable}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'Deprecated',
+    }
+
+
+class AccessControlRow0(Packet):
+    name = "AccessControlRow0"
+    fields_desc = [
+        BitField("set_ctrl", 0, 2),
+        BitField("row_part_id", 0, 3),
+        BitField("test", 0, 1),
+        BitField("row_key", 0, 10),
+
+        ShortField("gem_port_id", None),
+        ShortField("vlan_id", None),
+        IPField("src_ip", None),
+        IPField("dst_ip_start", None),
+        IPField("dst_ip_end", None),
+        IntField("ipm_group_bw", None),
+        ShortField("reserved0", 0)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class AccessControlRow1(Packet):
+    name = "AccessControlRow1"
+    fields_desc = [
+        BitField("set_ctrl", 0, 2),
+        BitField("row_part_id", 0, 3),
+        BitField("test", 0, 1),
+        BitField("row_key", 0, 10),
+
+        StrFixedLenField("ipv6_src_addr_start_bytes", None, 12),
+        ShortField("preview_length", None),
+        ShortField("preview_repeat_time", None),
+        ShortField("preview_repeat_count", None),
+        ShortField("preview_reset_time", None),
+        ShortField("reserved1", 0)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class AccessControlRow2(Packet):
+    name = "AccessControlRow2"
+    fields_desc = [
+        BitField("set_ctrl", 0, 2),
+        BitField("row_part_id", 0, 3),
+        BitField("test", 0, 1),
+        BitField("row_key", 0, 10),
+
+        StrFixedLenField("ipv6_dst_addr_start_bytes", None, 12),
+        StrFixedLenField("reserved2", None, 10)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class DownstreamIgmpMulticastTci(Packet):
+    name = "DownstreamIgmpMulticastTci"
+    fields_desc = [
+        ByteField("ctrl_type", None),
+        ShortField("tci", None)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class MulticastOperationsProfile(EntityClass):
+    class_id = 309
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC},
+            range_check=lambda x: x != 0 and x != OmciNullPointer),
+        ECA(ByteField("igmp_version", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: x in [1, 2, 3, 16, 17]),
+        ECA(ByteField("igmp_function", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 2),
+        ECA(ByteField("immediate_leave", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("us_igmp_tci", None), {AA.R, AA.W, AA.SBC}, optional=True),
+        ECA(ByteField("us_igmp_tag_ctrl", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 3, optional=True),
+        ECA(IntField("us_igmp_rate", None), {AA.R, AA.W, AA.SBC}, optional=True),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "dynamic_access_control_list_table", None, 24), {AA.R, AA.W}),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "static_access_control_list_table", None, 24), {AA.R, AA.W}),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField("lost_groups_list_table", None, 10), {AA.R}),
+        ECA(ByteField("robustness", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("querier_ip", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("query_interval", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("querier_max_response_time", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("last_member_response_time", 10), {AA.R, AA.W}),
+        ECA(ByteField("unauthorized_join_behaviour", None), {AA.R, AA.W}),
+        ECA(StrFixedLenField("ds_igmp_mcast_tci", None, 3), {AA.R, AA.W, AA.SBC}, optional=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Set, OP.Get, OP.GetNext}
+    optional_operations = {OP.SetTable}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Lost multicast group',
+    }
+
+
+class MulticastServicePackage(Packet):
+    name = "MulticastServicePackage"
+    fields_desc = [
+        BitField("set_ctrl", 0, 2),
+        BitField("reserved0", 0, 4),
+        BitField("row_key", 0, 10),
+
+        ShortField("vid_uni", None),
+        ShortField("max_simultaneous_groups", None),
+        IntField("max_multicast_bw", None),
+        ShortField("mcast_operations_profile_pointer", None),
+        StrFixedLenField("reserved1", None, 8)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class AllowedPreviewGroupsRow0(Packet):
+    name = "AllowedPreviewGroupsRow0"
+    fields_desc = [
+        BitField("set_ctrl", 0, 2),
+        BitField("row_part_id", 0, 3),
+        BitField("reserved0", 0, 1),
+        BitField("row_key", 0, 10),
+
+        StrFixedLenField("ipv6_pad", 0, 12),
+        IPField("src_ip", None),
+        ShortField("vlan_id_ani", None),
+        ShortField("vlan_id_uni", None)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class AllowedPreviewGroupsRow1(Packet):
+    name = "AllowedPreviewGroupsRow1"
+    fields_desc = [
+        BitField("set_ctrl", 0, 2),
+        BitField("row_part_id", 0, 3),
+        BitField("reserved0", 0, 1),
+        BitField("row_key", 0, 10),
+
+        StrFixedLenField("ipv6_pad", 0, 12),
+        IPField("dst_ip", None),
+        ShortField("duration", None),
+        ShortField("time_left", None)
+    ]
+
+    def to_json(self):
+        return json.dumps(self.fields, separators=(',', ':'))
+
+
+class MulticastSubscriberConfigInfo(EntityClass):
+    class_id = 310
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("me_type", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ShortField("mcast_operations_profile_pointer", None),
+            {AA.R, AA.W, AA.SBC}),
+        ECA(ShortField("max_simultaneous_groups", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("max_multicast_bandwidth", None), {AA.R, AA.W, AA.SBC}),
+        ECA(ByteField("bandwidth_enforcement", None), {AA.R, AA.W, AA.SBC},
+            range_check=lambda x: 0 <= x <= 1),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "multicast_service_package_table", None, 20), {AA.R, AA.W}),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "allowed_preview_groups_table", None, 22), {AA.R, AA.W}),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Set, OP.Get, OP.GetNext,
+                            OP.SetTable}
+
+
+class VirtualEthernetInterfacePt(EntityClass):
+    class_id = 329
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x != 0 and x != OmciNullPointer),
+        ECA(ByteField("administrative_state", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("operational_state", None), {AA.R}, avc=True,
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(StrFixedLenField(
+            "interdomain_name", None, 25), {AA.R, AA.W}, optional=True),
+        ECA(ShortField("tcp_udp_pointer", None), {AA.R, AA.W}, optional=True),
+        ECA(ShortField("iana_assigned_port", None), {AA.R}),
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'Connecting function fail',
+    }
+
+
+class Omci(EntityClass):
+    class_id = 287
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R},
+            range_check=lambda x: x == 0),
+
+        # TODO: Can this be expressed better in SCAPY, probably not?
+        # On the initial, Get request for either the me_type or message_type
+        # attributes, you will receive a 4 octet value (big endian) that is
+        # the number of octets to 'get-next' to fully load the desired
+        # attribute.  For a basic OMCI formatted message, that will be 29
+        # octets per get-request.
+        #
+        # For the me_type_table, these are 16-bit values (ME Class IDs)
+        #
+        # For the message_type_table, these are 8-bit values (Actions)
+
+        ECA(FieldListField("me_type_table", None, ByteField('', 0),
+                           count_from=lambda _: 29), {AA.R}),
+        ECA(FieldListField("message_type_table", None, ByteField('', 0),
+                           count_from=lambda _: 29), {AA.R}),
+    ]
+    mandatory_operations = {OP.Get, OP.GetNext}
+
+
+class EnhSecurityControl(EntityClass):
+    class_id = 332
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(BitField("olt_crypto_capabilities", None, 16*8), {AA.W}),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "olt_random_challenge_table", None, 17), {AA.R, AA.W}),
+        ECA(ByteField("olt_challenge_status", 0), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("onu_selected_crypto_capabilities", None), {AA.R}),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "onu_random_challenge_table", None, 16), {AA.R}, avc=True),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "onu_authentication_result_table", None, 16), {AA.R}, avc=True),
+        # TODO: need to make table and add column data
+        ECA(StrFixedLenField(
+            "olt_authentication_result_table", None, 17), {AA.W}),
+        ECA(ByteField("olt_result_status", None), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("onu_authentication_status", None), {AA.R}, avc=True,
+            range_check=lambda x: 0 <= x <= 5),
+        ECA(StrFixedLenField(
+            "master_session_key_name", None, 16), {AA.R}),
+        ECA(StrFixedLenField(
+            "broadcast_key_table", None, 18), {AA.R, AA.W}),
+        ECA(ShortField("effective_key_length", None), {AA.R}),
+
+    ]
+    mandatory_operations = {OP.Set, OP.Get, OP.GetNext}
+    notifications = {OP.AttributeValueChange}
+
+
+class EthernetPMMonitoringHistoryData(EntityClass):
+    class_id = 24
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("fcs_errors", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("excessive_collision_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("late_collision_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("frames_too_long", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("buffer_overflows_on_rx", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("buffer_overflows_on_tx", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("single_collision_frame_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("multiple_collisions_frame_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("sqe_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("deferred_tx_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("internal_mac_tx_error_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("carrier_sense_error_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("alignment_error_counter", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("internal_mac_rx_error_counter", None), {AA.R}, tca=True, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set, OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'FCS errors',
+        1: 'Excessive collision counter',
+        2: 'Late collision counter',
+        3: 'Frames too long',
+        4: 'Buffer overflows on receive',
+        5: 'Buffer overflows on transmit',
+        6: 'Single collision frame counter',
+        7: 'Multiple collision frame counter',
+        8: 'SQE counter',
+        9: 'Deferred transmission counter',
+        10: 'Internal MAC transmit error counter',
+        11: 'Carrier sense error counter',
+        12: 'Alignment error counter',
+        13: 'Internal MAC receive error counter',
+    }
+
+
+class FecPerformanceMonitoringHistoryData(EntityClass):
+    class_id = 312
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("corrected_bytes", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("corrected_code_words", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("uncorrectable_code_words", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("total_code_words", None), {AA.R}, counter=True),
+        ECA(ShortField("fec_seconds", None), {AA.R}, tca=True, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set, OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Corrected bytes',
+        1: 'Corrected code words',
+        2: 'Uncorrectable code words',
+        4: 'FEC seconds',
+    }
+
+
+class EthernetFrameDownstreamPerformanceMonitoringHistoryData(EntityClass):
+    class_id = 321
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("drop_events", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("octets", None), {AA.R}, counter=True),
+        ECA(IntField("packets", None), {AA.R}, counter=True),
+        ECA(IntField("broadcast_packets", None), {AA.R}, counter=True),
+        ECA(IntField("multicast_packets", None), {AA.R}, counter=True),
+        ECA(IntField("crc_errored_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("undersize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("oversize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("64_octets", None), {AA.R}, counter=True),
+        ECA(IntField("65_to_127_octets", None), {AA.R}, counter=True),
+        ECA(IntField("128_to_255_octets", None), {AA.R}, counter=True),
+        ECA(IntField("256_to_511_octets", None), {AA.R}, counter=True),
+        ECA(IntField("512_to_1023_octets", None), {AA.R}, counter=True),
+        ECA(IntField("1024_to_1518_octets", None), {AA.R}, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set, OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Drop events',
+        1: 'CRC errored packets',
+        2: 'Undersize packets',
+        3: 'Oversize packets',
+    }
+
+
+class EthernetFrameUpstreamPerformanceMonitoringHistoryData(EntityClass):
+    class_id = 322
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("drop_events", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("octets", None), {AA.R}, counter=True),
+        ECA(IntField("packets", None), {AA.R}, counter=True),
+        ECA(IntField("broadcast_packets", None), {AA.R}, counter=True),
+        ECA(IntField("multicast_packets", None), {AA.R}, counter=True),
+        ECA(IntField("crc_errored_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("undersize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("oversize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("64_octets", None), {AA.R}, counter=True),
+        ECA(IntField("65_to_127_octets", None), {AA.R}, counter=True),
+        ECA(IntField("128_to_255_octets", None), {AA.R}, counter=True),
+        ECA(IntField("256_to_511_octets", None), {AA.R}, counter=True),
+        ECA(IntField("512_to_1023_octets", None), {AA.R}, counter=True),
+        ECA(IntField("1024_to_1518_octets", None), {AA.R}, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set, OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Drop events',
+        1: 'CRC errored packets',
+        2: 'Undersize packets',
+        3: 'Oversize packets',
+    }
+
+
+class VeipUni(EntityClass):
+    class_id = 329
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R}),
+        ECA(ByteField("administrative_state", 1), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1),
+        ECA(ByteField("operational_state", 1), {AA.R, AA.W},
+            range_check=lambda x: 0 <= x <= 1, optional=True, avc=True),
+        ECA(StrFixedLenField("interdomain_name", None, 25), {AA.R, AA.W},
+            optional=True),
+        ECA(ShortField("tcp_udp_pointer", None), {AA.R, AA.W}, optional=True),
+        ECA(ShortField("iana_assigned_port", 0xFFFF), {AA.R})
+    ]
+    mandatory_operations = {OP.Get, OP.Set}
+    notifications = {OP.AttributeValueChange, OP.AlarmNotification}
+    alarms = {
+        0: 'Connecting function fail'
+    }
+
+
+class EthernetFrameExtendedPerformanceMonitoring(EntityClass):
+    class_id = 334
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        # 2-octet field -> Threshold data 1/2 ID
+        # 2-octet field -> Parent ME Class
+        # 2-octet field -> Parent ME Instance
+        # 2-octet field -> Accumulation disable
+        # 2-octet field -> TCA Disable
+        # 2-octet field -> Control fields bitmap
+        # 2-octet field -> TCI
+        # 2-octet field -> Reserved
+        ECA(FieldListField("control_block", None, ShortField('', 0),
+                           count_from=lambda _: 8), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("drop_events", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("octets", None), {AA.R}, counter=True),
+        ECA(IntField("packets", None), {AA.R}, counter=True),
+        ECA(IntField("broadcast_packets", None), {AA.R}, counter=True),
+        ECA(IntField("multicast_packets", None), {AA.R}, counter=True),
+        ECA(IntField("crc_errored_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("undersize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("oversize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("64_octets", None), {AA.R}, counter=True),
+        ECA(IntField("65_to_127_octets", None), {AA.R}, counter=True),
+        ECA(IntField("128_to_255_octets", None), {AA.R}, counter=True),
+        ECA(IntField("256_to_511_octets", None), {AA.R}, counter=True),
+        ECA(IntField("512_to_1023_octets", None), {AA.R}, counter=True),
+        ECA(IntField("1024_to_1518_octets", None), {AA.R}, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    optional_operations = {OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Drop events',
+        1: 'CRC errored packets',
+        2: 'Undersize packets',
+        3: 'Oversize packets',
+    }
+
+
+class EthernetFrameExtendedPerformanceMonitoring64Bit(EntityClass):
+    class_id = 426
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        # 2-octet field -> Threshold data 1/2 ID
+        # 2-octet field -> Parent ME Class
+        # 2-octet field -> Parent ME Instance
+        # 2-octet field -> Accumulation disable
+        # 2-octet field -> TCA Disable
+        # 2-octet field -> Control fields bitmap
+        # 2-octet field -> TCI
+        # 2-octet field -> Reserved
+        ECA(FieldListField("control_block", None, ShortField('', 0),
+                           count_from=lambda _: 8), {AA.R, AA.W, AA.SBC}),
+        ECA(LongField("drop_events", None), {AA.R}, tca=True, counter=True),
+        ECA(LongField("octets", None), {AA.R}, counter=True),
+        ECA(LongField("packets", None), {AA.R}, counter=True),
+        ECA(LongField("broadcast_packets", None), {AA.R}, counter=True),
+        ECA(LongField("multicast_packets", None), {AA.R}, counter=True),
+        ECA(LongField("crc_errored_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(LongField("undersize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(LongField("oversize_packets", None), {AA.R}, tca=True, counter=True),
+        ECA(LongField("64_octets", None), {AA.R}, counter=True),
+        ECA(LongField("65_to_127_octets", None), {AA.R}, counter=True),
+        ECA(LongField("128_to_255_octets", None), {AA.R}, counter=True),
+        ECA(LongField("256_to_511_octets", None), {AA.R}, counter=True),
+        ECA(LongField("512_to_1023_octets", None), {AA.R}, counter=True),
+        ECA(LongField("1024_to_1518_octets", None), {AA.R}, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    optional_operations = {OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        0: 'Drop events',
+        1: 'CRC errored packets',
+        2: 'Undersize packets',
+        3: 'Oversize packets',
+    }
+
+
+class GemPortNetworkCtpMonitoringHistoryData(EntityClass):
+    class_id = 341
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("transmitted_gem_frames", None), {AA.R}, counter=True),
+        ECA(IntField("received_gem_frames", None), {AA.R}, counter=True),
+        ECA(LongField("received_payload_bytes", None), {AA.R}, counter=True),
+        ECA(LongField("transmitted_payload_bytes", None), {AA.R}, counter=True),
+        ECA(IntField("encryption_key_errors", None), {AA.R}, tca=True, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set, OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        1: 'Encryption key errors',
+    }
+
+
+class XgPonTcPerformanceMonitoringHistoryData(EntityClass):
+    class_id = 344
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("psbd_hec_error_count", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("xgtc_hec_error_count", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("unknown_profile_count", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("transmitted_xgem_frames", None), {AA.R}, counter=True),
+        ECA(IntField("fragment_xgem_frames", None), {AA.R}, counter=True),
+        ECA(IntField("xgem_hec_lost_words_count", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("xgem_key_errors", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("xgem_hec_error_count", None), {AA.R}, tca=True, counter=True)
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    optional_operations = {OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        1: 'PSBd HEC error count',
+        2: 'XGTC HEC error count',
+        3: 'Unknown profile count',
+        4: 'XGEM HEC loss count',
+        5: 'XGEM key errors',
+        6: 'XGEM HEC error count',
+    }
+
+
+class XgPonDownstreamPerformanceMonitoringHistoryData(EntityClass):
+    class_id = 345
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R},),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("ploam_mic_error_count", None), {AA.R}, tca=True, counter=True),
+        ECA(IntField("downstream_ploam_messages_count", None), {AA.R}, counter=True),
+        ECA(IntField("profile_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("ranging_time_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("deactivate_onu_id_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("disable_serial_number_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("request_registration_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("assign_alloc_id_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("key_control_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("sleep_allow_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("baseline_omci_messages_received_count", None), {AA.R}, counter=True),
+        ECA(IntField("extended_omci_messages_received_count", None), {AA.R}, counter=True),
+        ECA(IntField("assign_onu_id_messages_received", None), {AA.R}, counter=True),
+        ECA(IntField("omci_mic_error_count", None), {AA.R}, tca=True, counter=True),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    optional_operations = {OP.GetCurrentData}
+    notifications = {OP.AlarmNotification}
+    alarms = {
+        1: 'PLOAM MIC error count',
+        2: 'OMCI MIC error count',
+    }
+
+
+class XgPonUpstreamPerformanceMonitoringHistoryData(EntityClass):
+    class_id = 346
+    hidden = True
+    attributes = [
+        ECA(ShortField("managed_entity_id", None), {AA.R, AA.SBC}),
+        ECA(ByteField("interval_end_time", None), {AA.R}),
+        ECA(ShortField("threshold_data_1_2_id", None), {AA.R, AA.W, AA.SBC}),
+        ECA(IntField("upstream_ploam_message_count", None), {AA.R}, counter=True),
+        ECA(IntField("serial_number_onu_message_count", None), {AA.R}, counter=True),
+        ECA(IntField("registration_message_count", None), {AA.R}, counter=True),
+        ECA(IntField("key_report_message_count", None), {AA.R}, counter=True),
+        ECA(IntField("acknowledge_message_count", None), {AA.R}, counter=True),
+        ECA(IntField("sleep_request_message_count", None), {AA.R}, counter=True),
+    ]
+    mandatory_operations = {OP.Create, OP.Delete, OP.Get, OP.Set}
+    optional_operations = {OP.GetCurrentData}
+
+
+# entity class lookup table from entity_class values
+entity_classes_name_map = dict(
+    inspect.getmembers(sys.modules[__name__],
+    lambda o: inspect.isclass(o) and \
+              issubclass(o, EntityClass) and \
+              o is not EntityClass)
+)
+
+entity_classes = [c for c in entity_classes_name_map.itervalues()]
+entity_id_to_class_map = dict((c.class_id, c) for c in entity_classes)
diff --git a/python/extensions/omci/omci_fields.py b/python/extensions/omci/omci_fields.py
new file mode 100644
index 0000000..b6ccf5e
--- /dev/null
+++ b/python/extensions/omci/omci_fields.py
@@ -0,0 +1,239 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import binascii
+import json
+from scapy.fields import Field, StrFixedLenField, PadField, IntField, FieldListField, ByteField, StrField, \
+    StrFixedLenField, PacketField
+from scapy.packet import Raw
+
+class FixedLenField(PadField):
+    """
+    This Pad field limits parsing of its content to its size
+    """
+    def __init__(self, fld, align, padwith='\x00'):
+        super(FixedLenField, self).__init__(fld, align, padwith)
+
+    def getfield(self, pkt, s):
+        remain, val = self._fld.getfield(pkt, s[:self._align])
+        if isinstance(val.payload, Raw) and \
+                not val.payload.load.replace(self._padwith, ''):
+            # raw payload is just padding
+            val.remove_payload()
+        return remain + s[self._align:], val
+
+class StrCompoundField(Field):
+    __slots__ = ['flds']
+
+    def __init__(self, name, flds):
+        super(StrCompoundField, self).__init__(name=name, default=None, fmt='s')
+        self.flds = flds
+        for fld in self.flds:
+            assert not fld.holds_packets, 'compound field cannot have packet field members'
+
+    def addfield(self, pkt, s, val):
+        for fld in self.flds:
+            # run though fake add/get to consume the relevant portion of the input value for this field
+            x, extracted = fld.getfield(pkt, fld.addfield(pkt, '', val))
+            l = len(extracted)
+            s = fld.addfield(pkt, s, val[0:l])
+            val = val[l:]
+        return s;
+
+    def getfield(self, pkt, s):
+        data = ''
+        for fld in self.flds:
+            s, value = fld.getfield(pkt, s)
+            if not isinstance(value, str):
+                value = fld.i2repr(pkt, value)
+            data += value
+        return s, data
+
+class XStrFixedLenField(StrFixedLenField):
+    """
+    XStrFixedLenField which value is printed as hexadecimal.
+    """
+    def i2m(self, pkt, x):
+        l = self.length_from(pkt) * 2
+        return None if x is None else binascii.a2b_hex(x)[0:l+1]
+
+    def m2i(self, pkt, x):
+        return None if x is None else binascii.b2a_hex(x)
+
+class MultipleTypeField(object):
+    """MultipleTypeField are used for fields that can be implemented by
+        various Field subclasses, depending on conditions on the packet.
+
+        It is initialized with `flds` and `default`.
+
+        `default` is the default field type, to be used when none of the
+        conditions matched the current packet.
+
+        `flds` is a list of tuples (`fld`, `cond`), where `fld` if a field
+        type, and `cond` a "condition" to determine if `fld` is the field type
+        that should be used.
+
+        `cond` is either:
+
+        - a callable `cond_pkt` that accepts one argument (the packet) and
+            returns True if `fld` should be used, False otherwise.
+
+          - a tuple (`cond_pkt`, `cond_pkt_val`), where `cond_pkt` is the same
+            as in the previous case and `cond_pkt_val` is a callable that
+            accepts two arguments (the packet, and the value to be set) and
+            returns True if `fld` should be used, False otherwise.
+
+        See scapy.layers.l2.ARP (type "help(ARP)" in Scapy) for an example of
+        use.
+    """
+
+    __slots__ = ["flds", "default", "name"]
+
+    def __init__(self, flds, default):
+        self.flds  = flds
+        self.default = default
+        self.name = self.default.name
+
+    def _find_fld_pkt(self, pkt):
+        """Given a Packet instance `pkt`, returns the Field subclass to be
+            used. If you know the value to be set (e.g., in .addfield()), use
+            ._find_fld_pkt_val() instead.
+        """
+        for fld, cond in self.flds:
+            if isinstance(cond, tuple):
+                cond = cond[0]
+            if cond(pkt):
+                return fld
+        return self.default
+
+    def _find_fld_pkt_val(self, pkt, val):
+        """Given a Packet instance `pkt` and the value `val` to be set,
+            returns the Field subclass to be used.
+        """
+        for fld, cond in self.flds:
+            if isinstance(cond, tuple):
+                if cond[1](pkt, val):
+                    return fld
+            elif cond(pkt):
+                return fld
+        return self.default
+
+    def getfield(self, pkt, s):
+        return self._find_fld_pkt(pkt).getfield(pkt, s)
+
+    def addfield(self, pkt, s, val):
+        return self._find_fld_pkt_val(pkt, val).addfield(pkt, s, val)
+
+    def any2i(self, pkt, val):
+        return self._find_fld_pkt_val(pkt, val).any2i(pkt, val)
+
+    def h2i(self, pkt, val):
+        return self._find_fld_pkt_val(pkt, val).h2i(pkt, val)
+
+    def i2h(self, pkt, val):
+        return self._find_fld_pkt_val(pkt, val).i2h(pkt, val)
+
+    def i2m(self, pkt, val):
+        return self._find_fld_pkt_val(pkt, val).i2m(pkt, val)
+
+    def i2len(self, pkt, val):
+        return self._find_fld_pkt_val(pkt, val).i2len(pkt, val)
+
+    def i2repr(self, pkt, val):
+        return self._find_fld_pkt_val(pkt, val).i2repr(pkt, val)
+
+    def register_owner(self, cls):
+        for fld, _ in self.flds:
+            fld.owners.append(cls)
+        self.dflt.owners.append(cls)
+
+    def __getattr__(self, attr):
+        return getattr(self._find_fld(), attr)
+
+class OmciSerialNumberField(StrCompoundField):
+    def __init__(self, name, default=None):
+        assert default is None or (isinstance(default, str) and len(default) == 12), 'invalid default serial number'
+        vendor_default = default[0:4] if default is not None else None
+        vendor_serial_default = default[4:12] if default is not None else None
+        super(OmciSerialNumberField, self).__init__(name,
+            [StrFixedLenField('vendor_id', vendor_default, 4),
+            XStrFixedLenField('vendor_serial_number', vendor_serial_default, 4)])
+
+class OmciTableField(MultipleTypeField):
+    def __init__(self, tblfld):
+        assert isinstance(tblfld, PacketField)
+        assert hasattr(tblfld.cls, 'index'), 'No index() method defined for OmciTableField row object'
+        assert hasattr(tblfld.cls, 'is_delete'), 'No delete() method defined for OmciTableField row object'
+        super(OmciTableField, self).__init__(
+            [
+            (IntField('table_length', 0), (self.cond_pkt, self.cond_pkt_val)),
+            (PadField(StrField('me_type_table', None), OmciTableField.PDU_SIZE),
+                (self.cond_pkt2, self.cond_pkt_val2))
+            ], tblfld)
+
+    PDU_SIZE = 29 # Baseline message set raw get-next PDU size
+    OmciGetResponseMessageId = 0x29 # Ugh circular dependency
+    OmciGetNextResponseMessageId = 0x3a # Ugh circular dependency
+
+    def cond_pkt(self, pkt):
+        return pkt is not None and pkt.message_id == self.OmciGetResponseMessageId
+
+    def cond_pkt_val(self, pkt, val):
+        return pkt is not None and pkt.message_id == self.OmciGetResponseMessageId
+
+    def cond_pkt2(self, pkt):
+        return pkt is not None and pkt.message_id == self.OmciGetNextResponseMessageId
+
+    def cond_pkt_val2(self, pkt, val):
+        return pkt is not None and pkt.message_id == self.OmciGetNextResponseMessageId
+
+    def to_json(self, new_values, old_values_json):
+        if not isinstance(new_values, list): new_values = [new_values] # If setting a scalar, augment the old table
+        else: old_values_json = None # If setting a vector of new values, erase all old_values
+
+        key_value_pairs = dict()
+
+        old_table = self.load_json(old_values_json)
+        for old in old_table:
+            index = old.index()
+            key_value_pairs[index] = old
+        for new in new_values:
+            index = new.index()
+            if new.is_delete():
+                del key_value_pairs[index]
+            else:
+                key_value_pairs[index] = new
+
+        new_table = []
+        for k, v in sorted(key_value_pairs.iteritems()):
+            assert isinstance(v, self.default.cls), 'object type for Omci Table row object invalid'
+            new_table.append(v.fields)
+
+        str_values = json.dumps(new_table, separators=(',', ':'))
+
+        return str_values
+
+    def load_json(self, json_str):
+        if json_str is None: json_str = '[]'
+        json_values = json.loads(json_str)
+        key_value_pairs = dict()
+        for json_value in json_values:
+            v = self.default.cls(**json_value)
+            index = v.index()
+            key_value_pairs[index] = v
+        table = []
+        for k, v in sorted(key_value_pairs.iteritems()):
+            table.append(v)
+        return table
\ No newline at end of file
diff --git a/python/extensions/omci/omci_frame.py b/python/extensions/omci/omci_frame.py
new file mode 100644
index 0000000..c0d7d4a
--- /dev/null
+++ b/python/extensions/omci/omci_frame.py
@@ -0,0 +1,207 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from scapy.fields import ByteField, PacketField, IntField
+from scapy.fields import ShortField, ConditionalField
+from scapy.packet import Packet
+
+from voltha.extensions.omci.omci_fields import FixedLenField
+from voltha.extensions.omci.omci_messages import OmciCreate, OmciDelete, \
+    OmciDeleteResponse, OmciSet, OmciSetResponse, OmciGet, OmciGetResponse, \
+    OmciGetAllAlarms, OmciGetAllAlarmsResponse, OmciGetAllAlarmsNext, \
+    OmciMibResetResponse, OmciMibReset, OmciMibUploadNextResponse, \
+    OmciMibUploadNext, OmciMibUploadResponse, OmciMibUpload, \
+    OmciGetAllAlarmsNextResponse, OmciAttributeValueChange, \
+    OmciTestResult, OmciAlarmNotification, \
+    OmciReboot, OmciRebootResponse, OmciGetNext, OmciGetNextResponse, \
+    OmciSynchronizeTime, OmciSynchronizeTimeResponse, OmciGetCurrentData, \
+    OmciGetCurrentDataResponse, OmciStartSoftwareDownload, OmciStartSoftwareDownloadResponse, \
+    OmciDownloadSection, OmciDownloadSectionLast, OmciDownloadSectionResponse, \
+    OmciEndSoftwareDownload, OmciEndSoftwareDownloadResponse, \
+    OmciActivateImage, OmciActivateImageResponse, \
+    OmciCommitImage, OmciCommitImageResponse
+
+from voltha.extensions.omci.omci_messages import OmciCreateResponse
+
+
+class OmciFrame(Packet):
+    name = "OmciFrame"
+    fields_desc = [
+        ShortField("transaction_id", 0),
+        ByteField("message_type", None),
+        ByteField("omci", 0x0a),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciCreate), align=36),
+            lambda pkt: pkt.message_type == OmciCreate.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciCreateResponse), align=36),
+            lambda pkt: pkt.message_type == OmciCreateResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciDelete), align=36),
+            lambda pkt: pkt.message_type == OmciDelete.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciDeleteResponse), align=36),
+            lambda pkt: pkt.message_type == OmciDeleteResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciSet), align=36),
+            lambda pkt: pkt.message_type == OmciSet.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciSetResponse), align=36),
+            lambda pkt: pkt.message_type == OmciSetResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGet), align=36),
+            lambda pkt: pkt.message_type == OmciGet.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetResponse), align=36),
+            lambda pkt: pkt.message_type == OmciGetResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetAllAlarms), align=36),
+            lambda pkt: pkt.message_type == OmciGetAllAlarms.message_id),
+        ConditionalField(FixedLenField(
+            PacketField(
+                "omci_message", None, OmciGetAllAlarmsResponse), align=36),
+                lambda pkt:
+                pkt.message_type == OmciGetAllAlarmsResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetAllAlarmsNext), align=36),
+            lambda pkt: pkt.message_type == OmciGetAllAlarmsNext.message_id),
+        ConditionalField(FixedLenField(
+            PacketField(
+                "omci_message", None, OmciGetAllAlarmsNextResponse), align=36),
+                lambda pkt:
+                pkt.message_type == OmciGetAllAlarmsNextResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciMibUpload), align=36),
+            lambda pkt: pkt.message_type == OmciMibUpload.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciMibUploadResponse), align=36),
+            lambda pkt: pkt.message_type == OmciMibUploadResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciMibUploadNext), align=36),
+            lambda pkt:
+                pkt.message_type == OmciMibUploadNext.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciMibUploadNextResponse), align=36),
+            lambda pkt: pkt.message_type == OmciMibUploadNextResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciMibReset), align=36),
+            lambda pkt: pkt.message_type == OmciMibReset.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciMibResetResponse), align=36),
+            lambda pkt: pkt.message_type == OmciMibResetResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciAlarmNotification), align=36),
+            lambda pkt: pkt.message_type == OmciAlarmNotification.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciAttributeValueChange), align=36),
+            lambda pkt: pkt.message_type == OmciAttributeValueChange.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciTestResult), align=36),
+            lambda pkt: pkt.message_type == OmciTestResult.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciReboot), align=36),
+            lambda pkt: pkt.message_type == OmciReboot.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciRebootResponse), align=36),
+            lambda pkt: pkt.message_type == OmciRebootResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetNext), align=36),
+            lambda pkt: pkt.message_type == OmciGetNext.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetNextResponse), align=36),
+            lambda pkt: pkt.message_type == OmciGetNextResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciSynchronizeTime), align=36),
+            lambda pkt: pkt.message_type == OmciSynchronizeTime.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciSynchronizeTimeResponse), align=36),
+            lambda pkt: pkt.message_type == OmciSynchronizeTimeResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetCurrentData), align=36),
+            lambda pkt: pkt.message_type == OmciGetCurrentData.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciGetCurrentDataResponse), align=36),
+            lambda pkt: pkt.message_type == OmciGetCurrentDataResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciStartSoftwareDownload), align=36),
+            lambda pkt: pkt.message_type == OmciStartSoftwareDownload.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciStartSoftwareDownloadResponse), align=36),
+            lambda pkt: pkt.message_type == OmciStartSoftwareDownloadResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciDownloadSection), align=36),
+            lambda pkt: pkt.message_type == OmciDownloadSection.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciDownloadSectionLast), align=36),
+            lambda pkt: pkt.message_type == OmciDownloadSectionLast.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciDownloadSectionResponse), align=36),
+            lambda pkt: pkt.message_type == OmciDownloadSectionResponse.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciEndSoftwareDownload), align=36),
+            lambda pkt: pkt.message_type == OmciEndSoftwareDownload.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciEndSoftwareDownloadResponse), align=36),
+            lambda pkt: pkt.message_type == OmciEndSoftwareDownloadResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciActivateImage), align=36),
+            lambda pkt: pkt.message_type == OmciActivateImage.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciActivateImageResponse), align=36),
+            lambda pkt: pkt.message_type == OmciActivateImageResponse.message_id),
+
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciCommitImage), align=36),
+            lambda pkt: pkt.message_type == OmciCommitImage.message_id),
+        ConditionalField(FixedLenField(
+            PacketField("omci_message", None, OmciCommitImageResponse), align=36),
+            lambda pkt: pkt.message_type == OmciCommitImageResponse.message_id),
+
+        # TODO add entries for remaining OMCI message types
+
+        IntField("omci_trailer", 0x00000028)
+    ]
+
+    # We needed to patch the do_dissect(...) method of Packet, because
+    # it wiped out already dissected conditional fields with None if they
+    # referred to the same field name. We marked the only new line of code
+    # with "Extra condition added".
+    def do_dissect(self, s):
+        raw = s
+        self.raw_packet_cache_fields = {}
+        for f in self.fields_desc:
+            if not s:
+                break
+            s, fval = f.getfield(self, s)
+            # We need to track fields with mutable values to discard
+            # .raw_packet_cache when needed.
+            if f.islist or f.holds_packets:
+                self.raw_packet_cache_fields[f.name] = f.do_copy(fval)
+            # Extra condition added
+            if fval is not None or f.name not in self.fields:
+                self.fields[f.name] = fval
+        assert(raw.endswith(s))
+        self.raw_packet_cache = raw[:-len(s)] if s else raw
+        self.explicit = 1
+        return s
diff --git a/python/extensions/omci/omci_me.py b/python/extensions/omci/omci_me.py
new file mode 100644
index 0000000..a8a2d05
--- /dev/null
+++ b/python/extensions/omci/omci_me.py
@@ -0,0 +1,939 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""
+OMCI Managed Entity Frame support
+"""
+from voltha.extensions.omci.omci import *
+from voltha.extensions.omci.me_frame import MEFrame
+
+
+class CardholderFrame(MEFrame):
+    """
+    This managed entity represents fixed equipment slot configuration
+    for the ONU
+    """
+    def __init__(self, single, slot_number, attributes):
+        """
+        :param single:(bool) True if the ONU is a single piece of integrated equipment,
+                             False if the ONU contains pluggable equipment modules
+        :param slot_number: (int) slot number (0..254)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        # Validate
+        MEFrame.check_type(single, bool)
+        MEFrame.check_type(slot_number, int)
+        if not 0 <= slot_number <= 254:
+            raise ValueError('slot_number should be 0..254')
+
+        entity_id = 256 + slot_number if single else slot_number
+
+        super(CardholderFrame, self).__init__(Cardholder, entity_id,
+                                              MEFrame._attr_to_data(attributes))
+
+
+class CircuitPackFrame(MEFrame):
+    """
+    This managed entity models a real or virtual circuit pack that is equipped in
+    a real or virtual ONU slot.
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Its value is the same as that
+                                of the cardholder managed entity containing this
+                                circuit pack instance. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(CircuitPackFrame, self).__init__(CircuitPack, entity_id,
+                                               MEFrame._attr_to_data(attributes))
+
+
+class ExtendedVlanTaggingOperationConfigurationDataFrame(MEFrame):
+    """
+    This managed entity organizes data associated with VLAN tagging. Regardless
+    of its point of attachment, the specified tagging operations refer to the
+     upstream direction.
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Its value is the same as that
+                                of the cardholder managed entity containing this
+                                circuit pack instance. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(ExtendedVlanTaggingOperationConfigurationDataFrame,
+              self).__init__(ExtendedVlanTaggingOperationConfigurationData,
+                             entity_id,
+                             MEFrame._attr_to_data(attributes))
+
+
+class IpHostConfigDataFrame(MEFrame):
+    """
+    The IP host config data configures IPv4 based services offered on the ONU.
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(IpHostConfigDataFrame, self).__init__(IpHostConfigData,
+                                                    entity_id,
+                                                    MEFrame._attr_to_data(attributes))
+
+
+class GalEthernetProfileFrame(MEFrame):
+    """
+    This managed entity organizes data that describe the GTC adaptation layer
+    processing functions of the ONU for Ethernet services.
+    """
+    def __init__(self, entity_id, max_gem_payload_size=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param max_gem_payload_size: (int) This attribute defines the maximum payload
+                                     size generated in the associated GEM interworking
+                                     termination point managed entity. (0..65535
+        """
+        MEFrame.check_type(max_gem_payload_size, (int, type(None)))
+        if max_gem_payload_size is not None and not 0 <= max_gem_payload_size <= 0xFFFF:  # TODO: verify min/max
+            raise ValueError('max_gem_payload_size should be 0..0xFFFF')
+
+        data = None if max_gem_payload_size is None else\
+            {
+                'max_gem_payload_size': max_gem_payload_size
+            }
+        super(GalEthernetProfileFrame, self).__init__(GalEthernetProfile,
+                                                      entity_id,
+                                                      data)
+
+
+class GemInterworkingTpFrame(MEFrame):
+    """
+    An instance of this managed entity represents a point in the ONU where the
+    interworking of a bearer service (usually Ethernet) to the GEM layer takes
+    place.
+    """
+    def __init__(self, entity_id,
+                 gem_port_network_ctp_pointer=None,
+                 interworking_option=None,
+                 service_profile_pointer=None,
+                 interworking_tp_pointer=None,
+                 pptp_counter=None,
+                 gal_profile_pointer=None,
+                 attributes=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param gem_port_network_ctp_pointer: (int) This attribute points to an instance of
+                                                 the GEM port network CTP. (0..65535)
+
+        :param interworking_option: (int) This attribute identifies the type
+                                of non-GEM function that is being interworked.
+                                The options are:
+                                    0 Circuit-emulated TDM
+                                    1 MAC bridged LAN
+                                    2 Reserved
+                                    3 Reserved
+                                    4 Video return path
+                                    5 IEEE 802.1p mapper
+                                    6 Downstream broadcast
+                                    7 MPLS PW TDM service
+
+        :param service_profile_pointer: (int) This attribute points to an instance of
+                                              a service profile.
+                            CES service profile                 if interworking option = 0
+                            MAC bridge service profile          if interworking option = 1
+                            Video return path service profile   if interworking option = 4
+                            IEEE 802.1p mapper service profile  if interworking option = 5
+                            Null pointer                        if interworking option = 6
+                            CES service profile                 if interworking option = 7
+
+        :param interworking_tp_pointer: (int) This attribute is used for the circuit
+                                              emulation service and IEEE 802.1p mapper
+                                              service without a MAC bridge.
+
+        :param gal_profile_pointer: (int) This attribute points to an instance of
+                                              a service profile.
+
+        :param attributes: (basestring, list, set, dict) additional ME attributes.
+                           not specifically specified as a parameter. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified..
+        """
+        # Validate
+        self.check_type(gem_port_network_ctp_pointer, (int, type(None)))
+        self.check_type(interworking_option, (int, type(None)))
+        self.check_type(service_profile_pointer, (int, type(None)))
+        self.check_type(interworking_tp_pointer,(int, type(None)))
+        self.check_type(pptp_counter,(int, type(None)))
+        self.check_type(gal_profile_pointer, (int, type(None)))
+
+        if gem_port_network_ctp_pointer is not None and not 0 <= gem_port_network_ctp_pointer <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('gem_port_network_ctp_pointer should be 0..0xFFFE')
+
+        if interworking_option is not None and not 0 <= interworking_option <= 7:
+            raise ValueError('interworking_option should be 0..7')
+
+        if service_profile_pointer is not None and not 0 <= service_profile_pointer <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('service_profile_pointer should be 0..0xFFFE')
+
+        if interworking_tp_pointer is not None and not 0 <= interworking_tp_pointer <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('interworking_tp_pointer should be 0..0xFFFE')
+
+        if pptp_counter is not None and not 0 <= pptp_counter <= 255:  # TODO: Verify max
+            raise ValueError('pptp_counter should be 0..255')
+
+        if gal_profile_pointer is not None and not 0 <= gal_profile_pointer <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('gal_profile_pointer should be 0..0xFFFE')
+
+        data = MEFrame._attr_to_data(attributes)
+
+        if gem_port_network_ctp_pointer is not None or \
+                interworking_option is not None or \
+                service_profile_pointer is not None or \
+                interworking_tp_pointer is not None or \
+                gal_profile_pointer is not None:
+
+            data = data or dict()
+
+            if gem_port_network_ctp_pointer is not None:
+                data['gem_port_network_ctp_pointer'] = gem_port_network_ctp_pointer
+
+            if interworking_option is not None:
+                data['interworking_option'] = interworking_option
+
+            if service_profile_pointer is not None:
+                data['service_profile_pointer'] = service_profile_pointer
+
+            if interworking_tp_pointer is not None:
+                data['interworking_tp_pointer'] = interworking_tp_pointer
+
+            if gal_profile_pointer is not None:
+                data['gal_profile_pointer'] = gal_profile_pointer
+
+        super(GemInterworkingTpFrame, self).__init__(GemInterworkingTp,
+                                                     entity_id,
+                                                     data)
+
+
+class GemPortNetworkCtpFrame(MEFrame):
+    """
+    This managed entity represents the termination of a GEM port on an ONU.
+    """
+    def __init__(self, entity_id, port_id=None, tcont_id=None,
+                 direction=None, upstream_tm=None, attributes=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param port_id: (int) This attribute is the port-ID of the GEM port associated
+                              with this CTP
+
+        :param tcont_id: (int) This attribute points to a T-CONT instance
+
+        :param direction: (string) Data direction.  Valid values are:
+                                   'upstream'       - UNI-to-ANI
+                                   'downstream'     - ANI-to-UNI
+                                   'bi-directional' - guess :-)
+
+        :param upstream_tm: (int) If the traffic management option attribute in
+                                  the ONU-G ME is 0 (priority controlled) or 2
+                                  (priority and rate controlled), this pointer
+                                  specifies the priority queue ME serving this GEM
+                                  port network CTP. If the traffic management
+                                  option attribute is 1 (rate controlled), this
+                                  attribute redundantly points to the T-CONT serving
+                                  this GEM port network CTP.
+
+        :param attributes: (basestring, list, set, dict) additional ME attributes.
+                           not specifically specified as a parameter. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        _directions = {"upstream": 1, "downstream": 2, "bi-directional": 3}
+
+        # Validate
+        self.check_type(port_id, (int, type(None)))
+        self.check_type(tcont_id, (int, type(None)))
+        self.check_type(direction, (basestring, type(None)))
+        self.check_type(upstream_tm, (int, type(None)))
+
+        if port_id is not None and not 0 <= port_id <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('port_id should be 0..0xFFFE')
+
+        if tcont_id is not None and not 0 <= tcont_id <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('tcont_id should be 0..0xFFFE')
+
+        if direction is not None and str(direction).lower() not in _directions:
+            raise ValueError('direction should one of {}'.format(_directions.keys()))
+
+        if upstream_tm is not None and not 0 <= upstream_tm <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('upstream_tm should be 0..0xFFFE')
+
+        data = MEFrame._attr_to_data(attributes)
+
+        if port_id is not None or tcont_id is not None or\
+                direction is not None or upstream_tm is not None:
+
+            data = data or dict()
+
+            if port_id is not None:
+                data['port_id'] = port_id
+            if tcont_id is not None:
+                data['tcont_pointer'] = tcont_id
+            if direction is not None:
+                data['direction'] = _directions[str(direction).lower()]
+            if upstream_tm is not None:
+                data['traffic_management_pointer_upstream'] = upstream_tm
+
+        super(GemPortNetworkCtpFrame, self).__init__(GemPortNetworkCtp,
+                                                     entity_id,
+                                                     data)
+
+
+class Ieee8021pMapperServiceProfileFrame(MEFrame):
+    """
+    This managed entity associates the priorities of IEEE 802.1p [IEEE
+    802.1D] priority tagged frames with specific connections.
+    """
+    def __init__(self, entity_id, tp_pointer=None, interwork_tp_pointers=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param tp_pointer: (int) This attribute points to an instance of the
+                                 associated termination point. (0..65535)
+
+        :param interwork_tp_pointers: (list) List of 1 to 8 interworking termination
+                                   point IDs. The first entry is assigned
+                                   got p-bit priority 0. If less than 8 IDs
+                                   are provided, the last ID is used for
+                                   the remaining items.
+        """
+        if tp_pointer is None and interwork_tp_pointers is None:
+            data = dict(
+                    tp_pointer=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_0=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_1=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_2=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_3=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_4=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_5=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_6=OmciNullPointer,
+                    interwork_tp_pointer_for_p_bit_priority_7=OmciNullPointer
+                )
+        else:
+            self.check_type(tp_pointer, (list, type(None)))
+            self.check_type(interwork_tp_pointers, (list, type(None)))
+
+            data = dict()
+
+            if tp_pointer is not None:
+                data['tp_pointer'] = tp_pointer
+
+            if interwork_tp_pointers is not None:
+                assert all(isinstance(tp, int) and 0 <= tp <= 0xFFFF
+                           for tp in interwork_tp_pointers),\
+                    'Interworking TP IDs must be 0..0xFFFF'
+                assert 1 <= len(interwork_tp_pointers) <= 8, \
+                    'Invalid number of Interworking TP IDs. Must be 1..8'
+
+                data = dict()
+                for pbit in range(0, len(interwork_tp_pointers)):
+                    data['interwork_tp_pointer_for_p_bit_priority_{}'.format(pbit)] = \
+                        interwork_tp_pointers[pbit]
+
+                for pbit in range(len(interwork_tp_pointers), 8):
+                    data['interwork_tp_pointer_for_p_bit_priority_{}'.format(pbit)] = \
+                        interwork_tp_pointers[len(interwork_tp_pointers) - 1]
+
+        super(Ieee8021pMapperServiceProfileFrame, self).__init__(Ieee8021pMapperServiceProfile,
+                                                                 entity_id,
+                                                                 data)
+
+
+class MacBridgePortConfigurationDataFrame(MEFrame):
+    """
+    This managed entity represents the ONU as equipment.
+    """
+    def __init__(self, entity_id, bridge_id_pointer=None, port_num=None,
+                 tp_type=None, tp_pointer=None, attributes=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param bridge_id_pointer: (int) This attribute points to an instance of the
+                                        MAC bridge service profile. (0..65535)
+
+        :param port_num: (int) This attribute is the bridge port number. (0..255)
+
+        :param tp_type: (int) This attribute identifies the type of termination point
+                              associated with this MAC bridge port. Valid values are:
+                        1  Physical path termination point Ethernet UNI
+                        2  Interworking VCC termination point
+                        3  IEEE 802.1p mapper service profile
+                        4  IP host config data or IPv6 host config data
+                        5  GEM interworking termination point
+                        6  Multicast GEM interworking termination point
+                        7  Physical path termination point xDSL UNI part 1
+                        8  Physical path termination point VDSL UNI
+                        9  Ethernet flow termination point
+                        10 Reserved
+                        11 Virtual Ethernet interface point
+                        12 Physical path termination point MoCA UNI
+
+        :param tp_pointer: (int) This attribute points to the termination point
+                                 associated with this MAC bridge por. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) additional ME attributes.
+                           not specifically specified as a parameter. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        # Validate
+        self.check_type(bridge_id_pointer, (int, type(None)))
+        self.check_type(port_num, (int, type(None)))
+        self.check_type(tp_type, (int, type(None)))
+        self.check_type(tp_pointer, (int, type(None)))
+
+        if bridge_id_pointer is not None and not 0 <= bridge_id_pointer <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('bridge_id_pointer should be 0..0xFFFE')
+
+        if port_num is not None and not 0 <= port_num <= 255:
+            raise ValueError('port_num should be 0..255')       # TODO: Verify min,max
+
+        if tp_type is not None and not 1 <= tp_type <= 12:
+            raise ValueError('service_profile_pointer should be 1..12')
+
+        if tp_pointer is not None and not 0 <= tp_pointer <= 0xFFFE:  # TODO: Verify max
+            raise ValueError('interworking_tp_pointer should be 0..0xFFFE')
+
+        data = MEFrame._attr_to_data(attributes)
+
+        if bridge_id_pointer is not None or \
+                port_num is not None or \
+                tp_type is not None or \
+                tp_pointer is not None:
+
+            data = data or dict()
+
+            if bridge_id_pointer is not None:
+                data['bridge_id_pointer'] = bridge_id_pointer
+
+            if port_num is not None:
+                data['port_num'] = port_num
+
+            if tp_type is not None:
+                data['tp_type'] = tp_type
+
+            if tp_pointer is not None:
+                data['tp_pointer'] = tp_pointer
+
+        super(MacBridgePortConfigurationDataFrame, self).\
+            __init__(MacBridgePortConfigurationData, entity_id, data)
+
+
+class MacBridgeServiceProfileFrame(MEFrame):
+    """
+    This managed entity models a MAC bridge in its entirety; any number
+    of ports may be associated with the bridge through pointers to the
+    MAC bridge service profile managed entity.
+    """
+    def __init__(self, entity_id, attributes=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(MacBridgeServiceProfileFrame, self).__init__(MacBridgeServiceProfile,
+                                                           entity_id,
+                                                           MEFrame._attr_to_data(attributes))
+
+
+class OntGFrame(MEFrame):
+    """
+    This managed entity represents the ONU as equipment.
+    """
+    def __init__(self, attributes=None):
+        """
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(OntGFrame, self).__init__(OntG, 0,
+                                        MEFrame._attr_to_data(attributes))
+
+
+class Ont2GFrame(MEFrame):
+    """
+    This managed entity contains additional attributes associated with a PON ONU.
+    """
+    def __init__(self, attributes=None):
+        """
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        # Only one managed entity instance (Entity ID=0)
+        super(Ont2GFrame, self).__init__(Ont2G, 0,
+                                         MEFrame._attr_to_data(attributes))
+
+
+class PptpEthernetUniFrame(MEFrame):
+    """
+    This managed entity represents the point at an Ethernet UNI where the physical path
+    terminates and Ethernet physical level functions are performed.
+    """
+    def __init__(self, entity_id, attributes=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(PptpEthernetUniFrame, self).__init__(PptpEthernetUni, entity_id,
+                                                   MEFrame._attr_to_data(attributes))
+
+
+class VeipUniFrame(MEFrame):
+    """
+    This managed entity represents the point a virtual UNI interfaces to a non omci management domain
+    This is typically seen in RG+ONU all-in-one type devices
+    """
+    def __init__(self, entity_id, attributes=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For create/set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(VeipUniFrame, self).__init__(VeipUni, entity_id,
+                                           MEFrame._attr_to_data(attributes))
+
+
+class SoftwareImageFrame(MEFrame):
+    """
+    This managed entity models an executable software image stored in the ONU.
+    """
+    def __init__(self, entity_id):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+        """
+        super(SoftwareImageFrame, self).__init__(SoftwareImage, entity_id, None)
+
+
+class TcontFrame(MEFrame):
+    """
+    An instance of the traffic container managed entity T-CONT represents a
+    logical connection group associated with a G-PON PLOAM layer alloc-ID.
+    """
+    def __init__(self, entity_id, alloc_id=None, policy=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param alloc_id: (int) This attribute links the T-CONT with the alloc-ID
+                               assigned by the OLT in the assign_alloc-ID PLOAM
+                               message (0..0xFFF) or 0xFFFF to mark as free
+
+        :param policy: (int) This attribute indicates the T-CONT's traffic scheduling
+                             policy. Valid values:
+                                0 - Null
+                                1 - Strict priority
+                                2 - WRR - Weighted round robin
+        """
+        # Validate
+        self.check_type(alloc_id, (int, type(None)))
+        self.check_type(policy, (int, type(None)))
+
+        if alloc_id is not None and not (0 <= alloc_id <= 0xFFF or alloc_id == 0xFFFF):
+            raise ValueError('alloc_id should be 0..0xFFF or 0xFFFF to mark it as free')
+
+        if policy is not None and not 0 <= policy <= 2:
+            raise ValueError('policy should be 0..2')
+
+        if alloc_id is None and policy is None:
+            data = None
+        else:
+            data = dict()
+
+            if alloc_id is not None:
+                data['alloc_id'] = alloc_id
+
+            if policy is not None:
+                data['policy'] = policy
+
+        super(TcontFrame, self).__init__(Tcont, entity_id, data)
+
+
+class VlanTaggingFilterDataFrame(MEFrame):
+    """
+    An instance of this managed entity represents a point in the ONU where the
+    interworking of a bearer service (usually Ethernet) to the GEM layer takes
+    place.
+    """
+    def __init__(self, entity_id, vlan_tcis=None, forward_operation=None):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. (0..65535)
+
+        :param vlan_tcis: (list) This attribute is a list of provisioned TCI values
+                                 for the bridge port. (0..0xFFFF)
+
+        :param forward_operation: (int) What to do.  See ITU spec for more information
+
+        """
+        # Validate
+        self.check_type(vlan_tcis, (list, type(None)))
+        self.check_type(forward_operation, (int, type(None)))
+
+        if forward_operation is not None and not 0 <= forward_operation <= 0x21:
+            raise ValueError('forward_operation should be 0..0x21')
+
+        if vlan_tcis is None and forward_operation is None:
+            data = None
+
+        else:
+            data = dict()
+
+            if vlan_tcis is not None:
+                num_tcis = len(vlan_tcis)
+
+                assert 0 <= num_tcis <= 12, 'Number of VLAN TCI values is 0..12'
+                assert all(isinstance(tci, int) and 0 <= tci <= 0xFFFF
+                           for tci in vlan_tcis), "VLAN TCI's are 0..0xFFFF"
+
+                if num_tcis > 0:
+                    vlan_filter_list = [0] * 12
+                    for index in range(0, num_tcis):
+                        vlan_filter_list[index] = vlan_tcis[index]
+
+                    data['vlan_filter_list'] = vlan_filter_list
+                data['number_of_entries'] = num_tcis
+
+            if forward_operation is not None:
+                assert 0 <= forward_operation <= 0x21, \
+                    'forwarding_operation must be 0x00..0x21'
+                data['forward_operation'] = forward_operation
+
+        super(VlanTaggingFilterDataFrame, self).__init__(VlanTaggingFilterData,
+                                                         entity_id,
+                                                         data)
+
+
+class OntDataFrame(MEFrame):
+    """
+    This managed entity models the MIB itself
+    """
+    def __init__(self, mib_data_sync=None, sequence_number=None, ignore_arc=None):
+        """
+        For 'get', 'MIB reset', 'MIB upload', pass no value
+        For 'set' actions, pass mib_data_sync value (0..255)
+        For 'MIB upload next',and 'Get all alarms next' pass sequence_number value (0..65535)
+        For 'Get all alarms", set ignore_arc to True to get all alarms regadrless
+                              of ARC status or False to get all alarms not currently
+                              under ARC
+
+        :param mib_data_sync: (int) This attribute is used to check the alignment
+                                    of the MIB of the ONU with the corresponding MIB
+                                    in the OLT. (0..0xFF)
+        :param sequence_number: (int) This is used for MIB Upload Next (0..0xFFFF)
+        :param ignore_arc: (bool) None for all but 'get_all_alarm' commands
+        """
+        self.check_type(mib_data_sync, (int, type(None)))
+        if mib_data_sync is not None and not 0 <= mib_data_sync <= 0xFF:
+            raise ValueError('mib_data_sync should be 0..0xFF')
+
+        if sequence_number is not None and not 0 <= sequence_number <= 0xFFFF:
+            raise ValueError('sequence_number should be 0..0xFFFF')
+
+        if ignore_arc is not None and not isinstance(ignore_arc, bool):
+            raise TypeError('ignore_arc should be a boolean')
+
+        if mib_data_sync is not None:
+            # Note: Currently the Scapy decode/encode is 16-bits since we need
+            #       the data field that large in order to support MIB and Alarm Upload Next
+            #       commands.  Push our 8-bit MDS value into the upper 8-bits so that
+            #       it is encoded properly into the ONT_Data 'set' frame
+            data = {'mib_data_sync': mib_data_sync << 8}
+
+        elif sequence_number is not None:
+            data = {'mib_data_sync': sequence_number}
+
+        elif ignore_arc is not None:
+            data = {'mib_data_sync': 0 if ignore_arc else 1}
+
+        else:
+            data = {'mib_data_sync'}    # Make Get's happy
+
+        super(OntDataFrame, self).__init__(OntData, 0, data)
+
+
+class OmciFrame(MEFrame):
+    """
+    This managed entity describes the ONU's general level of support for OMCI managed
+    entities and messages. This ME is not included in a MIB upload.
+    """
+    def __init__(self, me_type_table=None, message_type_table=None):
+        """
+        For 'get' request, set the type of table count you wish by
+        setting either me_me_type_table or message_type_table to
+        a boolean 'True' value
+
+        For 'get-next' requests, set the sequence number for the
+        table you wish to retrieve by setting either me_me_type_table or message_type_table to
+        a integer value.
+        """
+        if not isinstance(me_type_table, (bool, int, type(None))):
+            raise TypeError('Parameters must be a boolean or integer')
+
+        if not isinstance(message_type_table, (bool, int, type(None))):
+            raise TypeError('Parameters must be a boolean or integer')
+
+        if me_type_table is not None:
+            if isinstance(me_type_table, bool):
+                data = {'me_type_table'}
+            else:
+                data = {'me_type_table': me_type_table}
+
+        elif message_type_table is not None:
+            if isinstance('message_type_table', bool):
+                data = {'message_type_table'}
+            else:
+                data = {'message_type_table': message_type_table}
+        else:
+            raise NotImplemented('Unknown request')
+
+        super(OmciFrame, self).__init__(Omci, 0, data)
+
+
+class EthernetPMMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects some of the performance monitoring data for a physical
+    Ethernet interface
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                 managed entity is implicitly linked to an instance
+                                 of the physical path termination point Ethernet UNI
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(EthernetPMMonitoringHistoryDataFrame, self).__init__(
+            EthernetPMMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class FecPerformanceMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects performance monitoring data associated with PON
+    downstream FEC counters.
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance of
+                                the ANI-G
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(FecPerformanceMonitoringHistoryDataFrame, self).__init__(
+            FecPerformanceMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class EthernetFrameDownstreamPerformanceMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects performance monitoring data associated with downstream
+    Ethernet frame delivery. It is based on the Etherstats group of [IETF RFC 2819].
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance of
+                                a MAC bridge port configuration data
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(EthernetFrameDownstreamPerformanceMonitoringHistoryDataFrame, self).__init__(
+            EthernetFrameDownstreamPerformanceMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class EthernetFrameUpstreamPerformanceMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects performance monitoring data associated with upstream
+    Ethernet frame delivery. It is based on the Etherstats group of [IETF RFC 2819].
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance of
+                                a MAC bridge port configuration data
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(EthernetFrameUpstreamPerformanceMonitoringHistoryDataFrame, self).__init__(
+            EthernetFrameUpstreamPerformanceMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class GemPortNetworkCtpMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects GEM frame performance monitoring data associated
+    with a GEM port network CTP
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance
+                                of the GEM port network CTP.
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(GemPortNetworkCtpMonitoringHistoryDataFrame, self).__init__(
+            GemPortNetworkCtpMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class XgPonTcPerformanceMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects performance monitoring data associated with
+    the XG-PON transmission convergence layer, as defined in [ITU-T G.987.3]
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance of
+                                the ANI-G.
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(XgPonTcPerformanceMonitoringHistoryDataFrame, self).__init__(
+            XgPonTcPerformanceMonitoringHistoryData, entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class XgPonDownstreamPerformanceMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects performance monitoring data associated with
+    the XG-PON ined in [ITU-T G.987.3]
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) This attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance of
+                                the ANI-G.
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(XgPonDownstreamPerformanceMonitoringHistoryDataFrame, self).__init__(
+            XgPonDownstreamPerformanceMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
+
+
+class XgPonUpstreamPerformanceMonitoringHistoryDataFrame(MEFrame):
+    """
+    This managed entity collects performance monitoring data associated with
+    the XG-PON transmission convergence layer, as defined in [ITU-T G.987.3]
+    """
+    def __init__(self, entity_id, attributes):
+        """
+        :param entity_id: (int) TThis attribute uniquely identifies each instance of
+                                this managed entity. Through an identical ID, this
+                                managed entity is implicitly linked to an instance of
+                                the ANI-G.
+
+        :param attributes: (basestring, list, set, dict) attributes. For gets
+                           a string, list, or set can be provided. For set
+                           operations, a dictionary should be provided, for
+                           deletes None may be specified.
+        """
+        super(XgPonUpstreamPerformanceMonitoringHistoryDataFrame, self).__init__(
+            XgPonUpstreamPerformanceMonitoringHistoryData,
+            entity_id,
+            MEFrame._attr_to_data(attributes))
diff --git a/python/extensions/omci/omci_messages.py b/python/extensions/omci/omci_messages.py
new file mode 100644
index 0000000..f6559a3
--- /dev/null
+++ b/python/extensions/omci/omci_messages.py
@@ -0,0 +1,551 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from scapy.fields import ByteField, ThreeBytesField, StrFixedLenField, ConditionalField, IntField, Field
+from scapy.fields import ShortField, BitField
+from scapy.packet import Packet
+
+from voltha.extensions.omci.omci_defs import AttributeAccess, OmciSectionDataSize
+from voltha.extensions.omci.omci_fields import OmciTableField
+import voltha.extensions.omci.omci_entities as omci_entities
+
+
+log = structlog.get_logger()
+
+
+class OmciData(Field):
+
+    __slots__ = Field.__slots__ + ['_entity_class']
+
+    def __init__(self, name, entity_class="entity_class"):
+        Field.__init__(self, name=name, default=None, fmt='s')
+        self._entity_class = entity_class
+
+    def addfield(self, pkt, s, val):
+        class_id = getattr(pkt, self._entity_class)
+        entity_class = omci_entities.entity_id_to_class_map.get(class_id)
+        for attribute in entity_class.attributes:
+            if AttributeAccess.SetByCreate not in attribute.access:
+                continue
+            if attribute.field.name == 'managed_entity_id':
+                continue
+            fld = attribute.field
+            s = fld.addfield(pkt, s, val.get(fld.name, fld.default))
+        return s
+
+    def getfield(self, pkt, s):
+        """Extract an internal value from a string"""
+        class_id = getattr(pkt, self._entity_class)
+        entity_class = omci_entities.entity_id_to_class_map.get(class_id)
+        data = {}
+        for attribute in entity_class.attributes:
+            if AttributeAccess.SetByCreate not in attribute.access:
+                continue
+            if attribute.field.name == 'managed_entity_id':
+                continue
+            fld = attribute.field
+            s, value = fld.getfield(pkt, s)
+            data[fld.name] = value
+        return s, data
+
+
+class OmciMaskedData(Field):
+
+    __slots__ = Field.__slots__ + ['_entity_class', '_attributes_mask']
+
+    def __init__(self, name, entity_class="entity_class",
+                 attributes_mask="attributes_mask"):
+        Field.__init__(self, name=name, default=None, fmt='s')
+        self._entity_class = entity_class
+        self._attributes_mask = attributes_mask
+
+    def addfield(self, pkt, s, val):
+        class_id = getattr(pkt, self._entity_class)
+        attribute_mask = getattr(pkt, self._attributes_mask)
+        entity_class = omci_entities.entity_id_to_class_map.get(class_id)
+        indices = entity_class.attribute_indices_from_mask(attribute_mask)
+        for index in indices:
+            fld = entity_class.attributes[index].field
+            s = fld.addfield(pkt, s, val[fld.name])
+        return s
+
+    def getfield(self, pkt, s):
+        """Extract an internal value from a string"""
+        class_id = getattr(pkt, self._entity_class)
+        attribute_mask = getattr(pkt, self._attributes_mask)
+        entity_class = omci_entities.entity_id_to_class_map[class_id]
+        indices = entity_class.attribute_indices_from_mask(attribute_mask)
+        data = {}
+        table_attribute_mask = 0
+        for index in indices:
+            try:
+                fld = entity_class.attributes[index].field
+            except IndexError, e:
+                log.error("attribute-decode-failure", attribute_index=index,
+                          entity_class=entity_class, e=e)
+                continue
+            try:
+                s, value = fld.getfield(pkt, s)
+            except Exception, _e:
+                raise
+            if isinstance(pkt, OmciGetResponse) and isinstance(fld, OmciTableField):
+                data[fld.name + '_size'] = value
+                table_attribute_mask = table_attribute_mask | (1 << index)
+            else:
+                data[fld.name] = value
+        if table_attribute_mask:
+            data['table_attribute_mask'] = table_attribute_mask
+        return s, data
+
+
+class OmciMessage(Packet):
+    name = "OmciMessage"
+    message_id = None  # OMCI message_type value, filled by derived classes
+    fields_desc = []
+
+
+class OmciCreate(OmciMessage):
+    name = "OmciCreate"
+    message_id = 0x44
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        OmciData("data")
+    ]
+
+
+class OmciCreateResponse(OmciMessage):
+    name = "OmciCreateResponse"
+    message_id = 0x24
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", None),
+        ByteField("success_code", 0),
+        ShortField("parameter_error_attributes_mask", None),
+    ]
+
+
+class OmciDelete(OmciMessage):
+    name = "OmciDelete"
+    message_id = 0x46
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", None),
+    ]
+
+
+class OmciDeleteResponse(OmciMessage):
+    name = "OmciDeleteResponse"
+    message_id = 0x26
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", None),
+        ByteField("success_code", 0),
+    ]
+
+
+class OmciSet(OmciMessage):
+    name = "OmciSet"
+    message_id = 0x48
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ShortField("attributes_mask", None),
+        OmciMaskedData("data")
+    ]
+
+
+class OmciSetResponse(OmciMessage):
+    name = "OmciSetResponse"
+    message_id = 0x28
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", None),
+        ByteField("success_code", 0),
+        ShortField("unsupported_attributes_mask", None),
+        ShortField("failed_attributes_mask", None),
+    ]
+
+
+class OmciGet(OmciMessage):
+    name = "OmciGet"
+    message_id = 0x49
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ShortField("attributes_mask", None)
+    ]
+
+
+class OmciGetResponse(OmciMessage):
+    name = "OmciGetResponse"
+    message_id = 0x29
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ByteField("success_code", 0),
+        ShortField("attributes_mask", None),
+        ConditionalField(
+            OmciMaskedData("data"), lambda pkt: pkt.success_code == 0)
+    ]
+
+
+class OmciGetAllAlarms(OmciMessage):
+    name = "OmciGetAllAlarms"
+    message_id = 0x4b
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),  # Always 0 (ONT instance)
+        ByteField("alarm_retrieval_mode", 0)  # 0 or 1
+    ]
+
+
+class OmciGetAllAlarmsResponse(OmciMessage):
+    name = "OmciGetAllAlarmsResponse"
+    message_id = 0x2b
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+        ShortField("number_of_commands", None)
+    ]
+
+
+class OmciGetAllAlarmsNext(OmciMessage):
+    name = "OmciGetAllAlarmsNext"
+    message_id = 0x4c
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+        ShortField("command_sequence_number", None)
+    ]
+
+
+class OmciGetAllAlarmsNextResponse(OmciMessage):
+    name = "OmciGetAllAlarmsNextResponse"
+    message_id = 0x2c
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+        ShortField("alarmed_entity_class", None),
+        ShortField("alarmed_entity_id", 0),
+        BitField("alarm_bit_map", None, 224)
+    ]
+
+
+class OmciMibUpload(OmciMessage):
+    name = "OmciMibUpload"
+    message_id = 0x4d
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+    ]
+
+
+class OmciMibUploadResponse(OmciMessage):
+    name = "OmciMibUploadResponse"
+    message_id = 0x2d
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+        ShortField("number_of_commands", None)
+    ]
+
+
+class OmciMibUploadNext(OmciMessage):
+    name = "OmciMibUploadNext"
+    message_id = 0x4e
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+        ShortField("command_sequence_number", None)
+    ]
+
+
+class OmciMibUploadNextResponse(OmciMessage):
+    name = "OmciMibUploadNextResponse"
+    message_id = 0x2e
+    fields_desc = [
+        ShortField("entity_class", 2),  # Always 2 (ONT data)
+        ShortField("entity_id", 0),
+        ShortField("object_entity_class", None),
+        ShortField("object_entity_id", 0),
+        ShortField("object_attributes_mask", None),
+        OmciMaskedData("object_data", entity_class='object_entity_class',
+                       attributes_mask='object_attributes_mask')
+    ]
+
+
+class OmciMibReset(OmciMessage):
+    name = "OmciMibReset"
+    message_id = 0x4f
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0)
+    ]
+
+
+class OmciMibResetResponse(OmciMessage):
+    name = "OmciMibResetResponse"
+    message_id = 0x2f
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ByteField("success_code", 0)
+    ]
+
+
+class OmciAlarmNotification(OmciMessage):
+    name = "AlarmNotification"
+    message_id = 0x10
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        BitField("alarm_bit_map", 0, 224),
+        ThreeBytesField("zero_padding", 0),
+        ByteField("alarm_sequence_number", None)
+    ]
+
+
+class OmciAttributeValueChange(OmciMessage):
+    name = "AttributeValueChange"
+    message_id = 0x11
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ShortField("attributes_mask", None),
+        OmciMaskedData("data")
+    ]
+
+
+class OmciTestResult(OmciMessage):
+    name = "TestResult"
+    message_id = 0x1B
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0)
+        # ME Test specific message contents starts here
+        # TODO: Can this be coded easily with scapy?
+    ]
+
+
+class OmciReboot(OmciMessage):
+    name = "OmciOnuReboot"
+    message_id = 0x59
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ByteField("reboot_code", 0)
+    ]
+
+
+class OmciRebootResponse(OmciMessage):
+    name = "OmciOnuRebootResponse"
+    message_id = 0x39
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ByteField("success_code", 0)
+    ]
+
+
+class OmciGetNext(OmciMessage):
+    name = "OmciGetNext"
+    message_id = 0x5A
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ShortField("attributes_mask", None),
+        ShortField("command_sequence_number", None)
+    ]
+
+
+class OmciGetNextResponse(OmciMessage):
+    name = "OmciGetNextResponse"
+    message_id = 0x3A
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ByteField("success_code", 0),
+        ShortField("attributes_mask", None),
+        ConditionalField(OmciMaskedData("data"),
+                         lambda pkt: pkt.success_code == 0)
+    ]
+
+
+class OmciSynchronizeTime(OmciMessage):
+    name = "OmciSynchronizeTime"
+    message_id = 0x58
+    fields_desc = [
+        ShortField("entity_class", 256),  # OntG
+        ShortField("entity_id", 0),
+        ShortField("year", 0),       # eg) 2018
+        ByteField("month", 0),       # 1..12
+        ByteField("day", 0),         # 1..31
+        ByteField("hour", 0),        # 0..23
+        ByteField("minute", 0),      # 0..59
+        ByteField("second", 0)       # 0..59
+    ]
+
+
+class OmciSynchronizeTimeResponse(OmciMessage):
+    name = "OmciSynchronizeTimeResponse"
+    message_id = 0x38
+    fields_desc = [
+        ShortField("entity_class", 256),  # OntG
+        ShortField("entity_id", 0),
+        ByteField("success_code", 0),
+        ConditionalField(ShortField("success_info", None),
+                         lambda pkt: pkt.success_code == 0)
+    ]
+
+
+class OmciGetCurrentData(OmciMessage):
+    name = "OmciGetCurrentData"
+    message_id = 0x5C
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ShortField("attributes_mask", None),
+    ]
+
+
+class OmciGetCurrentDataResponse(OmciMessage):
+    name = "OmciGetCurrentDataResponse"
+    message_id = 0x3C
+    fields_desc = [
+        ShortField("entity_class", None),
+        ShortField("entity_id", 0),
+        ByteField("success_code", 0),
+        ShortField("attributes_mask", None),
+        ShortField("unsupported_attributes_mask", None),
+        ShortField("failed_attributes_mask", None),
+        ConditionalField(
+            OmciMaskedData("data"), lambda pkt: pkt.success_code == 0)
+    ]
+
+class OmciStartSoftwareDownload(OmciMessage):
+    name = "OmciStartSoftwareDownload"
+    message_id = 0x53
+    fields_desc = [
+        ShortField("entity_class", 7),  # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("window_size", 0),
+        IntField("image_size", 0),
+        ByteField("image_number", 1),   # Always only 1 in parallel
+        ShortField("instance_id", None) # should be same as "entity_id"        
+    ]
+
+class OmciStartSoftwareDownloadResponse(OmciMessage):
+    name = "OmciStartSoftwareDownloadResponse"
+    message_id = 0x33
+    fields_desc = [
+        ShortField("entity_class", 7),  # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("result", 0),
+        ByteField("window_size", 0),
+        ByteField("image_number", 1),   # Always only 1 in parallel
+        ShortField("instance_id", None) # should be same as "entity_id"        
+    ]
+
+class OmciEndSoftwareDownload(OmciMessage):
+    name = "OmciEndSoftwareDownload"
+    message_id = 0x55
+    fields_desc = [
+        ShortField("entity_class", 7),  # Always 7 (Software image)
+        ShortField("entity_id", None),
+        IntField("crc32", 0),
+        IntField("image_size", 0),
+        ByteField("image_number", 1),   # Always only 1 in parallel
+        ShortField("instance_id", None),# should be same as "entity_id"
+    ]
+
+class OmciEndSoftwareDownloadResponse(OmciMessage):
+    name = "OmciEndSoftwareDownload"
+    message_id = 0x35
+    fields_desc = [
+        ShortField("entity_class", 7),  # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("result", 0),
+        ByteField("image_number", 1),   # Always only 1 in parallel
+        ShortField("instance_id", None),# should be same as "entity_id"
+        ByteField("result0", 0)         # same as result 
+    ]
+
+class OmciDownloadSection(OmciMessage):
+    name = "OmciDownloadSection"
+    message_id = 0x14
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("section_number", 0),  # Always only 1 in parallel
+        StrFixedLenField("data", 0, length=OmciSectionDataSize) # section data
+    ]
+
+class OmciDownloadSectionLast(OmciMessage):
+    name = "OmciDownloadSection"
+    message_id = 0x54
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("section_number", 0),  # Always only 1 in parallel
+        StrFixedLenField("data", 0, length=OmciSectionDataSize) # section data
+    ]
+
+class OmciDownloadSectionResponse(OmciMessage):
+    name = "OmciDownloadSectionResponse"
+    message_id = 0x34
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("result", 0),
+        ByteField("section_number", 0),  # Always only 1 in parallel
+    ]
+
+class OmciActivateImage(OmciMessage):
+    name = "OmciActivateImage"
+    message_id = 0x56
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("activate_flag", 0)    # Activate image unconditionally
+    ]
+
+class OmciActivateImageResponse(OmciMessage):
+    name = "OmciActivateImageResponse"
+    message_id = 0x36
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("result", 0)           # Activate image unconditionally
+    ]
+
+class OmciCommitImage(OmciMessage):
+    name = "OmciCommitImage"
+    message_id = 0x57
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+    ]
+
+class OmciCommitImageResponse(OmciMessage):
+    name = "OmciCommitImageResponse"
+    message_id = 0x37
+    fields_desc = [
+        ShortField("entity_class", 7),   # Always 7 (Software image)
+        ShortField("entity_id", None),
+        ByteField("result", 0)           # Activate image unconditionally
+    ]
+    
diff --git a/python/extensions/omci/onu_configuration.py b/python/extensions/omci/onu_configuration.py
new file mode 100644
index 0000000..2bd82ce
--- /dev/null
+++ b/python/extensions/omci/onu_configuration.py
@@ -0,0 +1,509 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+
+from voltha.protos.device_pb2 import Image
+from omci_entities import *
+from database.mib_db_api import *
+from enum import IntEnum
+
+
+class OMCCVersion(IntEnum):
+    Unknown                 = 0     # Unknown or unsupported version
+    G_984_4                 = 0x80  # (06/04)
+    G_984_4_2005_Amd_1      = 0x81  # Amd.1 (06/05)
+    G_984_4_2006_Amd_2      = 0x82  # Amd.2 (03/06)
+    G_984_4_2006_Amd_3      = 0x83  # Amd.3 (12/06)
+    G_984_4_2008            = 0x84  # (02/08)
+    G_984_4_2009_Amd_1      = 0x85  # Amd.1 (06/09)
+    G_984_4_2009_Amd_2_Base = 0x86  # Amd.2 (2009)  Baseline message set only, w/o the extended message set option
+    G_984_4_2009_Amd_2      = 0x96  # Amd.2 (2009)  Extended message set option +  baseline message set.
+    G_988_2010_Base         = 0xA0  # (2010) Baseline message set only, w/o the extended message set option
+    G_988_2011_Amd_1_Base   = 0xA1  # Amd.1 (2011) Baseline message set only
+    G_988_2012_Amd_2_Base   = 0xA2  # Amd.2 (2012) Baseline message set only
+    G_988_2012_Base         = 0xA3  # (2012) Baseline message set only
+    G_988_2010              = 0xB0  # (2010) Baseline and extended message set
+    G_988_2011_Amd_1        = 0xB1  # Amd.1 (2011) Baseline and extended message set
+    G_988_2012_Amd_2        = 0xB2  # Amd.2 (2012) Baseline and extended message set
+    G_988_2012              = 0xB3  # (2012)Baseline and extended message set
+
+    @staticmethod
+    def values():
+        return {OMCCVersion[member].value for member in OMCCVersion.__members__.keys()}
+
+    @staticmethod
+    def to_enum(value):
+        return next((v for k, v in OMCCVersion.__members__.items()
+                     if v.value == value), OMCCVersion.Unknown)
+
+
+class OnuConfiguration(object):
+    """
+    Utility class to query OMCI MIB Database for various ONU/OMCI Configuration
+    and capabilties. These capabilities revolve around read-only MEs discovered
+    during the MIB Upload process.
+
+    There is also a 'omci_onu_capabilities' State Machine and an
+    'onu_capabilities_task.py' OMCI Task that will query the ONU, via the
+    OMCI (ME#287) Managed entity to get the full list of supported OMCI ME's
+    and available actions/message-types supported.
+
+    NOTE: Currently this class is optimized/tested for ONUs that support the
+          OpenOMCI implementation.
+    """
+    def __init__(self, omci_agent, device_id):
+        """
+        Initialize this instance of the OnuConfiguration class
+
+        :param omci_agent: (OpenOMCIAgent) agent reference
+        :param device_id: (str) ONU Device ID
+
+        :raises KeyError: If ONU Device is not registered with OpenOMCI
+        """
+        self.log = structlog.get_logger(device_id=device_id)
+        self._device_id = device_id
+        self._onu_device = omci_agent.get_device(device_id)
+
+        # The capabilities
+        self._attributes = None
+        self.reset()
+
+    def _get_capability(self, attr, class_id, instance_id=None):
+        """
+        Get the OMCI capabilities for this device
+
+        :param attr: (str) OnuConfiguration attribute field
+        :param class_id: (int) ME Class ID
+        :param instance_id: (int) Instance ID. If not provided, all instances of the
+                            specified class ID are returned if present in the DB.
+
+        :return: (dict) Class and/or Instances. None is returned if the CLASS is not present
+        """
+        try:
+            assert self._onu_device.mib_synchronizer.last_mib_db_sync is not None, \
+                'MIB Database for ONU {} has never been synchronized'.format(self._device_id)
+
+            # Get the requested information
+            if self._attributes[attr] is None:
+                value = self._onu_device.query_mib(class_id, instance_id=instance_id)
+
+                if isinstance(value, dict) and len(value) > 0:
+                    self._attributes[attr] = value
+
+            return self._attributes[attr]
+
+        except Exception as e:
+            self.log.exception('onu-capabilities', e=e, class_id=class_id,
+                               instance_id=instance_id)
+            raise
+
+    def reset(self):
+        """
+        Reset the cached database entries to None.  This method should be
+        called after any communications loss to the ONU (reboot, PON down, ...)
+        in case a new software load with different capabilities is available.
+        """
+        self._attributes = {
+            '_ont_g': None,
+            '_ont_2g': None,
+            '_ani_g': None,
+            '_uni_g': None,
+            '_cardholder': None,
+            '_circuit_pack': None,
+            '_software': None,
+            '_pptp': None,
+            '_veip': None
+        }
+
+    @property
+    def version(self):
+        """
+        This attribute identifies the version of the ONU as defined by the vendor
+        """
+        ontg = self._get_capability('_ont_g', OntG.class_id, 0)
+        if ontg is None or ATTRIBUTES_KEY not in ontg:
+            return None
+
+        return ontg[ATTRIBUTES_KEY].get('version')
+
+    @property
+    def serial_number(self):
+        """
+        The serial number is unique for each ONU
+        """
+        ontg = self._get_capability('_ont_g', OntG.class_id, 0)
+        if ontg is None or ATTRIBUTES_KEY not in ontg:
+            return None
+
+        return ontg[ATTRIBUTES_KEY].get('serial_number')
+
+    @property
+    def traffic_management_option(self):
+        """
+        This attribute identifies the upstream traffic management function
+        implemented in the ONU. There are three options:
+
+            0 Priority controlled and flexibly scheduled upstream traffic. The traffic
+              scheduler and priority queue mechanism are used for upstream traffic.
+
+            1 Rate controlled upstream traffic. The maximum upstream traffic of each
+              individual connection is guaranteed by shaping.
+
+            2 Priority and rate controlled. The traffic scheduler and priority queue
+              mechanism are used for upstream traffic. The maximum upstream traffic
+              of each individual connection is guaranteed by shaping.
+        """
+        ontg = self._get_capability('_ont_g', OntG.class_id, 0)
+        if ontg is None or ATTRIBUTES_KEY not in ontg:
+            return None
+
+        return ontg[ATTRIBUTES_KEY].get('traffic_management_options')
+
+    @property
+    def onu_survival_time(self):
+        """
+        This attribute indicates the minimum guaranteed time in milliseconds
+        between the loss of external power and the silence of the ONU. This does not
+        include survival time attributable to a backup battery. The value zero implies that
+        the actual time is not known.
+
+        Optional
+        """
+        ontg = self._get_capability('_ont_g', OntG.class_id, 0)
+        if ontg is None or ATTRIBUTES_KEY not in ontg:
+            return None
+
+        return ontg[ATTRIBUTES_KEY].get('ont_survival_time', 0)
+
+    @property
+    def equipment_id(self):
+        """
+        This attribute may be used to identify the specific type of ONU. In some
+        environments, this attribute may include the equipment CLEI code.
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('equipment_id')
+
+    @property
+    def omcc_version(self):
+        """
+        This attribute identifies the version of the OMCC protocol being used by the
+        ONU. This allows the OLT to manage a network with ONUs that support different
+        OMCC versions. Release levels of [ITU-T G.984.4] are supported with code
+        points of the form 0x8y and 0x9y, where y is a hexadecimal digit in the range
+        0..F.  Support for continuing revisions of this Recommendation is defined in
+        the 0xAy range.
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return OMCCVersion.to_enum(ont2g[ATTRIBUTES_KEY].get('omcc_version', 0))
+
+    @property
+    def vendor_product_code(self):
+        """
+        This attribute contains a vendor-specific product code for the ONU
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('vendor_product_code')
+
+    @property
+    def total_priority_queues(self):
+        """
+        This attribute reports the total number of upstream priority queues
+        that are not associated with a circuit pack, but with the ONU in its entirety
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('total_priority_queue_number')
+
+    @property
+    def total_traffic_schedulers(self):
+        """
+        This attribute reports the total number of traffic schedulers that
+        are not associated with a circuit pack, but with the ONU in its entirety.
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('total_traffic_scheduler_number')
+
+    @property
+    def total_gem_ports(self):
+        """
+        This attribute reports the total number of GEM port-IDs supported
+        by the ONU.
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('total_gem_port_id_number')
+
+    @property
+    def uptime(self):
+        """
+        This attribute counts 10 ms intervals since the ONU was last initialized.
+        It rolls over to 0 when full
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('sys_uptime')
+
+    @property
+    def connectivity_capability(self):
+        """
+        This attribute indicates the Ethernet connectivity models that the ONU
+        can support. The value 0 indicates that the capability is not supported; 1 signifies
+        support.
+
+             Bit    Model [Figure reference ITU-T 988]
+              1     (LSB) N:1 bridging, Figure 8.2.2-3
+              2     1:M mapping, Figure 8.2.2-4
+              3     1:P filtering, Figure 8.2.2-5
+              4     N:M bridge-mapping, Figure 8.2.2-6
+              5     1:MP map-filtering, Figure 8.2.2-7
+              6     N:P bridge-filtering, Figure 8.2.2-8
+              7  to refer to    N:MP bridge-map-filtering, Figure 8.2.2-9
+            8...16  Reserved
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('connectivity_capability')
+
+    @property
+    def qos_configuration_flexibility(self):
+        """
+        This attribute reports whether various managed entities in the
+        ONU are fixed by the ONU's architecture or whether they are configurable. For
+        backward compatibility, and if the ONU does not support this attribute, all such
+        attributes are understood to be hard-wired.
+
+            Bit      Interpretation when bit value = 1
+             1 (LSB) Priority queue ME: Port field of related port attribute is
+                     read-write and can point to any T-CONT or UNI port in the
+                     same slot
+             2       Priority queue ME: The traffic scheduler pointer is permitted
+                     to refer to any other traffic scheduler in the same slot
+             3       Traffic scheduler ME: T-CONT pointer is read-write
+             4       Traffic scheduler ME: Policy attribute is read-write
+             5       T-CONT ME: Policy attribute is read-write
+             6       Priority queue ME: Priority field of related port attribute is
+                     read-write
+             7..16   Reserved
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('qos_configuration_flexibility')
+
+    @property
+    def priority_queue_scale_factor(self):
+        """
+        This specifies the scale factor of several attributes of the priority
+        queue managed entity of section 5.2.8
+        """
+        ont2g = self._get_capability('_ont_2g', Ont2G.class_id, 0)
+        if ont2g is None or ATTRIBUTES_KEY not in ont2g:
+            return None
+
+        return ont2g[ATTRIBUTES_KEY].get('priority_queue_scale_factor', 1)
+
+    @property
+    def cardholder_entities(self):
+        """
+        Return a dictionary containing some overall information on the CardHolder
+        instances for this ONU.
+        """
+        ch = self._get_capability('_cardholder', Cardholder.class_id)
+        results = dict()
+
+        if ch is not None:
+            for inst, inst_data in ch.items():
+                if isinstance(inst, int):
+                    results[inst] = {
+                        'entity-id':              inst,
+                        'is-single-piece':        inst >= 256,
+                        'slot-number':            inst & 0xff,
+                        'actual-plug-in-type':    inst_data[ATTRIBUTES_KEY].get('actual_plugin_unit_type', 0),
+                        'actual-equipment-id':    inst_data[ATTRIBUTES_KEY].get('actual_equipment_id', 0),
+                        'protection-profile-ptr': inst_data[ATTRIBUTES_KEY].get('protection_profile_pointer', 0),
+                    }
+        return results if len(results) else None
+
+    @property
+    def circuitpack_entities(self):
+        """
+        This specifies the scale factor of several attributes of the priority
+        queue managed entity of section 5.2.8
+        """
+        cp = self._get_capability('_circuit_pack', CircuitPack.class_id)
+        results = dict()
+
+        if cp is not None:
+            for inst, inst_data in cp.items():
+                if isinstance(inst, int):
+                    results[inst] = {
+                        'entity-id': inst,
+                        'number-of-ports': inst_data[ATTRIBUTES_KEY].get('number_of_ports', 0),
+                        'serial-number': inst_data[ATTRIBUTES_KEY].get('serial_number', 0),
+                        'version': inst_data[ATTRIBUTES_KEY].get('version', 0),
+                        'vendor-id': inst_data[ATTRIBUTES_KEY].get('vendor_id', 0),
+                        'total-tcont-count': inst_data[ATTRIBUTES_KEY].get('total_tcont_buffer_number', 0),
+                        'total-priority-queue-count': inst_data[ATTRIBUTES_KEY].get('total_priority_queue_number', 0),
+                        'total-traffic-sched-count': inst_data[ATTRIBUTES_KEY].get('total_traffic_scheduler_number', 0),
+                    }
+
+        return results if len(results) else None
+
+    @property
+    def software_images(self):
+        """
+        Get a list of software image information for the ONU.  The information is provided
+        so that it may be directly added to the protobuf Device information software list.
+        """
+        sw = self._get_capability('_software', SoftwareImage.class_id)
+        images = list()
+
+        if sw is not None:
+            for inst, inst_data in sw.items():
+                if isinstance(inst, int):
+                    is_active = inst_data[ATTRIBUTES_KEY].get('is_active', False)
+
+                    images.append(Image(name='running-revision' if is_active else 'candidate-revision',
+                                        version=str(inst_data[ATTRIBUTES_KEY].get('version',
+                                                                                  'Not Available').rstrip('\0')),
+                                        is_active=is_active,
+                                        is_committed=inst_data[ATTRIBUTES_KEY].get('is_committed',
+                                                                                   False),
+                                        is_valid=inst_data[ATTRIBUTES_KEY].get('is_valid',
+                                                                               False),
+                                        install_datetime='Not Available',
+                                        hash=str(inst_data[ATTRIBUTES_KEY].get('image_hash',
+                                                                               'Not Available').rstrip('\0'))))
+        return images if len(images) else None
+
+    @property
+    def ani_g_entities(self):
+        """
+        This managed entity organizes data associated with each access network
+        interface supported by a G-PON ONU. The ONU automatically creates one
+        instance of this managed entity for each PON physical port.
+        """
+        ag = self._get_capability('_ani_g', AniG.class_id)
+        results = dict()
+
+        if ag is not None:
+            for inst, inst_data in ag.items():
+                if isinstance(inst, int):
+                    results[inst] = {
+                        'entity-id':               inst,
+                        'slot-number':             (inst >> 8) & 0xff,
+                        'port-number':             inst & 0xff,
+                        'total-tcont-count':       inst_data[ATTRIBUTES_KEY].get('total_tcont_number', 0),
+                        'piggyback-dba-reporting': inst_data[ATTRIBUTES_KEY].get('piggyback_dba_reporting', 0),
+                    }
+        return results if len(results) else None
+
+    @property
+    def uni_g_entities(self):
+        """
+        This managed entity organizes data associated with user network interfaces
+        (UNIs) supported by GEM. One instance of the UNI-G managed entity exists
+        for each UNI supported by the ONU.
+
+        The ONU automatically creates or deletes instances of this managed entity
+        upon the creation or deletion of a real or virtual circuit pack managed
+        entity, one per port.
+        """
+        ug = self._get_capability('_uni_g', UniG.class_id)
+        results = dict()
+
+        if ug is not None:
+            for inst, inst_data in ug.items():
+                if isinstance(inst, int):
+                    results[inst] = {
+                        'entity-id':               inst,
+                        'management-capability':   inst_data[ATTRIBUTES_KEY].get('management_capability', 0)
+                    }
+        return results if len(results) else None
+
+    @property
+    def pptp_entities(self):
+        """
+        Returns discovered PPTP Ethernet entities.  TODO more detail here
+        """
+        pptp = self._get_capability('_pptp', PptpEthernetUni.class_id)
+        results = dict()
+
+        if pptp is not None:
+            for inst, inst_data in pptp.items():
+                if isinstance(inst, int):
+                    results[inst] = {
+                        'entity-id':                inst,
+                        'expected-type':            inst_data[ATTRIBUTES_KEY].get('expected_type', 0),
+                        'sensed-type':              inst_data[ATTRIBUTES_KEY].get('sensed_type', 0),
+                        'autodetection-config':     inst_data[ATTRIBUTES_KEY].get('autodetection_config', 0),
+                        'ethernet-loopback-config': inst_data[ATTRIBUTES_KEY].get('ethernet_loopback_config', 0),
+                        'administrative-state':     inst_data[ATTRIBUTES_KEY].get('administrative_state', 0),
+                        'operational-state':        inst_data[ATTRIBUTES_KEY].get('operational_state', 0),
+                        'config-ind':               inst_data[ATTRIBUTES_KEY].get('config_ind', 0),
+                        'max-frame-size':           inst_data[ATTRIBUTES_KEY].get('max_frame_size', 0),
+                        'dte-dce-ind':              inst_data[ATTRIBUTES_KEY].get('dte_dce_ind', 0),
+                        'pause-time':               inst_data[ATTRIBUTES_KEY].get('pause_time', 0),
+                        'bridged-ip-ind':           inst_data[ATTRIBUTES_KEY].get('bridged_ip_ind', 0),
+                        'arc':                      inst_data[ATTRIBUTES_KEY].get('arc', 0),
+                        'arc-interval':             inst_data[ATTRIBUTES_KEY].get('arc_interval', 0),
+                        'pppoe-filter':             inst_data[ATTRIBUTES_KEY].get('ppoe_filter', 0),
+                        'power-control':            inst_data[ATTRIBUTES_KEY].get('power_control', 0)
+                    }
+        return results if len(results) else None
+
+    @property
+    def veip_entities(self):
+        """
+        Returns discovered VEIP entities.  TODO more detail here
+        """
+        veip = self._get_capability('_veip', VeipUni.class_id)
+        results = dict()
+
+        if veip is not None:
+            for inst, inst_data in veip.items():
+                if isinstance(inst, int):
+                    results[inst] = {
+                        'entity-id':                inst,
+                        'administrative-state':     inst_data[ATTRIBUTES_KEY].get('administrative_state', 0),
+                        'operational-state':        inst_data[ATTRIBUTES_KEY].get('operational_state', 0),
+                        'interdomain-name':         inst_data[ATTRIBUTES_KEY].get('interdomain_name', ""),
+                        'tcp-udp-pointer':          inst_data[ATTRIBUTES_KEY].get('tcp_udp_pointer', 0),
+                        'iana-assigned-port':       inst_data[ATTRIBUTES_KEY].get('iana_assigned_port', 0)
+                    }
+        return results if len(results) else None
diff --git a/python/extensions/omci/onu_device_entry.py b/python/extensions/omci/onu_device_entry.py
new file mode 100644
index 0000000..7a0c439
--- /dev/null
+++ b/python/extensions/omci/onu_device_entry.py
@@ -0,0 +1,635 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import structlog
+from copy import deepcopy
+from voltha.protos.device_pb2 import ImageDownload
+from voltha.extensions.omci.omci_defs import EntityOperations, ReasonCodes
+import voltha.extensions.omci.omci_entities as omci_entities
+from voltha.extensions.omci.omci_cc import OMCI_CC
+from common.event_bus import EventBusClient
+from voltha.extensions.omci.tasks.task_runner import TaskRunner
+from voltha.extensions.omci.onu_configuration import OnuConfiguration
+from voltha.extensions.omci.tasks.reboot_task import OmciRebootRequest, RebootFlags
+from voltha.extensions.omci.tasks.omci_modify_request import OmciModifyRequest
+from voltha.extensions.omci.omci_me import OntGFrame
+from voltha.extensions.omci.state_machines.image_agent import ImageAgent
+
+from twisted.internet import reactor, defer
+from enum import IntEnum
+
+OP = EntityOperations
+RC = ReasonCodes
+
+ACTIVE_KEY = 'active'
+IN_SYNC_KEY = 'in-sync'
+LAST_IN_SYNC_KEY = 'last-in-sync-time'
+SUPPORTED_MESSAGE_ENTITY_KEY = 'managed-entities'
+SUPPORTED_MESSAGE_TYPES_KEY = 'message-type'
+
+
+class OnuDeviceEvents(IntEnum):
+    # Events of interest to Device Adapters and OpenOMCI State Machines
+    DeviceStatusEvent = 0       # OnuDeviceEntry running status changed
+    MibDatabaseSyncEvent = 1    # MIB database sync changed
+    OmciCapabilitiesEvent = 2   # OMCI ME and message type capabilities
+    AlarmDatabaseSyncEvent = 3  # Alarm database sync changed
+
+    # TODO: Add other events here as needed
+
+
+class OnuDeviceEntry(object):
+    """
+    An ONU Device entry in the MIB
+    """
+    def __init__(self, omci_agent, device_id, adapter_agent, custom_me_map,
+                 mib_db, alarm_db, support_classes, clock=None):
+        """
+        Class initializer
+
+        :param omci_agent: (OpenOMCIAgent) Reference to OpenOMCI Agent
+        :param device_id: (str) ONU Device ID
+        :param adapter_agent: (AdapterAgent) Adapter agent for ONU
+        :param custom_me_map: (dict) Additional/updated ME to add to class map
+        :param mib_db: (MibDbApi) MIB Database reference
+        :param alarm_db: (MibDbApi) Alarm Table/Database reference
+        :param support_classes: (dict) State machines and tasks for this ONU
+        """
+        self.log = structlog.get_logger(device_id=device_id)
+
+        self._started = False
+        self._omci_agent = omci_agent         # OMCI AdapterAgent
+        self._device_id = device_id           # ONU Device ID
+        self._adapter_agent = adapter_agent
+        self._runner = TaskRunner(device_id, clock=clock)  # OMCI_CC Task runner
+        self._deferred = None
+        # self._img_download_deferred = None    # deferred of image file download from server
+        self._omci_upgrade_deferred = None    # deferred of ONU OMCI upgrading procedure
+        self._omci_activate_deferred = None   # deferred of ONU OMCI Softwre Image Activate
+        self._img_deferred = None             # deferred returned to caller of do_onu_software_download
+        self._first_in_sync = False
+        self._first_capabilities = False
+        self._timestamp = None
+        # self._image_download = None  # (voltha_pb2.ImageDownload)
+        self.reactor = clock if clock is not None else reactor
+        
+        # OMCI related databases are on a per-agent basis. State machines and tasks
+        # are per ONU Vendor
+        #
+        self._support_classes = support_classes
+        self._configuration = None
+
+        try:
+            # MIB Synchronization state machine
+            self._mib_db_in_sync = False
+            mib_synchronizer_info = support_classes.get('mib-synchronizer')
+            advertise = mib_synchronizer_info['advertise-events']
+            self._mib_sync_sm = mib_synchronizer_info['state-machine'](self._omci_agent,
+                                                                       device_id,
+                                                                       mib_synchronizer_info['tasks'],
+                                                                       mib_db,
+                                                                       advertise_events=advertise)
+            # ONU OMCI Capabilities state machine
+            capabilities_info = support_classes.get('omci-capabilities')
+            advertise = capabilities_info['advertise-events']
+            self._capabilities_sm = capabilities_info['state-machine'](self._omci_agent,
+                                                                       device_id,
+                                                                       capabilities_info['tasks'],
+                                                                       advertise_events=advertise)
+            # ONU Performance Monitoring Intervals state machine
+            interval_info = support_classes.get('performance-intervals')
+            advertise = interval_info['advertise-events']
+            self._pm_intervals_sm = interval_info['state-machine'](self._omci_agent, device_id,
+                                                                   interval_info['tasks'],
+                                                                   advertise_events=advertise)
+
+            # ONU ALARM Synchronization state machine
+            self._alarm_db_in_sync = False
+            alarm_synchronizer_info = support_classes.get('alarm-synchronizer')
+            advertise = alarm_synchronizer_info['advertise-events']
+            self._alarm_sync_sm = alarm_synchronizer_info['state-machine'](self._omci_agent,
+                                                                           device_id,
+                                                                           alarm_synchronizer_info['tasks'],
+                                                                           alarm_db,
+                                                                           advertise_events=advertise)
+            # State machine of downloading image file from server
+            downloader_info = support_classes.get('image_downloader')
+            image_upgrader_info = support_classes.get('image_upgrader')
+            # image_activate_info = support_classes.get('image_activator')
+            advertise = downloader_info['advertise-event']
+            # self._img_download_sm = downloader_info['state-machine'](self._omci_agent, device_id, 
+            #                                                       downloader_info['tasks'],
+            #                                                       advertise_events=advertise)
+            self._image_agent = ImageAgent(self._omci_agent, device_id, 
+                                           downloader_info['state-machine'], downloader_info['tasks'], 
+                                           image_upgrader_info['state-machine'], image_upgrader_info['tasks'],
+                                           # image_activate_info['state-machine'],
+                                           advertise_events=advertise, clock=clock)
+
+            # self._omci_upgrade_sm = image_upgrader_info['state-machine'](device_id, advertise_events=advertise)
+            
+        except Exception as e:
+            self.log.exception('state-machine-create-failed', e=e)
+            raise
+
+        # Put state machines in the order you wish to start them
+
+        self._state_machines = []
+        self._on_start_state_machines = [       # Run when 'start()' called
+            self._mib_sync_sm,
+            self._capabilities_sm,
+        ]
+        self._on_sync_state_machines = [        # Run after first in_sync event
+            self._alarm_sync_sm,
+        ]
+        self._on_capabilities_state_machines = [  # Run after first capabilities events
+            self._pm_intervals_sm
+        ]
+        self._custom_me_map = custom_me_map
+        self._me_map = omci_entities.entity_id_to_class_map.copy()
+
+        if custom_me_map is not None:
+            self._me_map.update(custom_me_map)
+
+        self.event_bus = EventBusClient()
+
+        # Create OMCI communications channel
+        self._omci_cc = OMCI_CC(adapter_agent, self.device_id, self._me_map, clock=clock)
+
+    @staticmethod
+    def event_bus_topic(device_id, event):
+        """
+        Get the topic name for a given event for this ONU Device
+        :param device_id: (str) ONU Device ID
+        :param event: (OnuDeviceEvents) Type of event
+        :return: (str) Topic string
+        """
+        assert event in OnuDeviceEvents, \
+            'Event {} is not an ONU Device Event'.format(event.name)
+        return 'omci-device:{}:{}'.format(device_id, event.name)
+
+    @property
+    def device_id(self):
+        return self._device_id
+
+    @property
+    def omci_cc(self):
+        return self._omci_cc
+
+    @property
+    def adapter_agent(self):
+        return self._adapter_agent
+        
+    @property
+    def task_runner(self):
+        return self._runner
+
+    @property
+    def mib_synchronizer(self):
+        """
+        Reference to the OpenOMCI MIB Synchronization state machine for this ONU
+        """
+        return self._mib_sync_sm
+
+    @property
+    def omci_capabilities(self):
+        """
+        Reference to the OpenOMCI OMCI Capabilities state machine for this ONU
+        """
+        return self._capabilities_sm
+
+    @property
+    def pm_intervals_state_machine(self):
+        """
+        Reference to the OpenOMCI PM Intervals state machine for this ONU
+        """
+        return self._pm_intervals_sm
+
+    def set_pm_config(self, pm_config):
+        """
+        Set PM interval configuration
+
+        :param pm_config: (OnuPmIntervalMetrics) PM Interval configuration
+        """
+        self._pm_intervals_sm.set_pm_config(pm_config)
+
+    @property
+    def timestamp(self):
+        """Pollable Metrics last collected timestamp"""
+        return self._timestamp
+
+    @timestamp.setter
+    def timestamp(self, value):
+        self._timestamp = value
+
+    @property
+    def alarm_synchronizer(self):
+        """
+        Reference to the OpenOMCI Alarm Synchronization state machine for this ONU
+        """
+        return self._alarm_sync_sm
+
+    @property
+    def active(self):
+        """
+        Is the ONU device currently active/running
+        """
+        return self._started
+
+    @property
+    def custom_me_map(self):
+        """ Vendor-specific Managed Entity Map for this vendor's device"""
+        return self._custom_me_map
+
+    @property
+    def me_map(self):
+        """ Combined ME and Vendor-specific Managed Entity Map for this device"""
+        return self._me_map
+
+    def _cancel_deferred(self):
+        d, self._deferred = self._deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    @property
+    def mib_db_in_sync(self):
+        return self._mib_db_in_sync
+
+    @mib_db_in_sync.setter
+    def mib_db_in_sync(self, value):
+        if self._mib_db_in_sync != value:
+            # Save value
+            self._mib_db_in_sync = value
+
+            # Start up other state machines if needed
+            if self._first_in_sync:
+                self.first_in_sync_event()
+
+            # Notify any event listeners
+            topic = OnuDeviceEntry.event_bus_topic(self.device_id,
+                                                   OnuDeviceEvents.MibDatabaseSyncEvent)
+            msg = {
+                IN_SYNC_KEY: self._mib_db_in_sync,
+                LAST_IN_SYNC_KEY: self.mib_synchronizer.last_mib_db_sync
+            }
+            self.event_bus.publish(topic=topic, msg=msg)
+
+    @property
+    def alarm_db_in_sync(self):
+        return self._alarm_db_in_sync
+
+    @alarm_db_in_sync.setter
+    def alarm_db_in_sync(self, value):
+        if self._alarm_db_in_sync != value:
+            # Save value
+            self._alarm_db_in_sync = value
+
+            # Start up other state machines if needed
+            if self._first_in_sync:
+                self.first_in_sync_event()
+
+            # Notify any event listeners
+            topic = OnuDeviceEntry.event_bus_topic(self.device_id,
+                                                   OnuDeviceEvents.AlarmDatabaseSyncEvent)
+            msg = {
+                IN_SYNC_KEY: self._alarm_db_in_sync
+            }
+            self.event_bus.publish(topic=topic, msg=msg)
+
+    @property
+    def configuration(self):
+        """
+        Get the OMCI Configuration object for this ONU.  This is a class that provides some
+        common database access functions for ONU capabilities and read-only configuration values.
+
+        :return: (OnuConfiguration)
+        """
+        return self._configuration
+
+    @property
+    def image_agent(self):
+        return self._image_agent
+
+    # @property
+    # def image_download(self):
+    #     return self._image_download
+        
+    def start(self):
+        """
+        Start the ONU Device Entry state machines
+        """
+        self.log.debug('OnuDeviceEntry.start', previous=self._started)
+        if self._started:
+            return
+
+        self._started = True
+        self._omci_cc.enabled = True
+        self._first_in_sync = True
+        self._first_capabilities = True
+        self._runner.start()
+        self._configuration = OnuConfiguration(self._omci_agent, self._device_id)
+
+        # Start MIB Sync and other state machines that can run before the first
+        # MIB Synchronization event occurs. Start 'later' so that any
+        # ONU Device, OMCI DB, OMCI Agent, and others are fully started before
+        # performing the start.
+
+        self._state_machines = []
+
+        def start_state_machines(machines):
+            for sm in machines:
+                self._state_machines.append(sm)
+                sm.start()
+
+        self._deferred = reactor.callLater(0, start_state_machines,
+                                           self._on_start_state_machines)
+        # Notify any event listeners
+        self._publish_device_status_event()
+
+    def stop(self):
+        """
+        Stop the ONU Device Entry state machines
+        """
+        if not self._started:
+            return
+
+        self._started = False
+        self._cancel_deferred()
+        self._omci_cc.enabled = False
+
+        # Halt MIB Sync and other state machines
+        for sm in self._state_machines:
+            sm.stop()
+
+        self._state_machines = []
+
+        # Stop task runner
+        self._runner.stop()
+
+        # Notify any event listeners
+        self._publish_device_status_event()
+
+    def first_in_sync_event(self):
+        """
+        This event is called on the first MIB synchronization event after
+        OpenOMCI has been started. It is responsible for starting any
+        other state machine and to initiate an ONU Capabilities report
+        """
+        if self._first_in_sync:
+            self._first_in_sync = False
+
+            # Start up the ONU Capabilities task
+            self._configuration.reset()
+
+            # Insure that the ONU-G Administrative lock is disabled
+            def failure(reason):
+                self.log.error('disable-admin-state-lock', reason=reason)
+
+            frame = OntGFrame(attributes={'administrative_state': 0}).set()
+            task = OmciModifyRequest(self._omci_agent, self.device_id, frame)
+            self.task_runner.queue_task(task).addErrback(failure)
+
+            # Start up any other remaining OpenOMCI state machines
+            def start_state_machines(machines):
+                for sm in machines:
+                    self._state_machines.append(sm)
+                    reactor.callLater(0, sm.start)
+
+            self._deferred = reactor.callLater(0, start_state_machines,
+                                               self._on_sync_state_machines)
+
+            # if an ongoing upgrading is not accomplished, restart it
+            if self._img_deferred is not None:
+               self._image_agent.onu_bootup() 
+
+    def first_in_capabilities_event(self):
+        """
+        This event is called on the first capabilities event after
+        OpenOMCI has been started. It is responsible for starting any
+        other state machine. These are often state machines that have tasks
+        that are dependent upon knowing if various MEs are supported
+        """
+        if self._first_capabilities:
+            self._first_capabilities = False
+
+            # Start up any other remaining OpenOMCI state machines
+            def start_state_machines(machines):
+                for sm in machines:
+                    self._state_machines.append(sm)
+                    reactor.callLater(0, sm.start)
+
+            self._deferred = reactor.callLater(0, start_state_machines,
+                                               self._on_capabilities_state_machines)
+
+    # def __on_omci_download_success(self, image_download):
+    #     self.log.debug("__on_omci_download_success", image=image_download)
+    #     self._omci_upgrade_deferred = None
+    #     # self._ret_deferred = None
+    #     self._omci_activate_deferred = self._image_agent.activate_onu_image(image_download.name)
+    #     self._omci_activate_deferred.addCallbacks(self.__on_omci_image_activate_success, 
+    #                                               self.__on_omci_image_activate_fail, errbackArgs=(image_name,))
+    #     return image_name
+        
+    # def __on_omci_download_fail(self, fail, image_name):
+    #     self.log.debug("__on_omci_download_fail", failure=fail, image_name=image_name)
+    #     self.reactor.callLater(0, self._img_deferred.errback, fail)
+    #     self._omci_upgrade_deferred = None
+    #     self._img_deferred = None
+
+    def __on_omci_image_activate_success(self, image_name):
+        self.log.debug("__on_omci_image_activate_success", image_name=image_name)
+        self._omci_activate_deferred = None
+        self._img_deferred.callback(image_name)
+        self._img_deferred = None
+        return image_name
+
+    def __on_omci_image_activate_fail(self, fail, image_name):
+        self.log.debug("__on_omci_image_activate_fail", faile=fail, image_name=image_name)
+        self._omci_activate_deferred = None
+        self._img_deferred.errback(fail)
+        self._img_deferred = None
+    
+    def _publish_device_status_event(self):
+        """
+        Publish the ONU Device start/start status.
+        """
+        topic = OnuDeviceEntry.event_bus_topic(self.device_id,
+                                               OnuDeviceEvents.DeviceStatusEvent)
+        msg = {ACTIVE_KEY: self._started}
+        self.event_bus.publish(topic=topic, msg=msg)
+
+    def publish_omci_capabilities_event(self):
+        """
+        Publish the ONU Device start/start status.
+        """
+        if self.first_in_capabilities_event:
+            self.first_in_capabilities_event()
+
+        topic = OnuDeviceEntry.event_bus_topic(self.device_id,
+                                               OnuDeviceEvents.OmciCapabilitiesEvent)
+        msg = {
+            SUPPORTED_MESSAGE_ENTITY_KEY: self.omci_capabilities.supported_managed_entities,
+            SUPPORTED_MESSAGE_TYPES_KEY: self.omci_capabilities.supported_message_types
+        }
+        self.event_bus.publish(topic=topic, msg=msg)
+
+    def delete(self):
+        """
+        Stop the ONU Device's state machine and remove the ONU, and any related
+        OMCI state information from the OpenOMCI Framework
+        """
+        self.stop()
+        self.mib_synchronizer.delete()
+
+        # OpenOMCI cleanup
+        if self._omci_agent is not None:
+            self._omci_agent.remove_device(self._device_id, cleanup=True)
+
+    def query_mib(self, class_id=None, instance_id=None, attributes=None):
+        """
+        Get MIB database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attributes: (list or str) Managed Entity instance's attributes
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('query', class_id=class_id, instance_id=instance_id,
+                       attributes=attributes)
+
+        return self.mib_synchronizer.query_mib(class_id=class_id, instance_id=instance_id,
+                                               attributes=attributes)
+
+    def query_mib_single_attribute(self, class_id, instance_id, attribute):
+        """
+        Get MIB database information for a single specific attribute
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attribute: (str) Managed Entity instance's attribute
+
+        :return: (varies) The value requested. If class/inst/attribute is
+                          not found, None is returned
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('query-single', class_id=class_id,
+                       instance_id=instance_id, attributes=attribute)
+        assert isinstance(attribute, basestring), \
+            'Only a single attribute value can be retrieved'
+
+        entry = self.mib_synchronizer.query_mib(class_id=class_id,
+                                                instance_id=instance_id,
+                                                attributes=attribute)
+
+        return entry[attribute] if attribute in entry else None
+
+    def query_alarm_table(self, class_id=None, instance_id=None):
+        """
+        Get Alarm information
+
+        This method can be used to request information from the alarm database to
+        the detailed level requested
+
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self.log.debug('query', class_id=class_id, instance_id=instance_id)
+
+        return self.alarm_synchronizer.query_mib(class_id=class_id, instance_id=instance_id)
+
+    def reboot(self,
+               flags=RebootFlags.Reboot_Unconditionally,
+               timeout=OmciRebootRequest.DEFAULT_REBOOT_TIMEOUT):
+        """
+        Request a reboot of the ONU
+
+        :param flags: (RebootFlags) Reboot condition
+        :param timeout: (int) Reboot task priority
+        :return: (deferred) Fires upon completion or error
+        """
+        assert self.active, 'This device is not active'
+
+        return self.task_runner.queue_task(OmciRebootRequest(self._omci_agent,
+                                                             self.device_id,
+                                                             flags=flags,
+                                                             timeout=timeout))
+
+    # def get_imagefile(self, local_name, local_dir, remote_url=None):
+    #     """
+    #     Return a Deferred that will be triggered if the file is locally available
+    #     or downloaded successfully
+    #     """
+    #     self.log.info('start download from {}'.format(remote_url))
+
+    #     # for debug purpose, start runner here to queue downloading task
+    #     # self._runner.start()
+
+    #     return self._image_agent.get_image(self._image_download)
+
+    def do_onu_software_download(self, image_dnld):
+        """
+        image_dnld: (ImageDownload)
+        : Return a Deferred that will be triggered when upgrading results in success or failure
+        """
+        self.log.debug('do_onu_software_download')
+        image_download = deepcopy(image_dnld)
+        # self._img_download_deferred = self._image_agent.get_image(self._image_download)
+        # self._img_download_deferred.addCallbacks(self.__on_download_success, self.__on_download_fail, errbackArgs=(self._image_download,))
+        # self._ret_deferred = defer.Deferred()
+        # return self._ret_deferred
+        return self._image_agent.get_image(image_download)
+
+    # def do_onu_software_switch(self):
+    def do_onu_image_activate(self, image_dnld_name):
+        """
+        Return a Deferred that will be triggered when switching software image results in success or failure
+        """
+        if self._img_deferred is None:
+            self.log.debug('do_onu_image_activate')
+            self._img_deferred = defer.Deferred()
+            self._omci_upgrade_deferred = self._image_agent.onu_omci_download(image_dnld_name)
+            self._omci_upgrade_deferred.addCallbacks(self.__on_omci_image_activate_success, 
+	                                                 self.__on_omci_image_activate_fail, errbackArgs=(image_dnld_name,))
+        return self._img_deferred
+
+    def cancel_onu_software_download(self, image_name):
+        self.log.debug('cancel_onu_software_download')
+        self._image_agent.cancel_download_image(image_name)
+        self._image_agent.cancel_upgrade_onu()
+        if self._img_deferred and not self._img_deferred.called:
+            self._img_deferred.cancel()
+        self._img_deferred = None
+        # self._image_download = None
+
+    def get_image_download_status(self, image_name):
+        return self._image_agent.get_image_status(image_name)
+        
diff --git a/python/extensions/omci/openomci_agent.py b/python/extensions/omci/openomci_agent.py
new file mode 100644
index 0000000..b47fbab
--- /dev/null
+++ b/python/extensions/omci/openomci_agent.py
@@ -0,0 +1,283 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from twisted.internet import reactor
+from voltha.extensions.omci.database.mib_db_dict import MibDbVolatileDict
+from voltha.extensions.omci.database.mib_db_ext import MibDbExternal
+from voltha.extensions.omci.state_machines.mib_sync import MibSynchronizer
+from voltha.extensions.omci.tasks.mib_upload import MibUploadTask
+from voltha.extensions.omci.tasks.get_mds_task import GetMdsTask
+from voltha.extensions.omci.tasks.mib_resync_task import MibResyncTask
+from voltha.extensions.omci.tasks.mib_reconcile_task import MibReconcileTask
+from voltha.extensions.omci.tasks.sync_time_task import SyncTimeTask
+from voltha.extensions.omci.state_machines.alarm_sync import AlarmSynchronizer
+from voltha.extensions.omci.tasks.alarm_resync_task import AlarmResyncTask
+from voltha.extensions.omci.database.alarm_db_ext import AlarmDbExternal
+from voltha.extensions.omci.tasks.interval_data_task import IntervalDataTask
+from voltha.extensions.omci.onu_device_entry import OnuDeviceEntry
+from voltha.extensions.omci.state_machines.omci_onu_capabilities import OnuOmciCapabilities
+from voltha.extensions.omci.tasks.onu_capabilities_task import OnuCapabilitiesTask
+from voltha.extensions.omci.state_machines.performance_intervals import PerformanceIntervals
+from voltha.extensions.omci.tasks.omci_create_pm_task import OmciCreatePMRequest
+from voltha.extensions.omci.tasks.omci_delete_pm_task import OmciDeletePMRequest
+from voltha.extensions.omci.state_machines.image_agent import ImageDownloadeSTM, OmciSoftwareImageDownloadSTM
+from voltha.extensions.omci.tasks.file_download_task import FileDownloadTask
+from voltha.extensions.omci.tasks.omci_sw_image_upgrade_task import OmciSwImageUpgradeTask
+
+OpenOmciAgentDefaults = {
+    'mib-synchronizer': {
+        'state-machine': MibSynchronizer,  # Implements the MIB synchronization state machine
+        'database': MibDbVolatileDict,     # Implements volatile ME MIB database
+        # 'database': MibDbExternal,         # Implements persistent ME MIB database
+        'advertise-events': True,          # Advertise events on OpenOMCI event bus
+        'tasks': {
+            'mib-upload': MibUploadTask,
+            'get-mds': GetMdsTask,
+            'mib-audit': GetMdsTask,
+            'mib-resync': MibResyncTask,
+            'mib-reconcile': MibReconcileTask
+        }
+    },
+    'omci-capabilities': {
+        'state-machine': OnuOmciCapabilities,   # Implements OMCI capabilities state machine
+        'advertise-events': False,              # Advertise events on OpenOMCI event bus
+        'tasks': {
+            'get-capabilities': OnuCapabilitiesTask  # Get supported ME and Commands
+        }
+    },
+    'performance-intervals': {
+        'state-machine': PerformanceIntervals,  # Implements PM Intervals State machine
+        'advertise-events': False,              # Advertise events on OpenOMCI event bus
+        'tasks': {
+            'sync-time': SyncTimeTask,
+            'collect-data': IntervalDataTask,
+            'create-pm': OmciCreatePMRequest,
+            'delete-pm': OmciDeletePMRequest,
+        },
+    },
+    'alarm-synchronizer': {
+        'state-machine': AlarmSynchronizer,    # Implements the Alarm sync state machine
+        'database': AlarmDbExternal,           # For any State storage needs
+        'advertise-events': True,              # Advertise events on OpenOMCI event bus
+        'tasks': {
+            'alarm-resync': AlarmResyncTask
+        }
+     },
+    'image_downloader': {
+        'state-machine': ImageDownloadeSTM,
+        'advertise-event': True,
+        'tasks': {
+            'download-file': FileDownloadTask
+        }
+    },
+    'image_upgrader': {
+        'state-machine': OmciSoftwareImageDownloadSTM,
+        'advertise-event': True,
+        'tasks': {
+            'omci_upgrade_task': OmciSwImageUpgradeTask
+        }
+    }
+    # 'image_activator': {
+    #     'state-machine': OmciSoftwareImageActivateSTM,
+    #     'advertise-event': True,
+    # }
+}
+
+
+class OpenOMCIAgent(object):
+    """
+    OpenOMCI for VOLTHA
+
+    This will become the primary interface into OpenOMCI for ONU Device Adapters
+    in VOLTHA v1.3 sprint 3 time frame.
+    """
+    def __init__(self, core, support_classes=OpenOmciAgentDefaults, clock=None):
+        """
+        Class initializer
+
+        :param core: (VolthaCore) VOLTHA Core
+        :param support_classes: (Dict) Classes to support OMCI
+        """
+        self.log = structlog.get_logger()
+        self._core = core
+        self.reactor = clock if clock is not None else reactor
+        self._started = False
+        self._devices = dict()       # device-id -> DeviceEntry
+        self._event_bus = None
+
+        # OMCI related databases are on a per-agent basis. State machines and tasks
+        # are per ONU Vendore
+        #
+        # MIB Synchronization Database
+        self._mib_db = None
+        self._mib_database_cls = support_classes['mib-synchronizer']['database']
+
+        # Alarm Synchronization Database
+        self._alarm_db = None
+        self._alarm_database_cls = support_classes['alarm-synchronizer']['database']
+
+    @property
+    def core(self):
+        """ Return a reference to the VOLTHA Core component"""
+        return self._core
+
+    @property
+    def database_class(self):
+        return self._mib_database_cls
+
+    # TODO: Need to deprecate this. ImageAgent is using it and should not
+    @property
+    def database(self):
+        return self._mib_db
+        
+    def start(self):
+        """
+        Start OpenOMCI
+        """
+        if self._started:
+            return
+
+        self.log.debug('OpenOMCIAgent.start')
+        self._started = True
+
+        try:
+            # Create all databases as needed. This should be done before
+            # State machines are started for the first time
+
+            if self._mib_db is None:
+                self._mib_db = self._mib_database_cls(self)
+
+            if self._alarm_db is None:
+                self._alarm_db = self._alarm_database_cls(self)
+
+            # Start/restore databases
+
+            self._mib_db.start()
+            self._alarm_db.start()
+
+            for device in self._devices.itervalues():
+                device.start()
+
+        except Exception as e:
+            self.log.exception('startup', e=e)
+
+    def stop(self):
+        """
+        Shutdown OpenOMCI
+        """
+        if not self._started:
+            return
+
+        self.log.debug('stop')
+        self._started = False
+        self._event_bus = None
+
+        # ONUs OMCI shutdown
+        for device in self._devices.itervalues():
+            device.stop()
+
+        # DB shutdown
+        self._mib_db.stop()
+        self._alarm_db.stop()
+
+    def mk_event_bus(self):
+        """ Get the event bus for OpenOMCI"""
+        if self._event_bus is None:
+            from voltha.extensions.omci.openomci_event_bus import OpenOmciEventBus
+            self._event_bus = OpenOmciEventBus()
+
+        return self._event_bus
+
+    def advertise(self, event_type, data):
+        """
+        Advertise an OpenOMCU event on the kafka bus
+        :param event_type: (int) Event Type (enumberation from OpenOMCI protobuf definitions)
+        :param data: (Message, dict, ...) Associated data (will be convert to a string)
+        """
+        if self._started:
+            try:
+                self.mk_event_bus().advertise(event_type, data)
+
+            except Exception as e:
+                self.log.exception('advertise-failure', e=e)
+
+    def add_device(self, device_id, adapter_agent, custom_me_map=None,
+                   support_classes=OpenOmciAgentDefaults):
+        """
+        Add a new ONU to be managed.
+
+        To provide vendor-specific or custom Managed Entities, create your own Entity
+        ID to class mapping dictionary.
+
+        Since ONU devices can be added at any time (even during Device Handler
+        startup), the ONU device handler is responsible for calling start()/stop()
+        for this object.
+
+        :param device_id: (str) Device ID of ONU to add
+        :param adapter_agent: (AdapterAgent) Adapter agent for ONU
+        :param custom_me_map: (dict) Additional/updated ME to add to class map
+        :param support_classes: (dict) State machines and tasks for this ONU
+
+        :return: (OnuDeviceEntry) The ONU device
+        """
+        self.log.debug('OpenOMCIAgent.add-device', device_id=device_id)
+
+        device = self._devices.get(device_id)
+
+        if device is None:
+            device = OnuDeviceEntry(self, device_id, adapter_agent, custom_me_map,
+                                    self._mib_db, self._alarm_db, support_classes, clock=self.reactor)
+
+            self._devices[device_id] = device
+
+        return device
+
+    def remove_device(self, device_id, cleanup=False):
+        """
+        Remove a managed ONU
+
+        :param device_id: (str) Device ID of ONU to remove
+        :param cleanup: (bool) If true, scrub any state related information
+        """
+        self.log.debug('remove-device', device_id=device_id, cleanup=cleanup)
+
+        device = self._devices.get(device_id)
+
+        if device is not None:
+            device.stop()
+
+            if cleanup:
+                del self._devices[device_id]
+
+    def device_ids(self):
+        """
+        Get an immutable set of device IDs managed by this OpenOMCI instance
+
+        :return: (frozenset) Set of device IDs (str)
+        """
+        return frozenset(self._devices.keys())
+
+    def get_device(self, device_id):
+        """
+        Get ONU device entry.  For external (non-OpenOMCI users) the ONU Device
+        returned should be used for read-only activity.
+
+        :param device_id: (str) ONU Device ID
+
+        :return: (OnuDeviceEntry) ONU Device entry
+        :raises KeyError: If device does not exist
+        """
+        return self._devices[device_id]
diff --git a/python/extensions/omci/openomci_event_bus.py b/python/extensions/omci/openomci_event_bus.py
new file mode 100644
index 0000000..5c67865
--- /dev/null
+++ b/python/extensions/omci/openomci_event_bus.py
@@ -0,0 +1,54 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from google.protobuf.json_format import MessageToDict
+from google.protobuf.message import Message
+from simplejson import dumps
+from common.event_bus import EventBusClient
+from voltha.protos.omci_mib_db_pb2 import OpenOmciEvent
+from voltha.protos.omci_alarm_db_pb2 import AlarmOpenOmciEvent
+from common.utils.json_format import MessageToDict
+
+
+class OpenOmciEventBus(object):
+    """ Event bus for publishing OpenOMCI related events. """
+    __slots__ = (
+        '_event_bus_client',  # The event bus client used to publish events.
+        '_topic'              # the topic to publish to
+    )
+
+    def __init__(self):
+        self._event_bus_client = EventBusClient()
+        self._topic = 'openomci-events'
+
+    def message_to_dict(m):
+        return MessageToDict(m, True, True, False)
+
+    def advertise(self, event_type, data):
+        if isinstance(data, Message):
+            msg = dumps(MessageToDict(data, True, True))
+        elif isinstance(data, dict):
+            msg = dumps(data)
+        else:
+            msg = str(data)
+
+        event_func = AlarmOpenOmciEvent if 'AlarmSynchronizer' in msg \
+                                  else OpenOmciEvent
+        event = event_func(
+                type=event_type,
+                data=msg
+        )
+
+        self._event_bus_client.publish(self._topic, event)
diff --git a/python/extensions/omci/state_machines/__init__.py b/python/extensions/omci/state_machines/__init__.py
new file mode 100644
index 0000000..b0fb0b2
--- /dev/null
+++ b/python/extensions/omci/state_machines/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/python/extensions/omci/state_machines/alarm_sync.py b/python/extensions/omci/state_machines/alarm_sync.py
new file mode 100644
index 0000000..c7b7d64
--- /dev/null
+++ b/python/extensions/omci/state_machines/alarm_sync.py
@@ -0,0 +1,670 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from datetime import datetime
+from transitions import Machine
+from twisted.internet import reactor
+from voltha.extensions.omci.omci_defs import ReasonCodes, EntityOperations
+from voltha.extensions.omci.omci_cc import OmciCCRxEvents, OMCI_CC, RX_RESPONSE_KEY
+from voltha.extensions.omci.omci_messages import OmciGetAllAlarmsResponse
+from voltha.extensions.omci.omci_frame import OmciFrame
+from voltha.extensions.omci.database.alarm_db_ext import AlarmDbExternal
+from voltha.extensions.omci.database.mib_db_api import ATTRIBUTES_KEY
+from voltha.extensions.omci.omci_entities import CircuitPack, PptpEthernetUni, OntG, AniG
+
+from common.event_bus import EventBusClient
+from voltha.protos.omci_alarm_db_pb2 import AlarmOpenOmciEventType
+
+RxEvent = OmciCCRxEvents
+RC = ReasonCodes
+OP = EntityOperations
+
+
+class AlarmSynchronizer(object):
+    """
+    OpenOMCI Alarm Synchronizer state machine
+    """
+    DEFAULT_STATES = ['disabled', 'starting', 'auditing', 'in_sync']
+
+    DEFAULT_TRANSITIONS = [
+        {'trigger': 'start', 'source': 'disabled', 'dest': 'starting'},
+
+        {'trigger': 'audit_alarm', 'source': 'starting', 'dest': 'auditing'},
+        {'trigger': 'sync_alarm', 'source': 'starting', 'dest': 'in_sync'},
+
+        {'trigger': 'success', 'source': 'auditing', 'dest': 'in_sync'},
+        {'trigger': 'audit_alarm', 'source': 'auditing', 'dest': 'auditing'},
+        {'trigger': 'failure', 'source': 'auditing', 'dest': 'auditing'},
+
+        {'trigger': 'audit_alarm', 'source': 'in_sync', 'dest': 'auditing'},
+
+        # Do wildcard 'stop' trigger last so it covers all previous states
+        {'trigger': 'stop', 'source': '*', 'dest': 'disabled'},
+    ]
+    DEFAULT_TIMEOUT_RETRY = 15     # Seconds to delay after task failure/timeout
+    DEFAULT_AUDIT_DELAY = 180      # Periodic tick to audit the ONU's alarm table
+
+    def __init__(self, agent, device_id, alarm_sync_tasks, db,
+                 advertise_events=False,
+                 states=DEFAULT_STATES,
+                 transitions=DEFAULT_TRANSITIONS,
+                 initial_state='disabled',
+                 timeout_delay=DEFAULT_TIMEOUT_RETRY,
+                 audit_delay=DEFAULT_AUDIT_DELAY):
+        """
+        Class initialization
+
+        :param agent: (OpenOmciAgent) Agent
+        :param device_id: (str) ONU Device ID
+        :param db: (MibDbApi) MIB/Alarm Database
+        :param advertise_events: (bool) Advertise events on OpenOMCI Event Bus
+        :param alarm_sync_tasks: (dict) Tasks to run
+        :param states: (list) List of valid states
+        :param transitions: (dict) Dictionary of triggers and state changes
+        :param initial_state: (str) Initial state machine state
+        :param timeout_delay: (int/float) Number of seconds after a timeout to attempt
+                                          a retry (goes back to starting state)
+        :param audit_delay: (int) Seconds between Alarm audits while in sync. Set to
+                                  zero to disable audit. An operator can request
+                                  an audit manually by calling 'self.audit_alarm'
+        """
+
+        self.log = structlog.get_logger(device_id=device_id)
+
+        self._agent = agent
+        self._device_id = device_id
+        self._device = None
+        self._database = db
+        self._timeout_delay = timeout_delay
+        self._audit_delay = audit_delay
+        self._resync_task = alarm_sync_tasks['alarm-resync']
+        self._advertise_events = advertise_events
+        self._alarm_manager = None
+        self._onu_id = None
+        self._uni_ports = list()
+        self._ani_ports = list()
+
+        self._deferred = None
+        self._current_task = None
+        self._task_deferred = None
+        self._last_alarm_sequence_value = 0
+        self._device_in_db = False
+
+        self._event_bus = EventBusClient()
+        self._omci_cc_subscriptions = {               # RxEvent.enum -> Subscription Object
+            RxEvent.Get_ALARM_Get: None,
+            RxEvent.Alarm_Notification: None
+        }
+        self._omci_cc_sub_mapping = {
+            RxEvent.Get_ALARM_Get: self.on_alarm_update_response,
+            RxEvent.Alarm_Notification: self.on_alarm_notification
+        }
+
+        # Statistics and attributes
+        # TODO: add any others if it will support problem diagnosis
+
+        # Set up state machine to manage states
+        self.machine = Machine(model=self, states=states,
+                               transitions=transitions,
+                               initial=initial_state,
+                               queued=True,
+                               name='{}-{}'.format(self.__class__.__name__,
+                                                   device_id))
+
+    def _cancel_deferred(self):
+        d1, self._deferred = self._deferred, None
+        d2, self._task_deferred = self._task_deferred, None
+
+        for d in [d1, d1]:
+            try:
+                if d is not None and not d.called:
+                    d.cancel()
+            except:
+                pass
+
+    def __str__(self):
+        return 'Alarm Synchronizer: Device ID: {}, State:{}'.format(self._device_id, self.state)
+
+    def delete(self):
+        """
+        Cleanup any state information
+        """
+        self.stop()
+        db, self._database = self._database, None
+
+        if db is not None:
+            db.remove(self._device_id)
+
+    @property
+    def device_id(self):
+        return self._device_id
+
+    @property
+    def last_alarm_sequence(self):
+        return self._last_alarm_sequence_value
+
+    def reset_alarm_sequence(self):
+        if self._last_alarm_sequence_value != 0:
+            self._last_alarm_sequence_value = 0
+
+    def increment_alarm_sequence(self):
+        self._last_alarm_sequence_value += 1
+        if self._last_alarm_sequence_value > 255:
+            self._last_alarm_sequence_value = 1
+
+    @property
+    def advertise_events(self):
+        return self._advertise_events
+
+    @advertise_events.setter
+    def advertise_events(self, value):
+        if not isinstance(value, bool):
+            raise TypeError('Advertise event is a boolean')
+        self._advertise_events = value
+
+    def advertise(self, event, info):
+        """Advertise an event on the OpenOMCI event bus"""
+        if self._advertise_events:
+            self._agent.advertise(event,
+                                  {
+                                      'state-machine': self.machine.name,
+                                      'info': info,
+                                      'time': str(datetime.utcnow())
+                                  })
+
+    def set_alarm_params(self, mgr=None, onu_id=None, uni_ports=None, ani_ports=None):
+        if mgr is not None:
+            self._alarm_manager = mgr
+
+        if onu_id is not None:
+            self._onu_id = onu_id
+
+        if uni_ports is not None:
+            assert isinstance(uni_ports, list)
+            self._uni_ports = uni_ports
+
+        if ani_ports is not None:
+            assert isinstance(ani_ports, list)
+            self._ani_ports = ani_ports
+
+    def on_enter_disabled(self):
+        """
+        State machine is being stopped
+        """
+        self.advertise(AlarmOpenOmciEventType.state_change, self.state)
+
+        self._cancel_deferred()
+
+        task, self._current_task = self._current_task, None
+        if task is not None:
+            task.stop()
+
+        # Drop Response and Autonomous notification subscriptions
+        for event, sub in self._omci_cc_subscriptions.iteritems():
+            if sub is not None:
+                self._omci_cc_subscriptions[event] = None
+                self._device.omci_cc.event_bus.unsubscribe(sub)
+
+    def _seed_database(self):
+        if not self._device_in_db:
+            try:
+                try:
+                    self._database.start()
+                    self._database.add(self._device_id)
+                    self.log.debug('seed-db-does-not-exist', device_id=self._device_id)
+
+                except KeyError:
+                    # Device already is in database
+                    self.log.debug('seed-db-exist', device_id=self._device_id)
+
+                self._device_in_db = True
+
+            except Exception as e:
+                self.log.exception('seed-database-failure', e=e)
+
+    def on_enter_starting(self):
+        """
+        Determine ONU status and start Alarm Synchronization tasks
+        """
+        self._device = self._agent.get_device(self._device_id)
+        self.advertise(AlarmOpenOmciEventType.state_change, self.state)
+
+        # Make sure root of external Alarm Database exists
+        self._seed_database()
+
+        # Set up Response and Autonomous notification subscriptions
+        try:
+            for event, sub in self._omci_cc_sub_mapping.iteritems():
+                if self._omci_cc_subscriptions[event] is None:
+                    self._omci_cc_subscriptions[event] = \
+                        self._device.omci_cc.event_bus.subscribe(
+                            topic=OMCI_CC.event_bus_topic(self._device_id, event),
+                            callback=sub)
+
+        except Exception as e:
+            self.log.exception('omci-cc-subscription-setup', e=e)
+
+        # Schedule first audit if enabled
+        if self._audit_delay > 0:
+            # Note using the shorter timeout delay here since this is the first
+            # audit after startup
+            self._deferred = reactor.callLater(self._timeout_delay, self.audit_alarm)
+        else:
+            self._deferred = reactor.callLater(0, self.sync_alarm)
+
+    def on_enter_in_sync(self):
+        """
+        Schedule a tick to occur to in the future to request an audit
+        """
+        self.advertise(AlarmOpenOmciEventType.state_change, self.state)
+
+        if self._audit_delay > 0:
+            # Note using the shorter timeout delay here since this is the first
+            # audit after startup
+            self._deferred = reactor.callLater(self._audit_delay, self.audit_alarm)
+
+    def on_enter_auditing(self):
+        """
+         Begin full Alarm data sync, Comparing the all alarms
+         """
+        self.advertise(AlarmOpenOmciEventType.state_change, self.state)
+
+        def success(results):
+            self.log.debug('alarm-diff-success')
+            self._current_task = None
+
+            # Any differences found between ONU and OpenOMCI Alarm tables?
+            if results is None:
+                self._device.alarm_db_in_sync = True
+                self._deferred = reactor.callLater(0, self.success)
+            else:
+                # Reconcile the alarm table and re-run audit
+                self.reconcile_alarm_table(results)
+                self._deferred = reactor.callLater(5, self.audit_alarm)
+
+        def failure(reason):
+            self.log.info('alarm-update-failure', reason=reason)
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.failure)
+
+        self._current_task = self._resync_task(self._agent, self._device_id)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def reconcile_alarm_table(self, results):
+        self.log.debug('alarm-reconcile', state=self.state, results=results)
+
+        onu_only = results['onu-only']
+        olt_only = results['olt-only']
+        attr_diffs = results['attr-diffs']
+        onu_db = results['onu-db']
+        olt_db = results['olt-db']
+
+        if any(item is not None for item in (onu_only, olt_only, attr_diffs)):
+            self._device.alarm_db_in_sync = False
+
+        # Compare the differences.  During upload, if there are no alarms at all,
+        # then the ONU alarm table retrieved may be empty (instead of MEs with all
+        # bits cleared) depending upon the ONU's OMCI Stack.
+
+        if onu_only is not None:
+            self.process_onu_only_diffs(onu_only, onu_db)
+
+        if olt_only is not None:
+            self.process_olt_only_diffs(olt_only)
+
+        if attr_diffs is not None:
+            self.process_attr_diffs(attr_diffs, olt_db, onu_db)
+
+    def process_onu_only_diffs(self, onu_only, onu_db):
+        """
+        ONU only alarms will typically occur when doing the first audit as our
+        database is clear and we are seeding the alarm table. Save the entries
+        and if any are set, we need to raise that alarm.
+
+        :param onu_only: (list) Tuples with [0]=class ID, [1]=entity ID
+        :param onu_db: (dict) ONU Alarm database from the alarm audit upload
+        """
+        for cid_eid in onu_only:
+            class_id = cid_eid[0]
+            entity_id = cid_eid[1]
+            try:
+                bitmap = onu_db[class_id][entity_id][ATTRIBUTES_KEY][AlarmDbExternal.ALARM_BITMAP_KEY]
+                self.process_alarm_data(class_id, entity_id, bitmap, -1)
+
+            except KeyError as e:
+                self.log.error('alarm-not-found', class_id=class_id, entity_id=entity_id, e=e)
+
+    def process_olt_only_diffs(self, olt_only):
+        """
+        OLT only alarms may occur if the alarm(s) are no longer active on the ONU
+        and the notification was missed. Process this by sending a cleared bitmap
+        for any alarm in the OLT database only
+
+        :param olt_only: (list) Tuples with [0]=class ID, [1]=entity ID
+        """
+        for cid_eid in olt_only:
+            # First process the alarm clearing
+            self.process_alarm_data(cid_eid[0], cid_eid[1], 0, -1)
+            # Now remove from alarm DB so we match the ONU alarm table
+            self._database.delete(self._device_id, cid_eid[0], cid_eid[1])
+
+    def process_attr_diffs(self, attr_diffs, onu_db):
+        """
+        Mismatch in alarm settings. Note that the attribute should always be the
+        alarm bitmap attribute (long).  For differences, the ONU is always right
+
+        :param attr_diffs: (list(int,int,str)) [0]=class ID, [1]=entity ID, [1]=attr
+        :param olt_db: (dict) OLT Alarm database snapshot from the alarm audit
+        :param onu_db: (dict) ONU Alarm database from the alarm audit upload
+        """
+        for cid_eid_attr in attr_diffs:
+            class_id = cid_eid_attr[0]
+            entity_id = cid_eid_attr[1]
+
+            try:
+                assert AlarmDbExternal.ALARM_BITMAP_KEY == cid_eid_attr[2]
+                bitmap = onu_db[class_id][entity_id][ATTRIBUTES_KEY][AlarmDbExternal.ALARM_BITMAP_KEY]
+                self.process_alarm_data(class_id, entity_id, bitmap, -1)
+
+            except KeyError as e:
+                self.log.error('alarm-not-found', class_id=class_id, entity_id=entity_id, e=e)
+
+    def on_alarm_update_response(self, _topic, msg):
+        """
+        Process a Get All Alarms response
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-alarm-update-response', state=self.state, msg=msg)
+
+        if self._omci_cc_subscriptions[RxEvent.Get_ALARM_Get]:
+            if self.state == 'disabled':
+                self.log.error('rx-in-invalid-state', state=self.state)
+                return
+
+            try:
+                response = msg.get(RX_RESPONSE_KEY)
+
+                if isinstance(response, OmciFrame) and \
+                        isinstance(response.fields.get('omci_message'), OmciGetAllAlarmsResponse):
+                    # ONU will reset its last alarm sequence number to 0 on receipt of the
+                    # Get All Alarms request
+                    self.log.debug('received-alarm-response')
+                    self.reset_alarm_sequence()
+
+            except Exception as e:
+                self.log.exception('upload-alarm-failure', e=e)
+
+    def on_alarm_notification(self, _topic, msg):
+        """
+        Process an alarm Notification
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with keys:
+                    TX_REQUEST_KEY  -> None (this is an autonomous msg)
+                    RX_RESPONSE_KEY -> OmciMessage (Alarm notification frame)
+        """
+        self.log.debug('on-alarm-update-response', state=self.state, msg=msg)
+
+        alarm_msg = msg.get(RX_RESPONSE_KEY)
+        if alarm_msg is not None:
+            omci_msg = alarm_msg.fields['omci_message'].fields
+            class_id = omci_msg['entity_class']
+            seq_no = omci_msg['alarm_sequence_number']
+
+            # Validate that this ME supports alarm notifications
+            if class_id not in self._device.me_map or \
+                    OP.AlarmNotification not in self._device.me_map[class_id].notifications or \
+                    len(self._device.me_map[class_id].alarms) == 0:
+                self.log.warn('invalid-alarm-notification', class_id=class_id)
+                return
+
+            self.process_alarm_data(class_id,
+                                    omci_msg['entity_id'],
+                                    omci_msg['alarm_bit_map'],
+                                    seq_no)
+
+    def process_alarm_data(self, class_id, entity_id, bitmap, msg_seq_no):
+        """
+        Process new alarm data
+
+        :param class_id: (int)  Class ID of alarm
+        :param entity_id: (int) Entity ID of alarm
+        :param bitmap: (long) Alarm bitmap value
+        :param msg_seq_no: (int) Alarm sequence number. -1 if generated during an audit
+        """
+        if msg_seq_no > 0:
+            # increment alarm number & compare to alarm # in message
+            # Signal early audit if no match and audits are enabled
+            self.increment_alarm_sequence()
+
+            if self.last_alarm_sequence != msg_seq_no and self._audit_delay > 0:
+                self._deferred = reactor.callLater(0, self.audit_alarm)
+
+        key = AlarmDbExternal.ALARM_BITMAP_KEY
+        prev_entry = self._database.query(self._device_id, class_id, entity_id)
+        try:
+            # Need to access the bit map structure which is nested in dict attributes
+            prev_bitmap = 0 if len(prev_entry) == 0 else long(prev_entry['attributes'][key])
+        except Exception as e:
+            self.log.exception('alarm-prev-entry-collection-failure', class_id=class_id,
+                               device_id=self._device_id, entity_id=entity_id, value=bitmap, e=e)
+        # Save current entry before going on
+        try:
+            self._database.set(self._device_id, class_id, entity_id, {key: bitmap})
+
+        except Exception as e:
+            self.log.exception('alarm-save-failure', class_id=class_id,
+                               device_id=self._device_id, entity_id=entity_id, value=bitmap, e=e)
+
+        if self._alarm_manager is not None:
+            # Generate a set of alarm number that are raised in current and previous
+            previously_raised = {alarm_no for alarm_no in xrange(224)
+                                 if prev_bitmap & (1L << (223-alarm_no)) != 0L}
+
+            currently_raised = {alarm_no for alarm_no in xrange(224)
+                                if bitmap & (1L << (223-alarm_no)) != 0L}
+
+            newly_cleared = previously_raised - currently_raised
+            newly_raised = currently_raised - previously_raised
+
+            # Generate the set/clear alarms now
+            for alarm_number in newly_cleared:
+                reactor.callLater(0, self.clear_alarm, class_id, entity_id, alarm_number)
+
+            for alarm_number in newly_raised:
+                reactor.callLater(0, self.raise_alarm, class_id, entity_id, alarm_number)
+
+    def get_alarm_description(self, class_id, alarm_number):
+        """
+        Get the alarm description, both as a printable-string and also a CamelCase value
+        """
+        if alarm_number in self._device.me_map[class_id].alarms:
+            description = self._device.me_map[class_id].alarms[alarm_number]
+        elif alarm_number <= 207:
+            description = 'Reserved alarm {}'.format(alarm_number)
+        else:
+            description = 'Vendor specific alarm {}'.format(alarm_number)
+
+        # For CamelCase, replace hyphens with spaces before camel casing the string
+        return description, description.replace('-', ' ').title().replace(' ', '')
+
+    def raise_alarm(self, class_id, entity_id, alarm_number):
+        """
+        Raise an alarm on the ONU
+
+        :param class_id: (int)  Class ID of the Alarm ME
+        :param entity_id: (int) Entity ID of the Alarm
+        :param alarm_number: (int) Alarm number (bit) that is alarmed
+        """
+        description, name = self.get_alarm_description(class_id, alarm_number)
+
+        self.log.warn('alarm-set', class_id=class_id, entity_id=entity_id,
+                      alarm_number=alarm_number, name=name, description=description)
+
+        if self._alarm_manager is not None:
+            alarm = self.omci_alarm_to_onu_alarm(class_id, entity_id, alarm_number)
+            if alarm is not None:
+                alarm.raise_alarm()
+
+    def clear_alarm(self, class_id, entity_id, alarm_number):
+        """
+        Lower/clear an alarm on the ONU
+
+        :param class_id: (int)  Class ID of the Alarm ME
+        :param entity_id: (int) Entity ID of the Alarm
+        :param alarm_number: (int) Alarm number (bit) that is alarmed
+        """
+        description, name = self.get_alarm_description(class_id, alarm_number)
+
+        self.log.info('alarm-cleared', class_id=class_id, entity_id=entity_id,
+                      alarm_number=alarm_number, name=name, description=description)
+
+        if self._alarm_manager is not None:
+            alarm = self.omci_alarm_to_onu_alarm(class_id, entity_id, alarm_number)
+            if alarm is not None:
+                alarm.clear_alarm()
+
+    def query_mib(self, class_id=None, instance_id=None):
+        """
+        Get Alarm database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises DatabaseStateError: If the database is not enabled or does not exist
+        """
+        from voltha.extensions.omci.database.mib_db_api import DatabaseStateError
+
+        self.log.debug('query', class_id=class_id, instance_id=instance_id)
+        if self._database is None:
+            raise DatabaseStateError('Database does not yet exist')
+
+        return self._database.query(self._device_id, class_id=class_id, instance_id=instance_id)
+
+    def omci_alarm_to_onu_alarm(self, class_id, entity_id, alarm_number):
+        """
+        Map an OMCI Alarm Notification alarm to the proper ONU Alarm Library alarm
+
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Class instance ID
+        :param alarm_number: (int) Alarm Number
+        :return: (AlarmBase) Alarm library alarm or None if not supported/found
+        """
+        from voltha.extensions.alarms.onu.onu_dying_gasp_alarm import OnuDyingGaspAlarm
+        from voltha.extensions.alarms.onu.onu_los_alarm import OnuLosAlarm
+        from voltha.extensions.alarms.onu.onu_equipment_alarm import OnuEquipmentAlarm
+        from voltha.extensions.alarms.onu.onu_selftest_failure_alarm import OnuSelfTestFailureAlarm
+        from voltha.extensions.alarms.onu.onu_laser_eol_alarm import OnuLaserEolAlarm
+        from voltha.extensions.alarms.onu.onu_laser_bias_current_alarm import OnuLaserBiasAlarm
+        from voltha.extensions.alarms.onu.onu_temp_yellow_alarm import OnuTempYellowAlarm
+        from voltha.extensions.alarms.onu.onu_temp_red_alarm import OnuTempRedAlarm
+        from voltha.extensions.alarms.onu.onu_voltage_yellow_alarm import OnuVoltageYellowAlarm
+        from voltha.extensions.alarms.onu.onu_voltage_red_alarm import OnuVoltageRedAlarm
+        from voltha.extensions.alarms.onu.onu_low_rx_optical_power_alarm import OnuLowRxOpticalAlarm
+        from voltha.extensions.alarms.onu.onu_high_rx_optical_power_alarm import OnuHighRxOpticalAlarm
+        from voltha.extensions.alarms.onu.onu_low_tx_optical_power_alarm import OnuLowTxOpticalAlarm
+        from voltha.extensions.alarms.onu.onu_high_tx_optical_power_alarm import OnuHighTxOpticalAlarm
+
+        mgr = self._alarm_manager
+        if class_id in (CircuitPack.class_id, PptpEthernetUni.class_id):
+            intf_id = self.select_uni_port(class_id, entity_id)
+
+        elif class_id in (AniG.class_id, OntG.class_id):
+            intf_id = self.select_ani_port(class_id, entity_id)
+
+        else:
+            self.log.error('unsupported-class-id', class_id=class_id, alarm_number=alarm_number)
+            return
+
+        alarm_map = {
+            (CircuitPack.class_id, 0): OnuEquipmentAlarm,
+            (CircuitPack.class_id, 2): OnuSelfTestFailureAlarm,
+            (CircuitPack.class_id, 3): OnuLaserEolAlarm,
+            (CircuitPack.class_id, 4): OnuTempYellowAlarm,
+            (CircuitPack.class_id, 5): OnuTempRedAlarm,
+
+            (PptpEthernetUni.class_id, 0): OnuLosAlarm,
+
+            (OntG.class_id, 0): OnuEquipmentAlarm,
+            (OntG.class_id, 6): OnuSelfTestFailureAlarm,
+            (OntG.class_id, 7): OnuDyingGaspAlarm,
+            (OntG.class_id, 8): OnuTempYellowAlarm,
+            (OntG.class_id, 9): OnuTempRedAlarm,
+            (OntG.class_id, 10): OnuVoltageYellowAlarm,
+            (OntG.class_id, 11): OnuVoltageRedAlarm,
+
+            (AniG.class_id, 0): OnuLowRxOpticalAlarm,
+            (AniG.class_id, 1): OnuHighRxOpticalAlarm,
+            (AniG.class_id, 4): OnuLowTxOpticalAlarm,
+            (AniG.class_id, 5): OnuHighTxOpticalAlarm,
+            (AniG.class_id, 6): OnuLaserBiasAlarm,
+        }
+        alarm_cls = alarm_map.get((class_id, alarm_number))
+
+        return alarm_cls(mgr, self._onu_id, intf_id) if alarm_cls is not None else None
+
+    def select_uni_port(self, class_id, entity_id):
+        """
+        Select the best possible UNI Port (logical) interface number for this ME class and
+        entity ID.
+
+        This base implementation will assume that a UNI Port object has been registered
+        on startup and supports both an 'entity_id' and also 'logical_port_number'
+        property.  See both the Adtran and BroadCom OpenOMCI ONU DA for an example
+        of this UNI port object.
+
+        :param class_id: (int)  ME Class ID for which the alarms belongs to
+        :param entity_id: (int) Instance ID
+
+        :return: (int) Logical Port number for the UNI port
+        """
+        # NOTE: Of the three class ID's supported in this version of code, only the CircuitPack,
+        #       and PptpEthernetUni MEs will map to the UNI port
+        assert class_id in (CircuitPack.class_id, PptpEthernetUni.class_id)
+
+        return next((uni.logical_port_number for uni in self._uni_ports if
+                     uni.entity_id == entity_id), None)
+
+    def select_ani_port(self, class_id, _entity_id):
+        """
+        Select the best possible ANI Port (physical) interface number for this ME class and
+        entity ID.
+
+        Currently the base implementation assumes only a single PON port and it will be
+        chosen.  A future implementation may want to have a PON Port object (similar to
+        the BroadCom Open OMCI and Adtran ONU's UNI Port object) that provides a match
+        for entity ID.  This does assume that the PON port object supports a property
+        of 'port_number' to return the physical port number.
+
+        :param class_id: (int)  ME Class ID for which the alarms belongs to
+        :param _entity_id: (int) Instance ID
+
+        :return: (int) Logical Port number for the UNI port
+        """
+        # NOTE: Of the three class ID's supported in this version of code, only the AniG
+        #       MEs will map to the ANI port. For some the OntG alarms (Dying Gasp) the
+        #       PON interface will also be selected.
+        assert class_id in (AniG.class_id, OntG.class_id)
+
+        return self._ani_ports[0].port_number if len(self._ani_ports) else None
diff --git a/python/extensions/omci/state_machines/image_agent.py b/python/extensions/omci/state_machines/image_agent.py
new file mode 100755
index 0000000..e6d5884
--- /dev/null
+++ b/python/extensions/omci/state_machines/image_agent.py
@@ -0,0 +1,1024 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import os
+import structlog
+from datetime import datetime, timedelta
+from binascii import crc32, hexlify
+from transitions import Machine
+from transitions.extensions.nesting import HierarchicalMachine as HMachine
+from twisted.python import failure
+from twisted.internet import reactor
+from twisted.internet.defer import Deferred, CancelledError
+from common.event_bus import EventBusClient
+from voltha.protos.voltha_pb2 import ImageDownload
+from voltha.protos.omci_mib_db_pb2 import OpenOmciEventType
+from voltha.extensions.omci.omci_defs import EntityOperations, ReasonCodes, AttributeAccess, OmciSectionDataSize
+from voltha.extensions.omci.omci_entities import SoftwareImage
+from voltha.extensions.omci.omci_cc import DEFAULT_OMCI_TIMEOUT
+from voltha.extensions.omci.omci_messages import OmciEndSoftwareDownloadResponse, OmciActivateImageResponse
+
+###################################################################################
+##              OLT out-of-band download image procedure
+###################################################################################
+
+class ImageDownloadeSTM(object):
+    DEFAULT_STATES = ['disabled', 'downloading', 'validating', 'done']
+    DEFAULT_TRANSITIONS = [
+        {'trigger': 'start', 'source': 'disabled', 'dest': 'downloading'},
+        {'trigger': 'stop',  'source': ['downloading', 'validating', 'done'], 'dest': 'disabled'},
+        {'trigger': 'dw_success', 'source': 'downloading', 'dest': 'validating'},
+        {'trigger': 'dw_fail', 'source': 'downloading', 'dest': 'done'},
+        {'trigger': 'validate_success', 'source': 'validating', 'dest': 'done'},
+    ]
+    DEFAULT_TIMEOUT_RETRY = 1000      # Seconds to delay after task failure/timeout
+
+    # def __init__(self, omci_agent, dev_id, local_name, local_dir, remote_url, download_task, 
+    def __init__(self, omci_agent, image_download, 
+                     download_task_cls, 
+                     states=DEFAULT_STATES,
+                     transitions=DEFAULT_TRANSITIONS,
+                     initial_state='disabled',
+                     timeout_delay=DEFAULT_TIMEOUT_RETRY,
+                     advertise_events=True, clock=None):
+        """
+        :Param: omci_agent:	(OpenOMCIAgent)
+        :Param: image_dnld: (ImageDownload)
+                            ImageDownload.id  : device id
+                            ImageDownload.name: file name of the image 
+                            ImageDownload.url : URL to download the image from server
+                            ImageDownload.local_dir: local directory of the image file
+        """
+        self.log = structlog.get_logger(device_id=image_download.id)
+        self._agent = omci_agent
+        # self._imgdw = ImageDownload()
+        # self._imgdw.name = local_name
+        # self._imgdw.id   = dev_id
+        # self._imgdw.url  = remote_url
+        # self._imgdw.local_dir = local_dir
+        self._imgdw = image_download
+        # self._imgdw.state = ImageDownload.DOWNLOAD_UNKNOWN   # voltha_pb2
+
+        self._download_task_cls = download_task_cls
+        self._timeout_delay   = timeout_delay
+
+        self._current_task  = None
+        self._task_deferred = None
+        self._ret_deferred  = None
+        self._timeout_dc = None    # DelayedCall
+        self._advertise_events = advertise_events
+        self.reactor = clock if clock is not None else reactor 
+
+        self.log.debug("ImageDownloadeSTM", image_download=self._imgdw)
+        self.machine = Machine(model=self, states=states,
+                               transitions=transitions,
+                               initial=initial_state,
+                               queued=True,
+                               name='{}-{}'.format(self.__class__.__name__, self._imgdw.id))
+    # @property
+    # def name(self):
+    #     return self._imgdw.name
+
+    def _cancel_timeout(self):
+        d, self._timeout_dc = self._timeout_dc, None
+        if d is not None and not d.called:
+            d.cancel()
+
+    @property
+    def status(self):
+        return self._imgdw
+
+    @property
+    def deferred(self):
+        return self._ret_deferred
+        
+    def advertise(self, event, info):
+        """Advertise an event on the OpenOMCI event bus"""
+        if self._advertise_events:
+            self._agent.advertise(event,
+                                  {
+                                      'state-machine': self.machine.name,
+                                      'info': info,
+                                      'time': str(datetime.utcnow())
+                                  })
+
+    # def reset(self):
+    #     """
+    #     Reset all the state machine to intial state
+    #     It is used to clear failed result in last downloading
+    #     """
+    #     self.log.debug('reset download', image_download=self._imgdw)
+    #     if self._current_task is not None:
+    #         self._current_task.stop()
+            
+    #     self._cancel_deferred()
+        
+    #     if self._ret_deferred is not None:
+    #         self._ret_deferred.cancel()
+    #         self._ret_deferred = None
+
+    #     self.stop()
+    #     self._imgdw.state = ImageDownload.DOWNLOAD_UNKNOWN
+        
+    def get_file(self):
+        """
+          return a Deferred object
+          Caller will register a callback to the Deferred to get notified once the image is available
+        """
+        # self.log.debug('get_file', image_download=self._imgdw)
+        if self._ret_deferred is None or self._ret_deferred.called:
+            self._ret_deferred = Deferred()
+            
+        if self._imgdw.state == ImageDownload.DOWNLOAD_SUCCEEDED:
+            self.log.debug('Image Available')
+            self.reactor.callLater(0, self._ret_deferred.callback, self._imgdw)
+        elif self._imgdw.state == ImageDownload.DOWNLOAD_FAILED or self._imgdw.state == ImageDownload.DOWNLOAD_UNSUPPORTED:
+            self.log.debug('Image not exist')
+            self.reactor.callLater(0, self._ret_deferred.errback, failure.Failure(Exception('Image Download Failed ' + self._imgdw.name)))
+        elif self._imgdw.state == ImageDownload.DOWNLOAD_UNKNOWN or self._imgdw.state == ImageDownload.DOWNLOAD_REQUESTED:
+            self.log.debug('Start Image STM')
+            self._imgdw.state = ImageDownload.DOWNLOAD_STARTED
+            self.reactor.callLater(0, self.start)
+        else:
+            self.log.debug('NO action', state=self._imgdw.state)
+            
+        return self._ret_deferred
+            
+    def timeout(self):
+        self.log.debug('Image Download Timeout', download_task=self._current_task);
+        if self._current_task:
+            self.reactor.callLater(0, self._current_task.stop)
+        # if self._task_deferred is not None and not self._task_deferred.called:
+        #     self._task_deferred.cancel()
+            self._current_task = None
+        # else:
+        #     self.dw_fail()
+            
+    def on_enter_downloading(self):
+        self.log.debug("on_enter_downloading")
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        def success(results):
+            self.log.debug('image-download-success', results=results)
+            self._imgdw.state = ImageDownload.DOWNLOAD_SUCCEEDED
+            self._imgdw.reason = ImageDownload.NO_ERROR
+            self._current_task = None
+            self._task_deferred = None
+            self.dw_success()
+
+        def failure(reason):
+            self.log.info('image-download-failure', reason=reason)
+            if self._imgdw.state == ImageDownload.DOWNLOAD_STARTED:
+                self._imgdw.state = ImageDownload.DOWNLOAD_FAILED
+            if isinstance(reason, CancelledError): 
+                self._imgdw.reason = ImageDownload.CANCELLED
+            self._current_task = None
+            self._task_deferred = None
+            self.dw_fail()
+
+        self._device = self._agent.get_device(self._imgdw.id)
+        self._current_task = self._download_task_cls(self._agent, self._imgdw, self.reactor)
+
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+        self._imgdw.state = ImageDownload.DOWNLOAD_STARTED
+
+        if self._timeout_delay > 0:
+            self._timeout_dc = self.reactor.callLater(self._timeout_delay, self.timeout)
+
+    def on_enter_validating(self):
+        self.log.debug("on_enter_validating")
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self.validate_success()
+
+    def on_enter_done(self):
+        self.log.debug("on_enter_done")
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_timeout()
+
+        d, self._ret_deferred = self._ret_deferred, None
+        if d is not None:
+            if self._imgdw.state == ImageDownload.DOWNLOAD_SUCCEEDED:
+                self.reactor.callLater(0, d.callback, self._imgdw)
+            else:  # failed
+                if self._imgdw.reason == ImageDownload.CANCELLED:
+                    self.reactor.callLater(0, d.cancel)
+                else:
+                    self.reactor.callLater(0, d.errback, failure.Failure(Exception('Image Download Failed ' + self._imgdw.name)))
+            
+    def on_enter_disabled(self):
+        self.log.debug("on_enter_disabled")
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        self._cancel_timeout()
+        if self._current_task is not None:
+            self.reactor.callLater(0, self._current_task.stop)
+            self._current_task = None
+
+        if self._ret_deferred:
+            self.reactor.callLater(0, self._ret_deferred.cancel)
+            self._ret_deferred = None
+            
+        # remove local file fragments if download failed
+        file_path = self._imgdw.local_dir + '/' + self._imgdw.name
+        if self._imgdw.state != ImageDownload.DOWNLOAD_SUCCEEDED and os.path.exists(file_path):
+            os.remove(file_path)            
+        self._imgdw.state = ImageDownload.DOWNLOAD_UNKNOWN
+
+###################################################################################
+##              OMCI Software Image Download Procedure
+###################################################################################
+
+class OmciSoftwareImageDownloadSTM(object):
+    
+    OMCI_SWIMG_DOWNLOAD_TIMEOUT = 5400      # TODO: Seconds for the full downloading procedure to avoid errors that cause infinte downloading
+    OMCI_SWIMG_DOWNLOAD_WINDOW_SIZE = 32
+    OMCI_SWIMG_WINDOW_RETRY_MAX = 2
+    OMCI_SWIMG_ACTIVATE_RETRY_MAX = 2
+    OMCI_SWIMG_ACTIVATE_TRANSITIONS_TIMEOUT = 10      # Seconds to delay after task failure/timeout
+
+    # def __init__(self, omci_agent, dev_id, img_path, 
+    def __init__(self, image_id, omci_agent, image_dnld,
+                     window_size=OMCI_SWIMG_DOWNLOAD_WINDOW_SIZE,
+                     timeout_delay=OMCI_SWIMG_DOWNLOAD_TIMEOUT,
+                     advertise_events=True,
+                     clock=None):
+        """
+        omci_agent:	(OpenOMCIAgent)
+        image_dnld: (ImageDownload)
+                    ImageDownload.id  : device id
+                    ImageDownload.name: file name of the image 
+                    ImageDownload.url : URL to download the image from server
+                    ImageDownload.local_dir: local directory of the image file
+        window_size: window size of OMCI download procedure 
+        """
+        self.log = structlog.get_logger(device_id=image_dnld.id)
+        self._omci_agent = omci_agent
+        self._image_download = image_dnld
+        self._timeout = timeout_delay
+        self._timeout_dc = None
+        self._window_size = window_size
+        self.reactor = clock if clock is not None else reactor
+        self._offset = 0
+        # self._win_section = 0
+        self._win_retry = 0
+        self._device_id = image_dnld.id
+        self._device = omci_agent.get_device(image_dnld.id)
+        self.__init_state_machine()
+        self._ret_deferred = None
+        self._image_id = image_id    # Target software image entity ID
+        self._image_file = image_dnld.local_dir + '/' + image_dnld.name
+        self._image_obj = open(self._image_file, mode='rb')
+        self._image_size = os.path.getsize(self._image_file)
+        self._crc32 = 0
+        self._win_crc32 = 0
+        self._win_data = None
+        self._current_deferred = None
+        self._result = None    # ReasonCodes
+        self.crctable = []
+        self._crctable_init = False
+        self._actimg_retry_max = OmciSoftwareImageDownloadSTM.OMCI_SWIMG_ACTIVATE_RETRY_MAX
+        self._actimg_retry = 0
+        self.log.debug("DownloadSTM", image=self._image_file, image_size=self._image_size)
+ 
+    def __init_state_machine(self):
+
+        #### Download Window Sub State Machine ####
+        OMCI_DOWNLOAD_WINDOW_STATE = ['init_window', 'sending_sections', 'window_success', 'window_failed']
+        OMCI_DOWNLOAD_WINDOW_TRANSITIONS = [
+            {'trigger': 'send_sections',  'source': 'init_window',     'dest': 'sending_sections'},
+            # {'trigger': 'send_section_last',  'source': 'start_section', 'dest': 'last_section'  },
+            {'trigger': 'rx_ack_success', 'source': 'sending_sections', 'dest': 'window_success' },
+            {'trigger': 'rx_ack_failed',  'source': 'sending_sections', 'dest': 'window_failed'  },
+            # {'trigger': 'retry_window',   'source': 'window_failed', 'dest': 'start_section'  },
+            {'trigger': 'reset_window',   'source': '*',               'dest': 'init_window'    }
+        ]    
+        self.win_machine = HMachine(model=self, 
+                                    states=OMCI_DOWNLOAD_WINDOW_STATE,
+                                    transitions=OMCI_DOWNLOAD_WINDOW_TRANSITIONS,
+                                    initial='init_window',
+                                    queued=True,
+                                    name='{}-window_section_machine'.format(self.__class__.__name__))
+
+        #### Software Activation Sub State Machine ####
+        OMCI_SWIMG_ACTIVATE_STATES = ['init_act', 'activating', 'busy', 'rebooting', 'committing', 'done', 'failed']
+        OMCI_SWIMG_ACTIVATE_TRANSITIONS = [
+            {'trigger': 'activate', 'source': ['init_act', 'busy'], 'dest': 'activating'},
+            {'trigger': 'onu_busy', 'source': 'activating', 'dest': 'busy'},
+            {'trigger': 'reboot',   'source': 'activating', 'dest': 'rebooting'},
+            {'trigger': 'do_commit', 'source': ['activating', 'rebooting'], 'dest': 'committing'},
+            # {'trigger': 'commit_ok', 'source': 'committing', 'dest': 'done'},
+            {'trigger': 'reset_actimg', 'source': ['activating', 'rebooting', 'committing', 'failed'], 'dest': 'init_act'},
+            # {'trigger': 'actimg_fail', 'source': ['init_act', 'activating', 'rebooting', 'committing'], 'dest': 'failed'}
+        ]
+        
+        self.activate_machine = HMachine(model=self, 
+                                         states=OMCI_SWIMG_ACTIVATE_STATES,
+                                         transitions=OMCI_SWIMG_ACTIVATE_TRANSITIONS,
+                                         initial='init_act',
+                                         queued=True,
+                                         name='{}-activate_machine'.format(self.__class__.__name__))
+                                   
+        #### Main State Machine ####
+        OMCI_SWIMG_DOWNLOAD_STATES = [ 'init_image', 'starting_image', 'ending_image', 'endimg_busy', 'done_image',
+                                      {'name': 'dwin', 'children': self.win_machine}, 
+                                      {'name': 'actimg', 'children': self.activate_machine}
+                                     ]
+        OMCI_SWIMG_DOWNLOAD_TRANSITIONS = [
+            {'trigger': 'start_image',      'source': 'init_image',     'dest': 'starting_image' },
+            {'trigger': 'download_window',  'source': 'starting_image', 'dest': 'dwin_init_window' },
+            {'trigger': 'download_success', 'source': 'dwin',           'dest': 'ending_image'   },
+            {'trigger': 'onu_busy',         'source': 'ending_image',   'dest': 'endimg_busy'    },
+            {'trigger': 'retry_endimg',     'source': 'endimg_busy',    'dest': 'ending_image'   },
+            {'trigger': 'end_img_success',  'source': 'ending_image',   'dest': 'actimg_init_act'  },
+            {'trigger': 'activate_done',    'source': 'actimg',         'dest': 'done_image'     },
+            {'trigger': 'download_fail',    'source': '*',              'dest': 'done_image'     },
+            {'trigger': 'reset_image',      'source': '*',              'dest': 'init_image'     },
+        ]
+        
+        self.img_machine = HMachine(model=self, 
+                                   states=OMCI_SWIMG_DOWNLOAD_STATES,
+                                   transitions=OMCI_SWIMG_DOWNLOAD_TRANSITIONS,
+                                   initial='init_image',
+                                   queued=True,
+                                   name='{}-image_download_machine'.format(self.__class__.__name__))
+
+    # @property
+    # def image_filename(self):
+    #     return self._image_file
+
+    # @image_filename.setter
+    # def image_filename(self, value):
+    #     if self._image_fd is not None:
+    #         self._image_fd.close()
+    #     self._image_filename = value
+    #     self._image_fd = open(self._image_filename, mode='rb')
+    #     self._image_size = os.path.getsize(self._image_filename)
+    #    print("Set image file: " + self._image_filename + " size: " + str(self._image_size))
+
+    def __omci_start_download_resp_success(self, rx_frame):
+        self.log.debug("__omci_download_resp_success")
+        self.download_window()
+        return rx_frame
+
+    def __omci_start_download_resp_fail(self, fail):
+        self.log.debug("__omci_download_resp_fail", failure=fail)
+        self._result = ReasonCodes.ProcessingError
+        self.download_fail()
+
+    def __omci_end_download_resp_success(self, rx_frame):
+        self.log.debug("__omci_end_download_resp_success")
+        if rx_frame.fields['message_type'] == OmciEndSoftwareDownloadResponse.message_id: # 0x35
+            omci_data = rx_frame.fields['omci_message']
+            if omci_data.fields['result'] == 0: 
+                self.log.debug('OMCI End Image OK')
+                self._result = ReasonCodes.Success
+                self.end_img_success()
+            elif omci_data.fields['result'] == 6: # Device Busy
+                self.log.debug('OMCI End Image Busy')
+                self.onu_busy()
+            else:
+                self.log.debug('OMCI End Image Failed', reason=omci_data.fields['result'])
+        else:
+            self.log.debug('Receive Unexpected OMCI', message_type=rx_frame.fields['message_type'])
+
+    def __omci_end_download_resp_fail(self, fail):
+        self.log.debug("__omci_end_download_resp_fail", failure=fail)
+        self._result = ReasonCodes.ProcessingError
+        self.download_fail()
+    
+    def __omci_send_window_resp_success(self, rx_frame, cur_state, datasize):
+        # self.log.debug("__omci_send_window_resp_success", current_state=cur_state)
+        self._offset += datasize
+        self._image_download.downloaded_bytes += datasize
+        self.rx_ack_success()
+
+    def __omci_send_window_resp_fail(self, fail, cur_state):
+        self.log.debug("__omci_send_window_resp_fail", current_state=cur_state)
+        self.rx_ack_failed()
+
+    def __activate_resp_success(self, rx_frame):
+        self._current_deferred = None
+        if rx_frame.fields['message_type'] == OmciActivateImageResponse.message_id: # 0x36
+            omci_data = rx_frame.fields['omci_message']
+            if omci_data.fields['result'] == 0:
+                self.log.debug("Activate software image success, rebooting ONU ...", device_id=self._device.device_id,
+                                state=self._image_download.image_state)
+                standby_image_id = 0 if self._image_id else 1
+                self._omci_agent.database.set(self._device.device_id, SoftwareImage.class_id, self._image_id, 	{"is_active": 1})
+                self._omci_agent.database.set(self._device.device_id, SoftwareImage.class_id, standby_image_id, {"is_active": 0})
+                self.reboot()
+            elif omci_data.fields['result'] == 6: # Device Busy
+                self.log.debug('OMCI Activate Image Busy')
+                self.onu_busy()
+            else:
+                self.log.debug('OMCI Activate Image Failed', reason=omci_data['result'])
+        else:
+            self.log.debug('Receive Unexpected OMCI', message_type=rx_frame['message_type'])
+                
+    def __activate_fail(self, fail):
+        self.log.debug("Activate software image failed", faile=fail)
+        self._current_deferred = None
+        self._result = ReasonCodes.ProcessingError
+        self.activate_done()
+        
+    def __commit_success(self, rx_frame):
+        self.log.debug("Commit software success", device_id=self._device_id)
+        self._current_deferred = None
+        standby_image_id = 0 if self._image_id else 1
+        self._omci_agent.database.set(self._device_id, SoftwareImage.class_id, self._image_id, {"is_committed": 1})
+        self._omci_agent.database.set(self._device_id, SoftwareImage.class_id, standby_image_id, {"is_committed": 0})
+        self._image_download.image_state = ImageDownload.IMAGE_ACTIVE
+        self._result = ReasonCodes.Success
+        self.activate_done()
+
+    def __commit_fail(self, fail):
+        self.log.debug("Commit software image failed", faile=fail)
+        self._current_deferred = None
+        self._result = ReasonCodes.ProcessingError
+        self._image_download.image_state = ImageDownload.IMAGE_REVERT
+        self.activate_done()
+
+#    @property
+#    def image_id(self):
+#        return self._image_id
+
+#    @image_id.setter
+#    def image_id(self, value):
+#        self._image_id = value
+
+    @property
+    def status(self):
+        return self._image_download
+
+    def start(self):
+        self.log.debug("OmciSoftwareImageDownloadSTM.start", current_state=self.state)
+        if self._ret_deferred is None:
+            self._ret_deferred = Deferred()
+        if self.state == 'init_image':
+            self.reactor.callLater(0, self.start_image)
+        return self._ret_deferred
+
+    def stop(self):
+        self.log.debug("OmciSoftwareImageDownloadSTM.stop", current_state=self.state)
+        self._result = ReasonCodes.OperationCancelled
+        self.download_fail()
+        
+    def on_enter_init_image(self):
+        self.log.debug("on_enter_init_image")
+        self._image_obj.seek(0)
+        self._offset = 0
+        # self._win_section = 0
+        self._win_retry   = 0
+        
+    def on_enter_starting_image(self):
+        self.log.debug("on_enter_starting_image")
+        self._image_download.downloaded_bytes = 0
+        self._current_deferred = self._device.omci_cc.send_start_software_download(self._image_id, self._image_size, self._window_size)
+        self._current_deferred.addCallbacks(self.__omci_start_download_resp_success, self.__omci_start_download_resp_fail)
+                                            # callbackArgs=(self.state,), errbackArgs=(self.state,))
+
+    def on_enter_dwin_init_window(self):
+        # self.log.debug("on_enter_dwin_init_window", offset=self._offset, image_size=self._image_size)
+        if self._offset < self._image_size:
+            self.send_sections()
+
+    def on_enter_dwin_sending_sections(self):
+        # self.log.debug("on_enter_dwin_sending_sections", offset=self._offset)
+
+        if (self._offset + self._window_size * OmciSectionDataSize) <= self._image_size:
+            sections = self._window_size
+            mod = 0
+            datasize = self._window_size * OmciSectionDataSize
+        else:
+            datasize = self._image_size - self._offset
+            sections = datasize / OmciSectionDataSize
+            mod = datasize % OmciSectionDataSize
+            sections = sections + 1 if mod > 0 else sections
+
+        # self.log.debug("on_enter_dwin_sending_sections", offset=self._offset, datasize=datasize, sections=sections)
+        if self._win_retry == 0:
+            self._win_data = self._image_obj.read(datasize)
+            self._win_crc32 = self.crc32(self._crc32, self._win_data)
+            # self.log.debug("CRC32", crc32=self._win_crc32, offset=self._offset)
+        else:
+            self.log.debug("Retry download window with crc32", offset=self._offset)
+            
+        sent = 0
+        for i in range(0, sections):
+            if i < sections - 1:
+                # self.log.debug("section data", data=hexlify(data[(self._offset+sent):(self._offset+sent+OmciSectionDataSize)]))
+                self._device.omci_cc.send_download_section(self._image_id, i,
+                                                           self._win_data[sent:sent+OmciSectionDataSize])
+                sent += OmciSectionDataSize
+            else:
+                last_size = OmciSectionDataSize if mod == 0 else mod
+                self._current_deferred = self._device.omci_cc.send_download_section(self._image_id, i,
+                                                           self._win_data[sent:sent+last_size],
+                                                           timeout=DEFAULT_OMCI_TIMEOUT)
+                self._current_deferred.addCallbacks(self.__omci_send_window_resp_success, self.__omci_send_window_resp_fail,
+                                                    callbackArgs=(self.state, datasize), errbackArgs=(self.state,))
+                sent += last_size
+                assert sent==datasize
+
+    # def on_enter_dwin_last_section(self):
+    #     self._current_deferred = self._device.omci_cc.send_download_section, self._instance_id, self._win_section, data)
+    #     self._current_deferred.addCallbacks(self.__omci_resp_success, self.__omci_resp_fail,
+    #                                         callbackArgs=(self.state,), errbackArgs=(self.state,))
+
+    def on_enter_dwin_window_success(self):
+        # self.log.debug("on_enter_dwin_window_success")
+        self._crc32 = self._win_crc32 if self._win_crc32 != 0 else self._crc32
+        self._win_crc32 = 0
+        self._win_retry = 0
+        if self._offset < self._image_size:
+            self.reset_window()
+        else:
+            self.download_success()
+
+    def on_enter_dwin_window_failed(self):
+        self.log.debug("on_enter_dwin_window_fail: ", retry=self._win_retry)
+        if self._win_retry < self.OMCI_SWIMG_WINDOW_RETRY_MAX:
+            self._win_retry += 1
+            self.reset_window()
+        else:
+            self._result = ReasonCodes.ProcessingError
+            self.download_fail()
+
+    def on_enter_ending_image(self):
+        self.log.debug("on_enter_ending_image", crc32=self._crc32)
+        self._current_deferred = self._device.omci_cc.send_end_software_download(self._image_id, self._crc32, 
+                                                                                 self._image_size, timeout=18)
+        self._current_deferred.addCallbacks(self.__omci_end_download_resp_success, self.__omci_end_download_resp_fail)
+                                            # callbackArgs=(self.state,), errbackArgs=(self.state,))
+
+    def on_enter_endimg_busy(self):
+        self.log.debug("on_enter_endimg_busy")
+        self.reactor.callLater(3, self.retry_endimg)
+
+    def on_enter_actimg_init_act(self):
+        self.log.debug("on_enter_actimg_init_act", retry=self._actimg_retry, max_retry=self._actimg_retry_max)
+        # self._images[0] = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 0, ["is_active", "is_committed", "is_valid"])
+        # self._images[1] = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 1, ["is_active", "is_committed", "is_valid"])
+        # if (self._images[self._to_image]["is_active"] != 1 and self._images[self._to_image]["is_valid"] == 1):
+        if self._actimg_retry > self._actimg_retry_max:
+            self.log.debug("activate image failed: retry max", retries=self._actimg_retry)
+            self._result = ReasonCodes.ProcessingError
+            self.activate_done()
+        else:
+            self._image_download.image_state = ImageDownload.IMAGE_ACTIVATE
+            self.activate()
+            
+    def on_enter_actimg_activating(self):
+        self.log.debug("on_enter_actimg_activating")
+        img = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 
+                                              self._image_id, ["is_active", "is_committed", "is_valid"])
+                                              
+        self.log.debug("on_enter_actimg_activating", instance=self._image_id, state=img)
+        if img["is_active"] == 0:
+            #if img["is_valid"] == 1:
+            self._current_deferred = self._device.omci_cc.send_active_image(self._image_id)
+            self._current_deferred.addCallbacks(self.__activate_resp_success, self.__activate_fail)
+            #else:
+            #    self.fail()
+        else:
+            self.do_commit()
+
+    def on_enter_actimg_busy(self):
+        self.log.debug("on_enter_actimg_busy")
+        self.reactor.callLater(3, self.activate)
+        
+    def __on_reboot_timeout(self):
+        self.log.debug("on_reboot_timeout")
+        self._timeout_dc = None
+        self._result = ReasonCodes.ProcessingError
+        self.activate_done()
+        
+    def on_enter_actimg_rebooting(self):
+        self.log.debug("on_enter_actimg_rebooting")
+        if self._timeout_dc == None:
+            self._timeout_dc = self.reactor.callLater(self._timeout, self.__on_reboot_timeout)
+
+    def on_exit_actimg_rebooting(self):
+        self.log.debug("on_exit_actimg_rebooting", timeout=self._timeout_dc)
+        if self._timeout_dc and self._timeout_dc.active:
+            self._timeout_dc.cancel()
+            self._timeout_dc = None
+    
+    def on_enter_actimg_committing(self):
+        # self.log.debug("on_enter_committing")
+        img = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 
+                                              self._image_id, ["is_active", "is_committed", "is_valid"])
+        self.log.debug("on_enter_actimg_committing", instance=self._image_id, state=img)
+        if (img['is_active'] == 0):
+            self._actimg_retry += 1
+            self.log.debug("do retry", retry=self._actimg_retry)
+            self.reset_actimg()
+        else:
+            self._actimg_retry = 0
+            self._current_deferred = self._device.omci_cc.send_commit_image(self._image_id)
+            self._current_deferred.addCallbacks(self.__commit_success, self.__commit_fail)
+
+    def on_enter_done_image(self):
+        self.log.debug("on_enter_done_image", result=self._result)
+        if self._result == ReasonCodes.Success:
+            self.reactor.callLater(0, self._ret_deferred.callback, self._image_download) # (str(self._instance_id))
+        else:
+            self._ret_deferred.errback(failure.Failure(Exception('ONU Software Download Failed, instance ' + str(self._image_id))))
+
+    def __crc_GenTable32(self):
+        if self._crctable_init:
+            return
+            
+        #  x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1   
+        pn32 = [0, 1, 2, 4, 5, 7, 8, 10, 11, 12, 16, 22, 23, 26]
+        poly = 0
+        for i in pn32:
+            poly |= (1 << i)
+
+        for i in range(0, 256):
+            _accum = (i << 24) & 0xFFFFFFFF
+            for j in range(0, 8):
+                if _accum & (1 << 31):
+                    _accum = (_accum << 1) ^ poly
+                else:
+                    _accum = (_accum << 1) & 0xFFFFFFFF
+            # self.crctable[i] = accum
+            self.crctable.append(_accum)
+        self._crctable_init = True
+            
+    def crc32(self, accum, data):
+        self.__crc_GenTable32()
+        _accum = ~accum & 0xFFFFFFFF
+        num = len(data)
+        for i in range(0, num):
+            _accum = self.crctable[((_accum >> 24) ^ ord(data[i])) & 0xFF] ^ ((_accum << 8) & 0xFFFFFFFF)
+
+        return ~_accum & 0xFFFFFFFF
+
+###################################################################################
+##              OMCI Software Image Activation/Committing Procedure
+###################################################################################
+'''
+class OmciSoftwareImageActivateSTM(object):
+    OMCI_SWIMG_ACTIVATE_STATES = ['starting', 'activating', 'busy', 'rebooting', 'committing', 'done', 'failed']
+    OMCI_SWIMG_ACTIVATE_TRANSITIONS = [
+        {'trigger': 'activate', 'source': ['starting', 'busy'], 'dest': 'activating'},
+        {'trigger': 'onu_busy', 'source': 'activating', 'dest': 'busy'},
+        {'trigger': 'reboot',   'source': 'activating', 'dest': 'rebooting'},
+        {'trigger': 'do_commit', 'source': ['activating', 'rebooting'], 'dest': 'committing'},
+        {'trigger': 'commit_ok', 'source': 'committing', 'dest': 'done'},
+        {'trigger': 'reset',    'source': ['activating', 'rebooting', 'committing', 'failed'], 'dest': 'starting'},
+        {'trigger': 'fail',     'source': ['starting', 'activating', 'rebooting', 'committing'], 'dest': 'failed'}
+    ]
+    OMCI_SWIMG_ACTIVATE_TRANSITIONS_TIMEOUT = 10      # Seconds to delay after task failure/timeout
+    OMCI_SWIMG_ACTIVATE_RETRY_MAX           = 2
+    def __init__(self, omci_agent, dev_id, target_img_entity_id, image_download,
+                     states=OMCI_SWIMG_ACTIVATE_STATES,
+                     transitions=OMCI_SWIMG_ACTIVATE_TRANSITIONS,
+                     initial_state='disabled',
+                     timeout_delay=OMCI_SWIMG_ACTIVATE_TRANSITIONS_TIMEOUT,
+                     advertise_events=True,
+                     clock=None):
+        self.log = structlog.get_logger(device_id=dev_id)
+        self._omci_agent = omci_agent
+        self._device_id  = dev_id
+        self._device = omci_agent.get_device(dev_id)
+        self._to_image = target_img_entity_id
+        self._from_image = 0 if self._to_image == 1 else 1
+        self._image_download = image_download
+        # self._images = dict()
+        self._timeout = timeout_delay
+        self._timeout_dc = None
+        self.reactor = clock if clock is not None else reactor
+        self._retry_max = OmciSoftwareImageActivateSTM.OMCI_SWIMG_ACTIVATE_RETRY_MAX
+        self._retry = 0
+        self._deferred = None
+        self.ret_deferred = None
+        self.machine = Machine(model=self, 
+                               states=states,
+                               transitions=transitions,
+                               initial='starting',
+                               queued=True,
+                               name='{}-image_activate_machine'.format(self.__class__.__name__))
+        self.log.debug("OmciSoftwareImageActivateSTM", target=self._to_image)
+
+    def __activate_resp_success(self, rx_frame):
+        if rx_frame.fields['message_type'] == 0x36:  # (OmciActivateImageResponse)
+            omci_data = rx_frame.fields['omci_message']
+            if omci_data.fields['result'] == 0:
+                self.log.debug("Activate software image success, rebooting ONU ...", device_id=self._device_id) 
+                self._omci_agent.database.set(self._device_id, SoftwareImage.class_id, self._to_image, 	{"is_active": 1})
+                self._omci_agent.database.set(self._device_id, SoftwareImage.class_id, self._from_image, {"is_active": 0})
+                self.reboot()
+            elif omci_data.fields['result'] == 6: # Device Busy
+                self.log.debug('OMCI Activate Image Busy')
+                self.onu_busy()
+            else:
+                self.log.debug('OMCI Activate Image Failed', reason=omci_data['result'])
+        else:
+            self.log.debug('Receive Unexpected OMCI', message_type=rx_frame['message_type'])
+                
+    def __activate_fail(self, fail):
+        self.log.debug("Activate software image failed", faile=fail)
+        
+    def __commit_success(self, rx_frame):
+        self.log.debug("Commit software success", device_id=self._device_id)
+        self._omci_agent.database.set(self._device_id, SoftwareImage.class_id, self._to_image, {"is_committed": 1})
+        self._omci_agent.database.set(self._device_id, SoftwareImage.class_id, self._from_image, {"is_committed": 0})
+        self.commit_ok()
+
+    def __commit_fail(self, fail):
+        self.log.debug("Commit software image failed", faile=fail)
+
+    @property
+    def status(self):
+        return self._image_download
+        
+    def start(self):
+        self.log.debug("Start switch software image", target=self._to_image)
+        # self._images[0] = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 0, ["is_active", "is_committed", "is_valid"])
+        # self._images[1] = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 1, ["is_active", "is_committed", "is_valid"])
+        # if (self._images[self._to_image]["is_active"] == 0 and self._images[self._to_image]["is_valid"] == 1):
+        self.ret_deferred = Deferred()
+        self._image_download.image_state = ImageDownload.IMAGE_ACTIVATE
+        self.reactor.callLater(0, self.activate)
+        return self.ret_deferred
+
+    def on_enter_starting(self):
+        # self.log.debug("on_enter_starting")
+        # self._images[0] = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 0, ["is_active", "is_committed", "is_valid"])
+        # self._images[1] = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 1, ["is_active", "is_committed", "is_valid"])
+        # if (self._images[self._to_image]["is_active"] != 1 and self._images[self._to_image]["is_valid"] == 1):
+        if self._retry > self._retry_max:
+            self.log.debug("failed: retry max", retries=self._retry)
+            self.fail()
+        else:
+            self.activate()
+            
+    def on_enter_activating(self):
+        img = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 
+                                              self._to_image, ["is_active", "is_committed", "is_valid"])
+                                              
+        self.log.debug("on_enter_activating", instance=self._to_image, state=img)
+        if img["is_active"] == 0:
+            #if img["is_valid"] == 1:
+            self._deferred = self._device.omci_cc.send_active_image(self._to_image)
+            self._deferred.addCallbacks(self.__activate_resp_success, self.__activate_fail)
+            #else:
+            #    self.fail()
+        else:
+            self.do_commit()
+
+    def on_enter_busy(self):
+        self.log.debug("on_enter_busy")
+        self.reactor.callLater(3, self.activate)
+        
+    def on_enter_rebooting(self):
+        self.log.debug("on_enter_rebooting")
+        if self._timeout_dc == None:
+            self._timeout_dc = self.reactor.callLater(self._timeout, self.fail)
+
+    def on_exit_rebooting(self):
+        self.log.debug("on_exit_rebooting")
+        if self._timeout_dc and self._timeout_dc.active:
+            self._timeout_dc.cancel()
+            self._timeout_dc = None
+    
+    def on_enter_committing(self):
+        # self.log.debug("on_enter_committing")
+        img = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 
+                                              self._to_image, ["is_active", "is_committed", "is_valid"])
+        self.log.debug("on_enter_committing", instance=self._to_image, state=img)
+        if (img['is_active'] == 0):
+            self._retry += 1
+            self.log.debug("do retry", retry=self._retry)
+            self.reset()
+        else:
+            self._retry = 0
+            self._deferred = self._device.omci_cc.send_commit_image(self._to_image)
+            self._deferred.addCallbacks(self.__commit_success, self.__commit_fail)
+
+    def on_enter_done(self):
+        self.log.debug("on_enter_done")
+        self._image_download.image_state = ImageDownload.IMAGE_ACTIVE
+        self.ret_deferred.callback(self._to_image)
+
+    def on_enter_failed(self):
+        self.log.debug("on_enter_failed")
+        self._image_download.image_state = ImageDownload.IMAGE_REVERT
+        self.ret_deferred.errback(failure.Failure(Exception('ONU Software Activating Failed, instance ' + str(self._to_image))))
+'''
+
+###################################################################################
+##              Image Agent for OLT/ONT software image handling
+###################################################################################
+class ImageAgent(object):
+    """
+        Image Agent supports multiple state machines running at the same time:
+    """
+
+    DEFAULT_LOCAL_ROOT = "/"
+    
+    # def __init__(self, omci_agent, dev_id, stm_cls, img_tasks, advertise_events=True):
+    def __init__(self, omci_agent, dev_id, 
+                     dwld_stm_cls, dwld_img_tasks, 
+                     upgrade_onu_stm_cls, upgrade_onu_tasks, 
+                     # image_activate_stm_cls, 
+                     advertise_events=True, local_dir=None, clock=None):
+        """
+        Class initialization
+
+        :param omci_agent: (OpenOmciAgent) Agent
+        :param dev_id    : (str) ONU Device ID
+        :param dwld_stm_cls          : (ImageDownloadeSTM) Image download state machine class
+        :param dwld_img_tasks        : (FileDownloadTask) file download task
+        :param upgrade_onu_stm_cls   : (OmciSoftwareImageDownloadSTM) ONU Image upgrade state machine class
+        :param upgrade_onu_tasks     : ({OmciSwImageUpgradeTask})
+        # :param image_activate_stm_cls: (OmciSoftwareImageActivateSTM)
+        """
+        
+        self.log = structlog.get_logger(device_id=dev_id)
+
+        self._omci_agent = omci_agent
+        self._device_id = dev_id
+        self._dwld_stm_cls  = dwld_stm_cls
+        # self._image_download_sm = None
+        self._images = dict()
+        self._download_task_cls = dwld_img_tasks['download-file'] 
+
+        self._omci_upgrade_sm_cls = upgrade_onu_stm_cls
+        self._omci_upgrade_task_cls = upgrade_onu_tasks['omci_upgrade_task']
+        self._omci_upgrade_task = None
+        self._omci_upgrade_deferred = None
+        
+        # self._omci_activate_img_sm_cls = image_activate_stm_cls
+        # self._omci_activate_img_sm = None
+        self.reactor = clock if clock is not None else reactor
+
+        self._advertise_events = advertise_events
+        # self._local_dir = None
+
+        self._device = None
+        # onu_dev = self._omci_agent.get_device(self._device_id)
+        # assert device
+        
+        # self._local_dir = DEFAULT_LOCAL_ROOT + onu_dev.adapter_agent.name
+        # self.log.debug("ImageAgent", local_dir=self._local_dir)
+        
+        
+    def __get_standby_image_instance(self):
+        instance_id = None
+        instance_0 = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 0, ["is_active", "is_committed"])
+        if instance_0['is_active'] == 1:
+            instance_id = 1
+        else:
+            instance_1 = self._omci_agent.database.query(self._device_id, SoftwareImage.class_id, 1, ["is_active", "is_committed"])
+            if instance_1['is_active'] == 1:
+                instance_id = 0
+        return instance_id
+
+    def __clear_task(self, arg):
+        self.__omci_upgrade_task = None
+
+    # def get_image(self, name, local_dir, remote_url, timeout_delay=ImageDownloadeSTM.DEFAULT_TIMEOUT_RETRY):
+    def get_image(self, image_download, timeout_delay=ImageDownloadeSTM.DEFAULT_TIMEOUT_RETRY):
+
+        """
+         Get named image from servers
+        :param image_download: (voltha_pb2.ImageDownload)
+        :param timeout_delay : (number) timeout for download task
+        :
+        :Return a Deferred that will be triggered if the file is locally availabe or downloaded sucessfully
+        :  Caller will register callback and errback to the returned defer to get notified
+        """
+        self.log.debug("get_image", download=image_download)
+
+        # if self._local_dir is None:
+        #     onu_dev = self._omci_agent.get_device(self._device_id)
+        #     assert onu_dev
+        #     if image_download.local_dir is None:
+        #         self._local_dir = ImageAgent.DEFAULT_LOCAL_ROOT + onu_dev.adapter_agent.name
+        #     else:
+        #         self._local_dir = image_download.local_dir + '/' + onu_dev.adapter_agent.name
+            
+            # self.log.debug("ImageAgent", local_dir=self._local_dir)
+        #     image_download.local_dir = self._local_dir
+            
+        # if os.path.isfile(self._local_dir + '/' + image_download.name): # image file exists
+        #     d = Deferred()
+        #     self.reactor.callLater(0, d.callback, image_download)
+        #     self.log.debug("Image file exists")
+        #     return d
+
+        img_dnld_sm = self._images.get(image_download.name)
+        if img_dnld_sm is None:
+            img_dnld_sm = self._dwld_stm_cls(self._omci_agent, # self._device_id, name, local_dir, remote_url, 
+                                             image_download,
+                                             self._download_task_cls,
+                                             timeout_delay=timeout_delay,
+                                             clock=self.reactor
+                                            )
+            self._images[image_download.name] = img_dnld_sm
+
+        # if self._image_download_sm is None:
+        #     self._image_download_sm = self._dwld_stm_cls(self._omci_agent, # self._device_id, name, local_dir, remote_url, 
+        #                                                  image_download,
+        #                                                  self._download_task_cls,
+        #                                                  timeout_delay=timeout_delay,
+        #                                                  clock=self.reactor
+        #                                                 )
+        # else:
+        #     if self._image_download_sm.download_status.state != ImageDownload.DOWNLOAD_SUCCEEDED:
+        #         self._image_download_sm.reset()
+            
+        d = img_dnld_sm.get_file()
+        return d
+
+    def cancel_download_image(self, name):
+        img_dnld_sm = self._images.pop(name, None)
+        if img_dnld_sm is not None:
+            img_dnld_sm.stop()
+            
+            
+    def onu_omci_download(self, image_dnld_name):
+        """
+        Start upgrading ONU.
+        image_dnld: (ImageDownload)
+        : Return Defer instance to get called after upgrading success or failed. 
+        : Or return None if image does not exist
+        """
+        self.log.debug("onu_omci_download", image=image_dnld_name)
+
+        image_dnld_sm = self._images.get(image_dnld_name)
+        if image_dnld_sm is None:
+            return None
+            
+        self._device = self._omci_agent.get_device(image_dnld_sm.status.id) if self._device is None else self._device
+
+        # if restart:
+        #     self.cancel_upgrade_onu()            
+            
+        if self._omci_upgrade_task is None:
+            img_id = self.__get_standby_image_instance()
+            self.log.debug("start task", image_Id=img_id, task=self._omci_upgrade_sm_cls)
+            self._omci_upgrade_task = self._omci_upgrade_task_cls(img_id, 
+                                                                  self._omci_upgrade_sm_cls, 
+                                                                  self._omci_agent, 
+                                                                  image_dnld_sm.status, clock=self.reactor)
+            self.log.debug("task created but not started")
+            # self._device.task_runner.start()
+            self._omci_upgrade_deferred = self._device.task_runner.queue_task(self._omci_upgrade_task)
+            self._omci_upgrade_deferred.addBoth(self.__clear_task)
+        return self._omci_upgrade_deferred
+
+
+    def cancel_upgrade_onu(self):
+        self.log.debug("cancel_upgrade_onu")
+        if self._omci_upgrade_task is not None:
+            self.log.debug("cancel_upgrade_onu", running=self._omci_upgrade_task.running)
+            # if self._omci_upgrade_task.running:
+            self._omci_upgrade_task.stop()
+            self._omci_upgrade_task = None
+        if self._omci_upgrade_deferred is not None:
+           self.reactor.callLater(0, self._omci_upgrade_deferred.cancel)
+           self._omci_upgrade_deferred = None
+           
+
+    # def activate_onu_image(self, image_name):
+    #     self.log.debug("activate_onu_image", image=image_name)
+    #     img_dnld = self.get_image_status(image_name)
+    #     if img_dnld is None:
+    #         return None
+            
+    #     img_dnld.image_state = ImageDownload.IMAGE_INACTIVE    
+    #     if self._omci_activate_img_sm is None:
+    #         self._omci_activate_img_sm = self._omci_activate_img_sm_cls(self._omci_agent, self._device_id,
+    #                                                                     self.__get_standby_image_instance(), 
+    #                                                                     img_dnld, clock=self.reactor)
+    #         return self._omci_activate_img_sm.start()
+    #     else:
+    #         return None
+            
+    def onu_bootup(self):
+        if self._omci_upgrade_task is not None:
+            self._omci_upgrade_task.onu_bootup()
+
+    def get_image_status(self, image_name):
+        """
+          Return (ImageDownload)
+        """
+        sm = self._images.get(image_name)
+        return sm.status if sm is not None else None
+    
diff --git a/python/extensions/omci/state_machines/mib_sync.py b/python/extensions/omci/state_machines/mib_sync.py
new file mode 100644
index 0000000..2a8b535
--- /dev/null
+++ b/python/extensions/omci/state_machines/mib_sync.py
@@ -0,0 +1,934 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from datetime import datetime, timedelta
+from transitions import Machine
+from twisted.internet import reactor
+from voltha.extensions.omci.omci_frame import OmciFrame
+from voltha.extensions.omci.database.mib_db_api import MDS_KEY
+from voltha.extensions.omci.omci_defs import EntityOperations, ReasonCodes, \
+    AttributeAccess
+from voltha.extensions.omci.omci_cc import OmciCCRxEvents, OMCI_CC, TX_REQUEST_KEY, \
+    RX_RESPONSE_KEY
+from voltha.extensions.omci.onu_device_entry import OnuDeviceEvents, OnuDeviceEntry, \
+    SUPPORTED_MESSAGE_ENTITY_KEY, SUPPORTED_MESSAGE_TYPES_KEY
+from voltha.extensions.omci.omci_entities import OntData
+from common.event_bus import EventBusClient
+from voltha.protos.omci_mib_db_pb2 import OpenOmciEventType
+
+RxEvent = OmciCCRxEvents
+DevEvent = OnuDeviceEvents
+OP = EntityOperations
+RC = ReasonCodes
+AA = AttributeAccess
+
+
+class MibSynchronizer(object):
+    """
+    OpenOMCI MIB Synchronizer state machine
+    """
+    DEFAULT_STATES = ['disabled', 'starting', 'uploading', 'examining_mds',
+                      'in_sync', 'out_of_sync', 'auditing', 'resynchronizing']
+
+    DEFAULT_TRANSITIONS = [
+        {'trigger': 'start', 'source': 'disabled', 'dest': 'starting'},
+
+        {'trigger': 'upload_mib', 'source': 'starting', 'dest': 'uploading'},
+        {'trigger': 'examine_mds', 'source': 'starting', 'dest': 'examining_mds'},
+
+        {'trigger': 'success', 'source': 'uploading', 'dest': 'in_sync'},
+
+        {'trigger': 'success', 'source': 'examining_mds', 'dest': 'in_sync'},
+        {'trigger': 'mismatch', 'source': 'examining_mds', 'dest': 'resynchronizing'},
+
+        {'trigger': 'audit_mib', 'source': 'in_sync', 'dest': 'auditing'},
+
+        {'trigger': 'success', 'source': 'out_of_sync', 'dest': 'in_sync'},
+        {'trigger': 'audit_mib', 'source': 'out_of_sync', 'dest': 'auditing'},
+
+        {'trigger': 'success', 'source': 'auditing', 'dest': 'in_sync'},
+        {'trigger': 'mismatch', 'source': 'auditing', 'dest': 'resynchronizing'},
+        {'trigger': 'force_resync', 'source': 'auditing', 'dest': 'resynchronizing'},
+
+        {'trigger': 'success', 'source': 'resynchronizing', 'dest': 'in_sync'},
+        {'trigger': 'diffs_found', 'source': 'resynchronizing', 'dest': 'out_of_sync'},
+
+        # Do wildcard 'timeout' trigger that sends us back to start
+        {'trigger': 'timeout', 'source': '*', 'dest': 'starting'},
+
+        # Do wildcard 'stop' trigger last so it covers all previous states
+        {'trigger': 'stop', 'source': '*', 'dest': 'disabled'},
+    ]
+    DEFAULT_TIMEOUT_RETRY = 5      # Seconds to delay after task failure/timeout
+    DEFAULT_AUDIT_DELAY = 60       # Periodic tick to audit the MIB Data Sync
+    DEFAULT_RESYNC_DELAY = 300     # Periodically force a resync
+
+    def __init__(self, agent, device_id, mib_sync_tasks, db,
+                 advertise_events=False,
+                 states=DEFAULT_STATES,
+                 transitions=DEFAULT_TRANSITIONS,
+                 initial_state='disabled',
+                 timeout_delay=DEFAULT_TIMEOUT_RETRY,
+                 audit_delay=DEFAULT_AUDIT_DELAY,
+                 resync_delay=DEFAULT_RESYNC_DELAY):
+        """
+        Class initialization
+
+        :param agent: (OpenOmciAgent) Agent
+        :param device_id: (str) ONU Device ID
+        :param db: (MibDbVolatileDict) MIB Database
+        :param advertise_events: (bool) Advertise events on OpenOMCI Event Bus
+        :param mib_sync_tasks: (dict) Tasks to run
+        :param states: (list) List of valid states
+        :param transitions: (dict) Dictionary of triggers and state changes
+        :param initial_state: (str) Initial state machine state
+        :param timeout_delay: (int/float) Number of seconds after a timeout to attempt
+                                          a retry (goes back to starting state)
+        :param audit_delay: (int) Seconds between MIB audits while in sync. Set to
+                                  zero to disable audit. An operator can request
+                                  an audit manually by calling 'self.audit_mib'
+        :param resync_delay: (int) Seconds in sync before performing a forced MIB
+                                   resynchronization
+        """
+        self.log = structlog.get_logger(device_id=device_id)
+
+        self._agent = agent
+        self._device_id = device_id
+        self._device = None
+        self._database = db
+        self._timeout_delay = timeout_delay
+        self._audit_delay = audit_delay
+        self._resync_delay = resync_delay
+
+        self._upload_task = mib_sync_tasks['mib-upload']
+        self._get_mds_task = mib_sync_tasks['get-mds']
+        self._audit_task = mib_sync_tasks['mib-audit']
+        self._resync_task = mib_sync_tasks['mib-resync']
+        self._reconcile_task = mib_sync_tasks['mib-reconcile']
+        self._advertise_events = advertise_events
+
+        self._deferred = None
+        self._current_task = None  # TODO: Support multiple running tasks after v.2.0 release
+        self._task_deferred = None
+        self._mib_data_sync = 0
+        self._last_mib_db_sync_value = None
+        self._device_in_db = False
+        self._next_resync = None
+
+        self._on_olt_only_diffs = None
+        self._on_onu_only_diffs = None
+        self._attr_diffs = None
+        self._audited_olt_db = None
+        self._audited_onu_db = None
+
+        self._event_bus = EventBusClient()
+        self._omci_cc_subscriptions = {               # RxEvent.enum -> Subscription Object
+            RxEvent.MIB_Reset: None,
+            RxEvent.AVC_Notification: None,
+            RxEvent.MIB_Upload: None,
+            RxEvent.MIB_Upload_Next: None,
+            RxEvent.Create: None,
+            RxEvent.Delete: None,
+            RxEvent.Set: None,
+        }
+        self._omci_cc_sub_mapping = {
+            RxEvent.MIB_Reset: self.on_mib_reset_response,
+            RxEvent.AVC_Notification: self.on_avc_notification,
+            RxEvent.MIB_Upload: self.on_mib_upload_response,
+            RxEvent.MIB_Upload_Next: self.on_mib_upload_next_response,
+            RxEvent.Create: self.on_create_response,
+            RxEvent.Delete: self.on_delete_response,
+            RxEvent.Set: self.on_set_response,
+        }
+        self._onu_dev_subscriptions = {               # DevEvent.enum -> Subscription Object
+            DevEvent.OmciCapabilitiesEvent: None
+        }
+        self._onu_dev_sub_mapping = {
+            DevEvent.OmciCapabilitiesEvent: self.on_capabilities_event
+        }
+
+        # Statistics and attributes
+        # TODO: add any others if it will support problem diagnosis
+
+        # Set up state machine to manage states
+        self.machine = Machine(model=self, states=states,
+                               transitions=transitions,
+                               initial=initial_state,
+                               queued=True,
+                               name='{}-{}'.format(self.__class__.__name__,
+                                                   device_id))
+        try:
+            import logging
+            logging.getLogger('transitions').setLevel(logging.WARNING)
+        except Exception as e:
+            self.log.exception('log-level-failed', e=e)
+
+    def _cancel_deferred(self):
+        d1, self._deferred = self._deferred, None
+        d2, self._task_deferred = self._task_deferred, None
+
+        for d in [d1, d1]:
+            try:
+                if d is not None and not d.called:
+                    d.cancel()
+            except:
+                pass
+
+    def __str__(self):
+        return 'MIBSynchronizer: Device ID: {}, State:{}'.format(self._device_id, self.state)
+
+    def delete(self):
+        """
+        Cleanup any state information
+        """
+        self.stop()
+        db, self._database = self._database, None
+
+        if db is not None:
+            db.remove(self._device_id)
+
+    @property
+    def device_id(self):
+        return self._device_id
+
+    @property
+    def mib_data_sync(self):
+        return self._mib_data_sync
+
+    def increment_mib_data_sync(self):
+        self._mib_data_sync += 1
+        if self._mib_data_sync > 255:
+            self._mib_data_sync = 0
+
+        if self._database is not None:
+            self._database.save_mib_data_sync(self._device_id,
+                                              self._mib_data_sync)
+
+    @property
+    def last_mib_db_sync(self):
+        return self._last_mib_db_sync_value
+
+    @last_mib_db_sync.setter
+    def last_mib_db_sync(self, value):
+        self._last_mib_db_sync_value = value
+        if self._database is not None:
+            self._database.save_last_sync(self.device_id, value)
+
+    @property
+    def is_new_onu(self):
+        """
+        Is this a new ONU (has never completed MIB synchronization)
+        :return: (bool) True if this ONU should be considered new
+        """
+        return self.last_mib_db_sync is None
+
+    @property
+    def advertise_events(self):
+        return self._advertise_events
+
+    @advertise_events.setter
+    def advertise_events(self, value):
+        if not isinstance(value, bool):
+            raise TypeError('Advertise event is a boolean')
+        self._advertise_events = value
+
+    def advertise(self, event, info):
+        """Advertise an event on the OpenOMCI event bus"""
+        if self._advertise_events:
+            self._agent.advertise(event,
+                                  {
+                                      'state-machine': self.machine.name,
+                                      'info': info,
+                                      'time': str(datetime.utcnow())
+                                  })
+
+    def on_enter_disabled(self):
+        """
+        State machine is being stopped
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        self._cancel_deferred()
+        if self._device is not None:
+            self._device.mib_db_in_sync = False
+
+        task, self._current_task = self._current_task, None
+        if task is not None:
+            task.stop()
+
+        # Drop Response and Autonomous notification subscriptions
+        for event, sub in self._omci_cc_subscriptions.iteritems():
+            if sub is not None:
+                self._omci_cc_subscriptions[event] = None
+                self._device.omci_cc.event_bus.unsubscribe(sub)
+
+        for event, sub in self._onu_dev_subscriptions.iteritems():
+            if sub is not None:
+                self._onu_dev_subscriptions[event] = None
+                self._device.event_bus.unsubscribe(sub)
+
+        # TODO: Stop and remove any currently running or scheduled tasks
+        # TODO: Anything else?
+
+    def _seed_database(self):
+        if not self._device_in_db:
+            try:
+                try:
+                    self._database.start()
+                    self._database.add(self._device_id)
+                    self.log.debug('seed-db-does-not-exist', device_id=self._device_id)
+
+                except KeyError:
+                    # Device already is in database
+                    self.log.debug('seed-db-exist', device_id=self._device_id)
+                    self._mib_data_sync = self._database.get_mib_data_sync(self._device_id)
+                    self._last_mib_db_sync_value = self._database.get_last_sync(self._device_id)
+
+                self._device_in_db = True
+
+            except Exception as e:
+                self.log.exception('seed-database-failure', e=e)
+
+    def on_enter_starting(self):
+        """
+        Determine ONU status and start/re-start MIB Synchronization tasks
+        """
+        self._device = self._agent.get_device(self._device_id)
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        # Make sure root of external MIB Database exists
+        self._seed_database()
+
+        # Set up Response and Autonomous notification subscriptions
+        try:
+            for event, sub in self._omci_cc_sub_mapping.iteritems():
+                if self._omci_cc_subscriptions[event] is None:
+                    self._omci_cc_subscriptions[event] = \
+                        self._device.omci_cc.event_bus.subscribe(
+                            topic=OMCI_CC.event_bus_topic(self._device_id, event),
+                            callback=sub)
+
+        except Exception as e:
+            self.log.exception('omci-cc-subscription-setup', e=e)
+
+        # Set up ONU device subscriptions
+        try:
+            for event, sub in self._onu_dev_sub_mapping.iteritems():
+                if self._onu_dev_subscriptions[event] is None:
+                    self._onu_dev_subscriptions[event] = \
+                        self._device.event_bus.subscribe(
+                                topic=OnuDeviceEntry.event_bus_topic(self._device_id, event),
+                                callback=sub)
+
+        except Exception as e:
+            self.log.exception('dev-subscription-setup', e=e)
+
+        # Clear any previous audit results
+        self._on_olt_only_diffs = None
+        self._on_onu_only_diffs = None
+        self._attr_diffs = None
+        self._audited_olt_db = None
+        self._audited_onu_db = None
+
+        # Determine if this ONU has ever synchronized
+        if self.is_new_onu:
+            # Start full MIB upload
+            self._deferred = reactor.callLater(0, self.upload_mib)
+
+        else:
+            # Examine the MIB Data Sync
+            self._deferred = reactor.callLater(0, self.examine_mds)
+
+    def on_enter_uploading(self):
+        """
+        Begin full MIB data upload, starting with a MIB RESET
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        def success(results):
+            self.log.debug('mib-upload-success', results=results)
+            self._current_task = None
+            self._next_resync = datetime.utcnow() + timedelta(seconds=self._resync_delay)
+            self._deferred = reactor.callLater(0, self.success)
+
+        def failure(reason):
+            self.log.info('mib-upload-failure', reason=reason)
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.timeout)
+
+        self._device.mib_db_in_sync = False
+        self._current_task = self._upload_task(self._agent, self._device_id)
+
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_examining_mds(self):
+        """
+        Create a simple task to fetch the MIB Data Sync value and
+        determine if the ONU value matches what is in the MIB database
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        self._mib_data_sync = self._database.get_mib_data_sync(self._device_id) or 0
+
+        def success(onu_mds_value):
+            self.log.debug('examine-mds-success', onu_mds_value=onu_mds_value, olt_mds_value=self.mib_data_sync)
+            self._current_task = None
+
+            # Examine MDS value
+            if self.mib_data_sync == onu_mds_value:
+                self._next_resync = datetime.utcnow() + timedelta(seconds=self._resync_delay)
+                self._deferred = reactor.callLater(0, self.success)
+            else:
+                self._deferred = reactor.callLater(0, self.mismatch)
+
+        def failure(reason):
+            self.log.info('examine-mds-failure', reason=reason)
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.timeout)
+
+        self._device.mib_db_in_sync = False
+        self._current_task = self._get_mds_task(self._agent, self._device_id)
+
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_in_sync(self):
+        """
+        The OLT/OpenOMCI MIB Database is in sync with the ONU MIB Database.
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self.last_mib_db_sync = datetime.utcnow()
+        self._device.mib_db_in_sync = True
+
+        if self._audit_delay > 0:
+            self._deferred = reactor.callLater(self._audit_delay, self.audit_mib)
+
+    def on_enter_out_of_sync(self):
+        """
+        The MIB in OpenOMCI and the ONU are out of sync.  This can happen if:
+
+           o the MIB_Data_Sync values are not equal, or
+           o the MIBs were compared and differences were found.
+
+        Schedule a task to reconcile the differences
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        # We are only out-of-sync if there were differences.  If here due to MDS
+        # value differences, still run the reconcile so we up date the ONU's MDS
+        # value to match ours.
+
+        self._device.mib_db_in_sync = self._attr_diffs is None and \
+                                      self._on_onu_only_diffs is None and \
+                                      self._on_olt_only_diffs is None
+
+        def success(onu_mds_value):
+            self.log.debug('reconcile-success', mds_value=onu_mds_value)
+            self._current_task = None
+            self._next_resync = datetime.utcnow() + timedelta(seconds=self._resync_delay)
+            self._deferred = reactor.callLater(0, self.success)
+
+        def failure(reason):
+            self.log.info('reconcile-failure', reason=reason)
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.timeout)
+
+        diff_collection = {
+            'onu-only': self._on_onu_only_diffs,
+            'olt-only': self._on_olt_only_diffs,
+            'attributes': self._attr_diffs,
+            'olt-db': self._audited_olt_db,
+            'onu-db': self._audited_onu_db
+        }
+        # Clear out results since reconciliation task will be handling them
+        self._on_olt_only_diffs = None
+        self._on_onu_only_diffs = None
+        self._attr_diffs = None
+        self._audited_olt_db = None
+        self._audited_onu_db = None
+
+        self._current_task = self._reconcile_task(self._agent, self._device_id, diff_collection)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_auditing(self):
+        """
+        Perform a MIB Audit.  If our last MIB resync was too long in the
+        past, perform a resynchronization anyway
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        if self._next_resync is None:
+            self.log.error('next-forced-resync-error', msg='Next Resync should always be valid at this point')
+            self._deferred = reactor.callLater(self._timeout_delay, self.timeout)
+
+        if datetime.utcnow() >= self._next_resync:
+            self._deferred = reactor.callLater(0, self.force_resync)
+        else:
+            def success(onu_mds_value):
+                self.log.debug('audit-success', onu_mds_value=onu_mds_value, olt_mds_value=self.mib_data_sync)
+                self._current_task = None
+
+                # Examine MDS value
+                if self.mib_data_sync == onu_mds_value:
+                    self._deferred = reactor.callLater(0, self.success)
+                else:
+                    self._device.mib_db_in_sync = False
+                    self._deferred = reactor.callLater(0, self.mismatch)
+
+            def failure(reason):
+                self.log.info('audit-failure', reason=reason)
+                self._current_task = None
+                self._deferred = reactor.callLater(self._timeout_delay, self.timeout)
+
+            self._current_task = self._audit_task(self._agent, self._device_id)
+            self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+            self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_resynchronizing(self):
+        """
+        Perform a resynchronization of the MIB database
+
+        First calculate any differences
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        def success(results):
+            self.log.debug('resync-success', results=results)
+
+            on_olt_only = results.get('on-olt-only')
+            on_onu_only = results.get('on-onu-only')
+            attr_diffs = results.get('attr-diffs')
+            olt_db = results.get('olt-db')
+            onu_db = results.get('onu-db')
+
+            self._current_task = None
+            self._on_olt_only_diffs = on_olt_only if on_olt_only and len(on_olt_only) else None
+            self._on_onu_only_diffs = on_onu_only if on_onu_only and len(on_onu_only) else None
+            self._attr_diffs = attr_diffs if attr_diffs and len(attr_diffs) else None
+            self._audited_olt_db = olt_db
+            self._audited_onu_db = onu_db
+
+            mds_equal = self.mib_data_sync == self._audited_onu_db[MDS_KEY]
+
+            if mds_equal and all(diff is None for diff in [self._on_olt_only_diffs,
+                                                           self._on_onu_only_diffs,
+                                                           self._attr_diffs]):
+                self._next_resync = datetime.utcnow() + timedelta(seconds=self._resync_delay)
+                self._deferred = reactor.callLater(0, self.success)
+            else:
+                self._deferred = reactor.callLater(0, self.diffs_found)
+
+        def failure(reason):
+            self.log.info('resync-failure', reason=reason)
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.timeout)
+
+        self._current_task = self._resync_task(self._agent, self._device_id)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_mib_reset_response(self, _topic, msg):
+        """
+        Called upon receipt of a MIB Reset Response for this ONU
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-mib-reset-response', state=self.state)
+        try:
+            response = msg[RX_RESPONSE_KEY]
+
+            # Check if expected in current mib_sync state
+            if self.state != 'uploading' or self._omci_cc_subscriptions[RxEvent.MIB_Reset] is None:
+                self.log.error('rx-in-invalid-state', state=self.state)
+
+            else:
+                now = datetime.utcnow()
+
+                if not isinstance(response, OmciFrame):
+                    raise TypeError('Response should be an OmciFrame')
+
+                omci_msg = response.fields['omci_message'].fields
+                status = omci_msg['success_code']
+
+                assert status == RC.Success, 'Unexpected MIB reset response status: {}'. \
+                    format(status)
+
+                self._device.mib_db_in_sync = False
+                self._mib_data_sync = 0
+                self._device._modified = now
+                self._database.on_mib_reset(self._device_id)
+
+        except KeyError:
+            pass            # NOP
+
+    def on_avc_notification(self, _topic, msg):
+        """
+        Process an Attribute Value Change Notification
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-avc-notification', state=self.state)
+
+        if self._omci_cc_subscriptions[RxEvent.AVC_Notification]:
+            try:
+                notification = msg[RX_RESPONSE_KEY]
+
+                if self.state == 'disabled':
+                    self.log.error('rx-in-invalid-state', state=self.state)
+
+                # Inspect the notification
+                omci_msg = notification.fields['omci_message'].fields
+                class_id = omci_msg['entity_class']
+                instance_id = omci_msg['entity_id']
+                data = omci_msg['data']
+                attributes = [data.keys()]
+
+                # Look up ME Instance in Database. Not-found can occur if a MIB
+                # reset has occurred
+                info = self._database.query(self.device_id, class_id, instance_id, attributes)
+                # TODO: Add old/new info to log message
+                self.log.debug('avc-change', class_id=class_id, instance_id=instance_id)
+
+                # Save the changed data to the MIB.
+                self._database.set(self.device_id, class_id, instance_id, data)
+
+                # Autonomous creation and deletion of managed entities do not
+                # result in an increment of the MIB data sync value. However,
+                # AVC's in response to a change by the Operator do incur an
+                # increment of the MIB Data Sync.  If here during uploading,
+                # we issued a MIB-Reset which may generate AVC.  (TODO: Focus testing during hardening)
+                if self.state == 'uploading':
+                    self.increment_mib_data_sync()
+
+            except KeyError:
+                pass            # NOP
+
+    def on_mib_upload_response(self, _topic, msg):
+        """
+        Process a MIB Upload response
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-mib-upload-next-response', state=self.state)
+
+        if self._omci_cc_subscriptions[RxEvent.MIB_Upload]:
+            # Check if expected in current mib_sync state
+            if self.state == 'resynchronizing':
+                # The resync task handles this
+                # TODO: Remove this subscription if we never do anything with the response
+                return
+
+            if self.state != 'uploading':
+                self.log.error('rx-in-invalid-state', state=self.state)
+
+    def on_mib_upload_next_response(self, _topic, msg):
+        """
+        Process a MIB Upload Next response
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-mib-upload-next-response', state=self.state)
+
+        if self._omci_cc_subscriptions[RxEvent.MIB_Upload_Next]:
+            try:
+                if self.state == 'resynchronizing':
+                    # The resync task handles this
+                    return
+
+                # Check if expected in current mib_sync state
+                if self.state != 'uploading':
+                    self.log.error('rx-in-invalid-state', state=self.state)
+
+                else:
+                    response = msg[RX_RESPONSE_KEY]
+
+                    # Extract entity instance information
+                    omci_msg = response.fields['omci_message'].fields
+
+                    class_id = omci_msg['object_entity_class']
+                    entity_id = omci_msg['object_entity_id']
+
+                    # Filter out the 'mib_data_sync' from the database. We save that at
+                    # the device level and do not want it showing up during a re-sync
+                    # during data compares
+
+                    if class_id == OntData.class_id:
+                        return
+
+                    attributes = {k: v for k, v in omci_msg['object_data'].items()}
+
+                    # Save to the database
+                    self._database.set(self._device_id, class_id, entity_id, attributes)
+
+            except KeyError:
+                pass            # NOP
+            except Exception as e:
+                self.log.exception('upload-next', e=e)
+
+    def on_create_response(self, _topic, msg):
+        """
+        Process a Set response
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-create-response', state=self.state)
+
+        if self._omci_cc_subscriptions[RxEvent.Create]:
+            if self.state in ['disabled', 'uploading']:
+                self.log.error('rx-in-invalid-state', state=self.state)
+                return
+            try:
+                request = msg[TX_REQUEST_KEY]
+                response = msg[RX_RESPONSE_KEY]
+                status = response.fields['omci_message'].fields['success_code']
+
+                if status != RC.Success and status != RC.InstanceExists:
+                    # TODO: Support offline ONTs in post VOLTHA v1.3.0
+                    omci_msg = response.fields['omci_message']
+                    self.log.warn('set-response-failure',
+                                  class_id=omci_msg.fields['entity_class'],
+                                  instance_id=omci_msg.fields['entity_id'],
+                                  status=omci_msg.fields['success_code'],
+                                  status_text=self._status_to_text(omci_msg.fields['success_code']),
+                                  parameter_error_attributes_mask=omci_msg.fields['parameter_error_attributes_mask'])
+                else:
+                    omci_msg = request.fields['omci_message'].fields
+                    class_id = omci_msg['entity_class']
+                    entity_id = omci_msg['entity_id']
+                    attributes = {k: v for k, v in omci_msg['data'].items()}
+
+                    # Save to the database
+                    created = self._database.set(self._device_id, class_id, entity_id, attributes)
+
+                    if created:
+                        self.increment_mib_data_sync()
+
+                    # If the ME contains set-by-create or writeable values that were
+                    # not specified in the create command, the ONU will have
+                    # initialized those fields
+
+                    if class_id in self._device.me_map:
+                        sbc_w_set = {attr.field.name for attr in self._device.me_map[class_id].attributes
+                                     if (AA.SBC in attr.access or AA.W in attr.access)
+                                     and attr.field.name != 'managed_entity_id'}
+
+                        missing = sbc_w_set - {k for k in attributes.iterkeys()}
+
+                        if len(missing):
+                            # Request the missing attributes
+                            self.update_sbc_w_items(class_id, entity_id, missing)
+
+            except KeyError as e:
+                pass            # NOP
+
+            except Exception as e:
+                self.log.exception('create', e=e)
+
+    def update_sbc_w_items(self, class_id, entity_id, missing_attributes):
+        """
+        Perform a get-request for Set-By-Create (SBC) or writable (w) attributes
+        that were not specified in the original Create request.
+
+        :param class_id: (int) Class ID
+        :param entity_id: (int) Instance ID
+        :param missing_attributes: (set) Missing SBC or Writable attribute
+        """
+        if len(missing_attributes) and class_id in self._device.me_map:
+            from voltha.extensions.omci.tasks.omci_get_request import OmciGetRequest
+
+            def success(results):
+                self._database.set(self._device_id, class_id, entity_id, results.attributes)
+
+            def failure(reason):
+                self.log.warn('update-sbc-w-failed', reason=reason, class_id=class_id,
+                              entity_id=entity_id, attributes=missing_attributes)
+
+            d = self._device.task_runner.queue_task(OmciGetRequest(self._agent, self._device_id,
+                                                                   self._device.me_map[class_id],
+                                                                   entity_id, missing_attributes,
+                                                                   allow_failure=True))
+            d.addCallbacks(success, failure)
+
+    def on_delete_response(self, _topic, msg):
+        """
+        Process a Delete response
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-delete-response', state=self.state)
+
+        if self._omci_cc_subscriptions[RxEvent.Delete]:
+            if self.state in ['disabled', 'uploading']:
+                self.log.error('rx-in-invalid-state', state=self.state)
+                return
+            try:
+                request = msg[TX_REQUEST_KEY]
+                response = msg[RX_RESPONSE_KEY]
+
+                if response.fields['omci_message'].fields['success_code'] != RC.Success:
+                    # TODO: Support offline ONTs in post VOLTHA v1.3.0
+                    omci_msg = response.fields['omci_message']
+                    self.log.warn('set-response-failure',
+                                  class_id=omci_msg.fields['entity_class'],
+                                  instance_id=omci_msg.fields['entity_id'],
+                                  status=omci_msg.fields['success_code'],
+                                  status_text=self._status_to_text(omci_msg.fields['success_code']))
+                else:
+                    omci_msg = request.fields['omci_message'].fields
+                    class_id = omci_msg['entity_class']
+                    entity_id = omci_msg['entity_id']
+
+                    # Remove from the database
+                    deleted = self._database.delete(self._device_id, class_id, entity_id)
+
+                    if deleted:
+                        self.increment_mib_data_sync()
+
+            except KeyError as e:
+                pass            # NOP
+            except Exception as e:
+                self.log.exception('delete', e=e)
+
+    def on_set_response(self, _topic, msg):
+        """
+        Process a Set response
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-set-response', state=self.state)
+
+        if self._omci_cc_subscriptions[RxEvent.Set]:
+            if self.state in ['disabled', 'uploading']:
+                self.log.error('rx-in-invalid-state', state=self.state)
+            try:
+                request = msg[TX_REQUEST_KEY]
+                response = msg[RX_RESPONSE_KEY]
+
+                if response.fields['omci_message'].fields['success_code'] != RC.Success:
+                    # TODO: Support offline ONTs in post VOLTHA v1.3.0
+                    omci_msg = response.fields['omci_message']
+                    self.log.warn('set-response-failure',
+                                  class_id=omci_msg.fields['entity_class'],
+                                  instance_id=omci_msg.fields['entity_id'],
+                                  status=omci_msg.fields['success_code'],
+                                  status_text=self._status_to_text(omci_msg.fields['success_code']),
+                                  unsupported_attribute_mask=omci_msg.fields['unsupported_attributes_mask'],
+                                  failed_attribute_mask=omci_msg.fields['failed_attributes_mask'])
+                else:
+                    omci_msg = request.fields['omci_message'].fields
+                    class_id = omci_msg['entity_class']
+                    entity_id = omci_msg['entity_id']
+                    attributes = {k: v for k, v in omci_msg['data'].items()}
+
+                    # Save to the database (Do not save 'sets' of the mib-data-sync however)
+                    if class_id != OntData.class_id:
+                        modified = self._database.set(self._device_id, class_id, entity_id, attributes)
+                        if modified:
+                            self.increment_mib_data_sync()
+
+            except KeyError as _e:
+                pass            # NOP
+            except Exception as e:
+                self.log.exception('set', e=e)
+    def on_capabilities_event(self, _topic, msg):
+        """
+        Process a OMCI capabilties event
+        :param _topic: (str) OnuDeviceEntry Capabilities event
+        :param msg: (dict) Message Entities & Message Types supported
+        """
+        self._database.update_supported_managed_entities(self.device_id,
+                                                         msg[SUPPORTED_MESSAGE_ENTITY_KEY])
+        self._database.update_supported_message_types(self.device_id,
+                                                      msg[SUPPORTED_MESSAGE_TYPES_KEY])
+
+    def _status_to_text(self, success_code):
+        return {
+                RC.Success: "Success",
+                RC.ProcessingError: "Processing Error",
+                RC.NotSupported: "Not Supported",
+                RC.ParameterError: "Paremeter Error",
+                RC.UnknownEntity: "Unknown Entity",
+                RC.UnknownInstance: "Unknown Instance",
+                RC.DeviceBusy: "Device Busy",
+                RC.InstanceExists: "Instance Exists"
+            }.get(success_code, 'Unknown status code: {}'.format(success_code))
+
+    def query_mib(self, class_id=None, instance_id=None, attributes=None):
+        """
+        Get MIB database information.
+
+        This method can be used to request information from the database to the detailed
+        level requested
+
+        :param class_id:  (int) Managed Entity class ID
+        :param instance_id: (int) Managed Entity instance
+        :param attributes: (list or str) Managed Entity instance's attributes
+
+        :return: (dict) The value(s) requested. If class/inst/attribute is
+                        not found, an empty dictionary is returned
+        :raises DatabaseStateError: If the database is not enabled or does not exist
+        """
+        from voltha.extensions.omci.database.mib_db_api import DatabaseStateError
+
+        self.log.debug('query', class_id=class_id,
+                       instance_id=instance_id, attributes=attributes)
+        if self._database is None:
+            raise DatabaseStateError('Database does not yet exist')
+
+        return self._database.query(self._device_id, class_id=class_id,
+                                    instance_id=instance_id,
+                                    attributes=attributes)
+
+    def mib_set(self, class_id, entity_id, attributes):
+        """
+        Set attributes of an existing ME Class instance
+
+        This method is primarily used by other state machines to save ME specific
+        information to the persistent database. Access by objects external to the
+        OpenOMCI library is discouraged.
+
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Class entity ID
+        :param attributes: (dict) attribute -> value pairs to set
+        """
+        # It must exist first (but attributes can be new)
+        if isinstance(attributes, dict) and len(attributes) and\
+                self.query_mib(class_id, entity_id) is not None:
+            self._database.set(self._device_id, class_id, entity_id, attributes)
+
+    def mib_delete(self, class_id, entity_id):
+        """
+        Delete an existing ME Class instance
+
+        This method is primarily used by other state machines to delete an ME
+        from the MIB database
+
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME Class entity ID
+
+        :raises KeyError: If device does not exist
+        :raises DatabaseStateError: If the database is not enabled
+        """
+        self._database.delete(self._device_id, class_id, entity_id)
diff --git a/python/extensions/omci/state_machines/omci_onu_capabilities.py b/python/extensions/omci/state_machines/omci_onu_capabilities.py
new file mode 100644
index 0000000..c13739e
--- /dev/null
+++ b/python/extensions/omci/state_machines/omci_onu_capabilities.py
@@ -0,0 +1,262 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from transitions import Machine
+from twisted.internet import reactor
+from voltha.extensions.omci.onu_device_entry import OnuDeviceEntry, OnuDeviceEvents, IN_SYNC_KEY
+from voltha.protos.omci_mib_db_pb2 import OpenOmciEventType
+
+
+class OnuOmciCapabilities(object):
+    """
+    OpenOMCI ONU OMCI Capabilities State machine
+    """
+    DEFAULT_STATES = ['disabled', 'out_of_sync', 'in_sync', 'idle']
+
+    DEFAULT_TRANSITIONS = [
+        {'trigger': 'start', 'source': 'disabled', 'dest': 'out_of_sync'},
+        {'trigger': 'synchronized', 'source': 'out_of_sync', 'dest': 'in_sync'},
+
+        {'trigger': 'success', 'source': 'in_sync', 'dest': 'idle'},
+        {'trigger': 'failure', 'source': 'in_sync', 'dest': 'out_of_sync'},
+
+        {'trigger': 'not_synchronized', 'source': 'idle', 'dest': 'out_of_sync'},
+
+        # Do wildcard 'stop' trigger last so it covers all previous states
+        {'trigger': 'stop', 'source': '*', 'dest': 'disabled'},
+    ]
+    DEFAULT_RETRY = 10      # Seconds to delay after task failure/timeout/poll
+
+    def __init__(self, agent, device_id, tasks,
+                 advertise_events=False,
+                 states=DEFAULT_STATES,
+                 transitions=DEFAULT_TRANSITIONS,
+                 initial_state='disabled',
+                 timeout_delay=DEFAULT_RETRY):
+        """
+        Class initialization
+
+        :param agent: (OpenOmciAgent) Agent
+        :param device_id: (str) ONU Device ID
+        :param tasks: (dict) Tasks to run
+        :param advertise_events: (bool) Advertise events on OpenOMCI Event Bus
+        :param states: (list) List of valid states
+        :param transitions: (dict) Dictionary of triggers and state changes
+        :param initial_state: (str) Initial state machine state
+        :param timeout_delay: (int/float) Number of seconds after a timeout or poll
+        """
+        self.log = structlog.get_logger(device_id=device_id)
+
+        self._agent = agent
+        self._device_id = device_id
+        self._device = None
+        self._timeout_delay = timeout_delay
+
+        self._get_capabilities_task = tasks['get-capabilities']
+        self._advertise_events = advertise_events
+
+        self._deferred = None
+        self._current_task = None
+        self._task_deferred = None
+        self._supported_entities = frozenset()
+        self._supported_msg_types = frozenset()
+
+        self._subscriptions = {               # RxEvent.enum -> Subscription Object
+            OnuDeviceEvents.MibDatabaseSyncEvent: None
+        }
+        self._sub_mapping = {
+            OnuDeviceEvents.MibDatabaseSyncEvent: self.on_mib_sync_event
+        }
+        # Statistics and attributes
+        # TODO: add any others if it will support problem diagnosis
+
+        # Set up state machine to manage states
+        self.machine = Machine(model=self, states=states,
+                               transitions=transitions,
+                               initial=initial_state,
+                               queued=True,
+                               name='{}-{}'.format(self.__class__.__name__,
+                                                   device_id))
+
+    def _cancel_deferred(self):
+        d1, self._deferred = self._deferred, None
+        d2, self._task_deferred = self._task_deferred, None
+
+        for d in [d1, d2]:
+            try:
+                if d is not None and not d.called:
+                    d.cancel()
+            except:
+                pass
+
+    def _cancel_tasks(self):
+        task, self._current_task = self._current_task, None
+        if task is not None:
+            task.stop()
+
+    def __str__(self):
+        return 'OnuOmciCapabilities: Device ID: {}, State:{}'.format(self._device_id, self.state)
+
+    def delete(self):
+        """
+        Cleanup any state information
+        """
+        self.stop()
+
+    @property
+    def device_id(self):
+        return self._device_id
+
+    @property
+    def supported_managed_entities(self):
+        """
+        Return a set of the Managed Entity class IDs supported on this ONU
+        None is returned if no MEs have been discovered
+
+        :return: (set of ints)
+        """
+        return self._supported_entities if len(self._supported_entities) else None
+
+    @property
+    def supported_message_types(self):
+        """
+        Return a set of the Message Types supported on this ONU
+        None is returned if no message types have been discovered
+
+        :return: (set of EntityOperations)
+        """
+        return self._supported_msg_types if len(self._supported_msg_types) else None
+
+    @property
+    def advertise_events(self):
+        return self._advertise_events
+
+    @advertise_events.setter
+    def advertise_events(self, value):
+        if not isinstance(value, bool):
+            raise TypeError('Advertise event is a boolean')
+        self._advertise_events = value
+
+    def advertise(self, event, info):
+        """Advertise an event on the OpenOMCI event bus"""
+        from datetime import datetime
+
+        if self._advertise_events:
+            self._agent.advertise(event,
+                                  {
+                                      'state-machine': self.machine.name,
+                                      'info': info,
+                                      'time': str(datetime.utcnow())
+                                  })
+
+    def on_enter_disabled(self):
+        """
+        State machine is being stopped
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._cancel_tasks()
+
+        self._supported_entities = frozenset()
+        self._supported_msg_types = frozenset()
+
+        # Drop Response and Autonomous notification subscriptions
+        for event, sub in self._subscriptions.iteritems():
+            if sub is not None:
+                self._subscriptions[event] = None
+                self._device.event_bus.unsubscribe(sub)
+
+    def on_enter_out_of_sync(self):
+        """
+        State machine has just started or the MIB database has transitioned
+        to an out-of-synchronization state
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._device = self._agent.get_device(self._device_id)
+
+        # Subscribe to events of interest
+        try:
+            for event, sub in self._sub_mapping.iteritems():
+                if self._subscriptions[event] is None:
+                    self._subscriptions[event] = \
+                        self._device.event_bus.subscribe(
+                            topic=OnuDeviceEntry.event_bus_topic(self._device_id,
+                                                                 event),
+                            callback=sub)
+
+        except Exception as e:
+            self.log.exception('subscription-setup', e=e)
+
+        # Periodically check/poll for in-sync in case subscription was missed or
+        # already in sync
+        self._deferred = reactor.callLater(0, self.check_in_sync)
+
+    def check_in_sync(self):
+        if self._device.mib_db_in_sync:
+            self.synchronized()
+        else:
+            self._deferred = reactor.callLater(self._timeout_delay,
+                                               self.check_in_sync)
+
+    def on_enter_in_sync(self):
+        """
+        State machine has just transitioned to an in-synchronization state
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+
+        def success(results):
+            self.log.debug('capabilities-success', results=results)
+            self._supported_entities = self._current_task.supported_managed_entities
+            self._supported_msg_types = self._current_task.supported_message_types
+            self._current_task = None
+            self._deferred = reactor.callLater(0, self.success)
+
+        def failure(reason):
+            self.log.info('capabilities-failure', reason=reason)
+            self._supported_entities = frozenset()
+            self._supported_msg_types = frozenset()
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.failure)
+
+        # Schedule a task to read the ONU's OMCI capabilities
+        self._current_task = self._get_capabilities_task(self._agent, self._device_id)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_idle(self):
+        """
+        Notify any subscribers for a capabilities event and wait until
+        stopped or ONU MIB database goes out of sync
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._device.publish_omci_capabilities_event()
+
+    def on_mib_sync_event(self, _topic, msg):
+        """
+        Handle In-Sync/Out-of-Sync for the MIB database
+        :param _topic: (str) Subscription topic
+        :param msg: (dict) In-Sync event data
+        """
+        if self._subscriptions.get(OnuDeviceEvents.MibDatabaseSyncEvent) is None:
+            return
+
+        if msg[IN_SYNC_KEY]:
+            self.synchronized()
+        else:
+            self.not_synchronized()
diff --git a/python/extensions/omci/state_machines/performance_intervals.py b/python/extensions/omci/state_machines/performance_intervals.py
new file mode 100644
index 0000000..73e145b
--- /dev/null
+++ b/python/extensions/omci/state_machines/performance_intervals.py
@@ -0,0 +1,901 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+import arrow
+from transitions import Machine
+from datetime import datetime, timedelta
+from random import uniform, shuffle
+from twisted.internet import reactor
+from common.utils.indexpool import IndexPool
+from voltha.protos.omci_mib_db_pb2 import OpenOmciEventType
+from voltha.extensions.omci.omci_defs import EntityOperations, ReasonCodes
+from voltha.extensions.omci.omci_cc import OmciCCRxEvents, OMCI_CC, TX_REQUEST_KEY, \
+    RX_RESPONSE_KEY
+from voltha.extensions.omci.database.mib_db_api import ATTRIBUTES_KEY
+from voltha.extensions.omci.tasks.omci_get_request import OmciGetRequest
+from voltha.extensions.omci.omci_entities import MacBridgePortConfigurationData
+from voltha.extensions.omci.omci_entities import EthernetPMMonitoringHistoryData, \
+    FecPerformanceMonitoringHistoryData, \
+    XgPonTcPerformanceMonitoringHistoryData, \
+    XgPonDownstreamPerformanceMonitoringHistoryData, \
+    XgPonUpstreamPerformanceMonitoringHistoryData, \
+    EthernetFrameUpstreamPerformanceMonitoringHistoryData, \
+    EthernetFrameDownstreamPerformanceMonitoringHistoryData, \
+    EthernetFrameExtendedPerformanceMonitoring, \
+    EthernetFrameExtendedPerformanceMonitoring64Bit, AniG
+
+
+RxEvent = OmciCCRxEvents
+OP = EntityOperations
+RC = ReasonCodes
+
+
+class PerformanceIntervals(object):
+    """
+    OpenOMCI ONU Performance Monitoring Intervals State machine
+
+    This state machine focuses on L2 Internet Data Service and Classical
+    PM (for the v2.0 release).
+    """
+    DEFAULT_STATES = ['disabled', 'starting', 'synchronize_time', 'idle', 'create_pm_me',
+                      'collect_data', 'threshold_exceeded']
+
+    DEFAULT_TRANSITIONS = [
+        {'trigger': 'start', 'source': 'disabled', 'dest': 'starting'},
+        {'trigger': 'tick', 'source': 'starting', 'dest': 'synchronize_time'},
+
+        {'trigger': 'success', 'source': 'synchronize_time', 'dest': 'idle'},
+        {'trigger': 'failure', 'source': 'synchronize_time', 'dest': 'synchronize_time'},
+
+        {'trigger': 'tick', 'source': 'idle', 'dest': 'collect_data'},
+        {'trigger': 'add_me', 'source': 'idle', 'dest': 'create_pm_me'},
+        {'trigger': 'delete_me', 'source': 'idle', 'dest': 'delete_pm_me'},
+
+        {'trigger': 'success', 'source': 'create_pm_me', 'dest': 'idle'},
+        {'trigger': 'failure', 'source': 'create_pm_me', 'dest': 'idle'},
+
+        {'trigger': 'success', 'source': 'delete_pm_me', 'dest': 'idle'},
+        {'trigger': 'failure', 'source': 'delete_pm_me', 'dest': 'idle'},
+
+        {'trigger': 'success', 'source': 'collect_data', 'dest': 'idle'},
+        {'trigger': 'failure', 'source': 'collect_data', 'dest': 'idle'},
+
+        # TODO: Add rebooted event transitions to disabled or synchronize_time
+        # TODO: Need to capture Threshold Crossing Alarms appropriately
+
+        # Do wildcard 'stop' trigger last so it covers all previous states
+        {'trigger': 'stop', 'source': '*', 'dest': 'disabled'},
+        {'trigger': 'reboot', 'source': '*', 'dest': 'rebooted'},
+    ]
+    DEFAULT_RETRY = 10               # Seconds to delay after task failure/timeout/poll
+    DEFAULT_TICK_DELAY = 15          # Seconds between checks for collection tick
+    DEFAULT_INTERVAL_SKEW = 10 * 60  # Seconds to skew past interval boundary
+    DEFAULT_COLLECT_ATTEMPTS = 3     # Maximum number of collection fetch attempts
+    DEFAULT_CREATE_ATTEMPTS = 15     # Maximum number of attempts to create a PM Managed Entities
+
+    def __init__(self, agent, device_id, tasks,
+                 advertise_events=False,
+                 states=DEFAULT_STATES,
+                 transitions=DEFAULT_TRANSITIONS,
+                 initial_state='disabled',
+                 timeout_delay=DEFAULT_RETRY,
+                 tick_delay=DEFAULT_TICK_DELAY,
+                 interval_skew=DEFAULT_INTERVAL_SKEW,
+                 collect_attempts=DEFAULT_COLLECT_ATTEMPTS,
+                 create_attempts=DEFAULT_CREATE_ATTEMPTS):
+        """
+        Class initialization
+
+        :param agent: (OpenOmciAgent) Agent
+        :param device_id: (str) ONU Device ID
+        :param tasks: (dict) Tasks to run
+        :param advertise_events: (bool) Advertise events on OpenOMCI Event Bus
+        :param states: (list) List of valid states
+        :param transitions: (dict) Dictionary of triggers and state changes
+        :param initial_state: (str) Initial state machine state
+        :param timeout_delay: (int/float) Number of seconds after a timeout to pause
+        :param tick_delay: (int/float) Collection poll check delay while idle
+        :param interval_skew: (int/float) Seconds to randomly skew the next interval
+                              collection to spread out requests for PM intervals
+        :param collect_attempts: (int) Max requests for a single PM interval before fail
+        :param create_attempts: (int) Max attempts to create PM Managed entities before stopping state machine
+        """
+        self.log = structlog.get_logger(device_id=device_id)
+
+        self._agent = agent
+        self._device_id = device_id
+        self._device = None
+        self._pm_config = None
+        self._timeout_delay = timeout_delay
+        self._tick_delay = tick_delay
+        self._interval_skew = interval_skew
+        self._collect_attempts = collect_attempts
+        self._create_attempts = create_attempts
+
+        self._sync_time_task = tasks['sync-time']
+        self._get_interval_task = tasks['collect-data']
+        self._create_pm_task = tasks['create-pm']
+        self._delete_pm_task = tasks['delete-pm']
+        self._advertise_events = advertise_events
+
+        self._omci_cc_subscriptions = {               # RxEvent.enum -> Subscription Object
+            RxEvent.MIB_Reset: None,
+            RxEvent.Create: None,
+            RxEvent.Delete: None
+        }
+        self._omci_cc_sub_mapping = {
+            RxEvent.MIB_Reset: self.on_mib_reset_response,
+            RxEvent.Create: self.on_create_response,
+            RxEvent.Delete: self.on_delete_response,
+        }
+        self._me_watch_list = {
+            MacBridgePortConfigurationData.class_id: {
+                'create-delete': self.add_remove_enet_frame_pm,
+                'instances': dict()  # BP entity_id -> (PM class_id, PM entity_id)
+            }
+        }
+        self._deferred = None
+        self._task_deferred = None
+        self._current_task = None
+        self._add_me_deferred = None
+        self._delete_me_deferred = None
+        self._next_interval = None
+        self._enet_entity_id = IndexPool(1024, 1)
+        self._add_pm_me_retry = 0
+
+        # (Class ID, Instance ID) -> Collect attempts remaining
+        self._pm_me_collect_retries = dict()
+        self._pm_me_extended_info = dict()
+        self._add_pm_me = dict()        # (pm cid, pm eid) -> (me cid, me eid, upstream)
+        self._del_pm_me = set()
+
+        # Pollable PM items
+        # Note that some items the KPI extracts are not listed below. These are the
+        # administrative states, operational states, and sensed ethernet type. The values
+        # in the MIB database should be accurate for these items.
+
+        self._ani_g_items = ["optical_signal_level", "transmit_optical_level"]
+        self._next_poll_time = datetime.utcnow()
+        self._poll_interval = 60                    # TODO: Fixed at once a minute
+
+        # Statistics and attributes
+        # TODO: add any others if it will support problem diagnosis
+
+        # Set up state machine to manage states
+        self.machine = Machine(model=self, states=states,
+                               transitions=transitions,
+                               initial=initial_state,
+                               queued=True,
+                               ignore_invalid_triggers=True,
+                               name='{}-{}'.format(self.__class__.__name__,
+                                                   device_id))
+        try:
+            import logging
+            logging.getLogger('transitions').setLevel(logging.WARNING)
+        except Exception as e:
+            self.log.exception('log-level-failed', e=e)
+
+
+    def _cancel_deferred(self):
+        d1, self._deferred = self._deferred, None
+        d2, self._task_deferred = self._task_deferred, None
+        d3, self._add_me_deferred = self._add_me_deferred, None
+        d4, self._delete_me_deferred = self._delete_me_deferred, None
+
+        for d in [d1, d2, d3, d4]:
+            try:
+                if d is not None and not d.called:
+                    d.cancel()
+            except:
+                pass
+
+    def _cancel_tasks(self):
+        task, self._current_task = self._current_task, None
+        if task is not None:
+            task.stop()
+
+    def __str__(self):
+        return 'PerformanceIntervals: Device ID: {}, State:{}'.format(self._device_id,
+                                                                      self.state)
+
+    def delete(self):
+        """
+        Cleanup any state information
+        """
+        self.stop()
+
+    @property
+    def device_id(self):
+        return self._device_id
+
+    @property
+    def advertise_events(self):
+        return self._advertise_events
+
+    @advertise_events.setter
+    def advertise_events(self, value):
+        if not isinstance(value, bool):
+            raise TypeError('Advertise event is a boolean')
+        self._advertise_events = value
+
+    def advertise(self, event, info):
+        """Advertise an event on the OpenOMCI event bus"""
+        if self._advertise_events:
+            self._agent.advertise(event,
+                                  {
+                                      'state-machine': self.machine.name,
+                                      'info': info,
+                                      'time': str(datetime.utcnow()),
+                                      'next': str(self._next_interval)
+                                  })
+
+    def set_pm_config(self, pm_config):
+        """
+        Set PM interval configuration
+
+        :param pm_config: (OnuPmIntervalMetrics) PM Interval configuration
+        :return:
+        """
+        self._pm_config = pm_config
+
+    def _me_is_supported(self, class_id):
+        """
+        Check to see if ONU supports this ME
+        :param class_id: (int) ME Class ID
+        :return: (bool) If ME is supported
+        """
+        #
+        supported = self._device.omci_capabilities.supported_managed_entities
+        return class_id in supported if supported is not None else False
+
+    def add_pm_me(self, pm_class_id, pm_entity_id, cid=0, eid=0, upstream=False):
+        """
+        Add a new Performance Monitoring ME.
+
+        The ME ID will be added to an internal list and will be added the next
+        time the idle state is reached. An 'add_pm_me' trigger will be raised in
+        case already in the Idle state.
+
+        :param pm_class_id: (int) ME Class ID (1..0xFFFE)
+        :param pm_entity_id: (int) Instance ID (1..0xFFFE)
+        :param cid: (int) Class ID of entity monitored, may be None
+        :param eid: (int) Instance ID of entity monitored, may be None
+        :param upstream: (bool): Flag indicating if PM is for upstream traffic
+        """
+        if not isinstance(pm_class_id, int):
+            raise TypeError('PM ME Instance ID is an integer')
+        if not 0 < pm_class_id < 0xFFFF:
+            raise ValueError('PM ME Instance ID must be 1..65534')
+
+        # Check to see if ONU supports this ME
+        if not self._me_is_supported(pm_class_id):
+            self.log.warn('unsupported-PM-me', class_id=pm_class_id)
+            return
+
+        key = (pm_class_id, pm_entity_id)
+        entry = (cid, eid, upstream)
+
+        if key not in self._pm_me_collect_retries and key not in self._add_pm_me:
+            self._add_pm_me[key] = entry
+
+            if self._add_me_deferred is None:
+                self._add_me_deferred = reactor.callLater(0, self.add_me)
+
+        if (pm_class_id, pm_entity_id) in self._del_pm_me:
+            self._del_pm_me.remove((pm_class_id, pm_entity_id))
+
+    def delete_pm_me(self, class_id, entity_id):
+        """
+        Remove a new Performance Monitoring ME.
+
+        The ME ID will be added to an internal list and will be removed the next
+        time the idle state is reached. An 'delete_pm_me' trigger will be raised in
+        case already in the Idle state.
+
+        :param class_id: (int) ME Class ID (1..0xFFFE)
+        :param entity_id: (int) Instance ID (1..0xFFFE)
+        """
+        if not isinstance(class_id, int):
+            raise TypeError('PM ME Class ID is an integer')
+        if not 0 < class_id < 0xFFFF:
+            raise ValueError('PM ME Class ID must be 1..65534')
+
+        # Check to see if ONU supports this ME
+        if not self._me_is_supported(class_id):
+            self.log.warn('unsupported-PM-me', class_id=class_id)
+            return
+
+        key = (class_id, entity_id)
+
+        if key in self._pm_me_collect_retries and key not in self._del_pm_me:
+            self._del_pm_me.add(key)
+
+            if self._delete_me_deferred is None:
+                self._delete_me_deferred = reactor.callLater(0, self.delete_me)
+
+        if key in self._add_pm_me:
+            self._add_pm_me.pop(key)
+
+    def on_enter_disabled(self):
+        """
+        State machine is being stopped
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._cancel_tasks()
+        self._next_interval = None
+
+        # Drop OMCI ME Response subscriptions
+        for event, sub in self._omci_cc_subscriptions.iteritems():
+            if sub is not None:
+                self._omci_cc_subscriptions[event] = None
+                self._device.omci_cc.event_bus.unsubscribe(sub)
+
+        # Manually remove ani ANI/PON and UNI PM interval MEs
+        config = self._device.configuration
+        anis = config.ani_g_entities
+        unis = config.uni_g_entities
+
+        if anis is not None:
+            for entity_id in anis.iterkeys():
+                self.delete_pm_me(FecPerformanceMonitoringHistoryData.class_id, entity_id)
+                self.delete_pm_me(XgPonTcPerformanceMonitoringHistoryData.class_id, entity_id)
+                self.delete_pm_me(XgPonDownstreamPerformanceMonitoringHistoryData.class_id, entity_id)
+                self.delete_pm_me(XgPonUpstreamPerformanceMonitoringHistoryData.class_id, entity_id)
+
+        if unis is not None:
+            for entity_id in config.uni_g_entities.iterkeys():
+                self.delete_pm_me(EthernetPMMonitoringHistoryData.class_id, entity_id)
+
+    def on_enter_starting(self):
+        """ Add the PON/ANI and UNI PM intervals"""
+        self.advertise(OpenOmciEventType.state_change, self.state)
+
+        self._device = self._agent.get_device(self._device_id)
+        self._cancel_deferred()
+
+        # Set up OMCI ME Response subscriptions
+        try:
+            for event, sub in self._omci_cc_sub_mapping.iteritems():
+                if self._omci_cc_subscriptions[event] is None:
+                    self._omci_cc_subscriptions[event] = \
+                        self._device.omci_cc.event_bus.subscribe(
+                            topic=OMCI_CC.event_bus_topic(self._device_id, event),
+                            callback=sub)
+
+        except Exception as e:
+            self.log.exception('omci-cc-subscription-setup', e=e)
+
+        try:
+            # Manually start some ANI/PON and UNI PM interval MEs
+            config = self._device.configuration
+            anis = config.ani_g_entities
+            unis = config.uni_g_entities
+
+            if anis is not None:
+                for entity_id in anis.iterkeys():
+                    self.add_pm_me(FecPerformanceMonitoringHistoryData.class_id,
+                                   entity_id)
+                    self.add_pm_me(XgPonTcPerformanceMonitoringHistoryData.class_id,
+                                   entity_id)
+                    self.add_pm_me(XgPonDownstreamPerformanceMonitoringHistoryData.class_id,
+                                   entity_id)
+                    self.add_pm_me(XgPonUpstreamPerformanceMonitoringHistoryData.class_id,
+                                   entity_id)
+
+            if unis is not None:
+                for entity_id in config.uni_g_entities.iterkeys():
+                    self.add_pm_me(EthernetPMMonitoringHistoryData.class_id, entity_id)
+
+            # Look for existing instances of dynamically created ME's that have PM
+            # associated with them and add them now
+            for class_id in self._me_watch_list.iterkeys():
+                instances = {k: v for k, v in
+                             self._device.query_mib(class_id=class_id).items()
+                             if isinstance(k, int)}
+
+                for entity_id, data in instances.items():
+                    method = self._me_watch_list[class_id]['create-delete']
+                    cid, eid = method(None, class_id, entity_id,
+                                      add=True, attributes=data[ATTRIBUTES_KEY])
+                    if cid > 0:
+                        # BP entity_id -> (PM class_id, PM entity_id)
+                        instances = self._me_watch_list[class_id]['instances']
+                        instances[entity_id] = (cid, eid)
+
+        except Exception as e:
+            self.log.exception('pm-me-setup', class_id=class_id, e=e)
+
+        # Got to synchronize_time state
+        self._deferred = reactor.callLater(0, self.tick)
+
+    def on_enter_synchronize_time(self):
+        """
+        State machine has just transitioned to the synchronize_time state
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+
+        def success(_results):
+            self.log.debug('sync-time-success')
+            self._current_task = None
+            self._deferred = reactor.callLater(0, self.success)
+            # Calculate next interval time
+            self._next_interval = self.get_next_interval
+
+        def failure(reason):
+            self.log.info('sync-time-failure', reason=reason)
+            self._current_task = None
+            self._deferred = reactor.callLater(self._timeout_delay, self.failure)
+
+        # Schedule a task to set the ONU time
+        self._current_task = self._sync_time_task(self._agent, self._device_id)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_idle(self):
+        """
+        State machine has just transitioned to the idle state
+
+        In this state, any added PM MEs that need to be created will be.
+        TODO: some non-interval PM stats (if there are any) are collected here
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+
+        if len(self._del_pm_me) and self._delete_me_deferred is None:
+            self._delete_me_deferred = reactor.callLater(0, self.delete_me)
+
+        elif len(self._add_pm_me) and self._add_me_deferred is None:
+            self._add_me_deferred = reactor.callLater(0, self.add_me)
+
+        elif datetime.utcnow() >= self._next_poll_time:
+            def success(results):
+                self._device.timestamp = arrow.utcnow().float_timestamp
+                self._device.mib_synchronizer.mib_set(results.me_class.class_id,
+                                                      results.entity_id,
+                                                      results.attributes)
+                self._next_poll_time = datetime.utcnow() + timedelta(seconds=self._poll_interval)
+
+            def failure(reason):
+                self.log.info('poll-failure', reason=reason)
+                self._device.timestamp = None
+                return None
+
+            # Scan all ANI-G ports
+            ani_g_entities = self._device.configuration.ani_g_entities
+            ani_g_entities_ids = ani_g_entities.keys() if ani_g_entities is not None else None
+
+            if ani_g_entities_ids is not None and len(ani_g_entities_ids):
+                for entity_id in ani_g_entities_ids:
+                    task = OmciGetRequest(self._agent, self.device_id,
+                                          AniG, entity_id,
+                                          self._ani_g_items, allow_failure=True)
+                    self._task_deferred = self._device.task_runner.queue_task(task)
+                    self._task_deferred.addCallbacks(success, failure)
+            else:
+                self.log.warn('poll-pm-no-anis')
+                self._next_poll_time = datetime.utcnow() + timedelta(seconds=self._poll_interval)
+
+        # TODO: Compute a better mechanism than just polling here, perhaps based on
+        #       the next time to fetch data for 'any' interval
+        self._deferred = reactor.callLater(self._tick_delay, self.tick)
+
+    def on_enter_create_pm_me(self):
+        """
+        State machine has just transitioned to the create_pm_me state
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._cancel_tasks()
+        mes, self._add_pm_me = self._add_pm_me, dict()
+
+        def success(results):
+            self.log.debug('create-me-success', results=results)
+
+            # Check if already here. The create request could have received
+            # an already-exists status code which we consider successful
+            for pm, me in mes.items():
+                self._pm_me_collect_retries[pm] = self.pm_collected(pm)
+                self._pm_me_extended_info[pm] = me
+
+            self._current_task = None
+            self._deferred = reactor.callLater(0, self.success)
+
+        def failure(reason):
+            self.log.info('create-me-failure', reason=reason, retries=self._add_pm_me_retry)
+            self._current_task = None
+            if self._add_pm_me_retry <= self._create_attempts:
+              for pm, me in mes.items():
+                  self._add_pm_me[pm] = me
+              self._add_pm_me_retry += 1
+              self._deferred = reactor.callLater(self._timeout_delay, self.failure)
+            else:
+              # we cant seem to create any collection me, no point in doing anything
+              self.log.warn('unable-to-create-pm-me-disabling-collection', reason=reason, device_id=self._device_id)
+              self._deferred = reactor.callLater(self._timeout_delay, self.stop)
+
+        self._current_task = self._create_pm_task(self._agent, self._device_id, mes)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_delete_pm_me(self):
+        """
+        State machine has just transitioned to the delete_pm_me state
+        """
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._cancel_tasks()
+
+        mes, self._del_pm_me = self._del_pm_me, set()
+
+        def success(results):
+            self.log.debug('delete-me-success', results=results)
+            self._current_task = None
+            for me in mes:
+                self._pm_me_collect_retries.pop(me)
+
+            self._deferred = reactor.callLater(0, self.success)
+
+        def failure(reason):
+            self.log.info('delete-me-failure', reason=reason)
+            self._current_task = None
+            for me in mes:
+                self._del_pm_me.add(me)
+
+            self._deferred = reactor.callLater(self._timeout_delay, self.failure)
+
+        self._current_task = self._delete_pm_task(self._agent, self._device_id, mes)
+        self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+        self._task_deferred.addCallbacks(success, failure)
+
+    def on_enter_collect_data(self):
+        """
+        State machine has just transitioned to the collect_data state
+        """
+
+        if self._next_interval is not None and self._next_interval > datetime.utcnow():
+            self.log.debug('wait-next-interval')
+            # Not ready for next interval, transition back to idle and we should get
+            # called again after a short delay
+            reactor.callLater(0, self.success)
+            return
+
+        self.advertise(OpenOmciEventType.state_change, self.state)
+        self._cancel_deferred()
+        self._cancel_tasks()
+        keys = self._pm_me_collect_retries.keys()
+        shuffle(keys)
+
+        for key in keys:
+            class_id = key[0]
+            entity_id = key[1]
+
+            self.log.debug("in-enter-collect-data", data_key=key,
+                           retries=self._pm_me_collect_retries[key])
+
+            # Collect the data ?
+            if self._pm_me_collect_retries[key] > 0:
+                def success(results):
+                    self.log.debug('collect-success', results=results,
+                                   class_id=results.get('class_id'),
+                                   entity_id=results.get('entity_id'))
+                    self._current_task = None
+                    self._pm_me_collect_retries[key] = 0
+                    self._deferred = reactor.callLater(0, self.success)
+                    return results
+
+                def failure(reason):
+                    self.log.info('collect-failure', reason=reason)
+                    self._current_task = None
+                    self._pm_me_collect_retries[key] -= 1
+                    self._deferred = reactor.callLater(self._timeout_delay, self.failure)
+                    return reason   # Halt callback processing
+
+                # start the task
+                if key in self._pm_me_extended_info:
+                    self.log.debug('collect-extended-info-found', data_key=key,
+                                   extended_info=self._pm_me_extended_info[key])
+                    parent_class_id = self._pm_me_extended_info[key][0]
+                    parent_entity_id = self._pm_me_extended_info[key][1]
+                    upstream = self._pm_me_extended_info[key][2]
+                else:
+                    self.log.debug('collect-extended-info-not-found', data_key=key)
+                    parent_class_id = None
+                    parent_entity_id = None
+                    upstream = None
+
+                self._current_task = self._get_interval_task(self._agent, self._device_id,
+                                                             class_id, entity_id,
+                                                             parent_class_id=parent_class_id,
+                                                             parent_entity_id=parent_entity_id,
+                                                             upstream=upstream)
+                self._task_deferred = self._device.task_runner.queue_task(self._current_task)
+                self._task_deferred.addCallbacks(success, failure)
+                self._task_deferred.addCallback(self.publish_data)
+                return
+
+        # Here if all intervals have been collected (we are up to date)
+        self._next_interval = self.get_next_interval
+        self.log.debug('collect-calculate-next', next=self._next_interval)
+
+        self._pm_me_collect_retries = dict.fromkeys(self._pm_me_collect_retries, self._collect_attempts)
+        reactor.callLater(0, self.success)
+
+    def on_enter_threshold_exceeded(self):
+        """
+        State machine has just transitioned to the threshold_exceeded state
+        """
+        pass  # TODO: Not sure if we want this state. Need to get alarm synchronizer working first
+
+    @property
+    def get_next_interval(self):
+        """
+        Determine the time for the next interval collection for all of this
+        ONUs PM Intervals. Earliest fetch time is at least 1 minute into the
+        next interval.
+
+        :return: (datetime) UTC time to get the next interval
+        """
+        now = datetime.utcnow()
+
+        # Get delta seconds to at least 1 minute into next interval
+        next_delta_secs = (16 - (now.minute % 15)) * 60
+        next_interval = now + timedelta(seconds=next_delta_secs)
+
+        # NOTE: For debugging, uncomment next section to perform collection
+        #       right after initial code startup/mib-sync
+        if self._next_interval is None:
+            return now     # Do it now  (just for debugging purposes)
+
+        # Skew the next time up to the maximum specified
+        # TODO: May want to skew in a shorter range and select the minute
+        #       based off some device property value to make collection a
+        #       little more predictable on a per-ONU basis.
+        return next_interval + timedelta(seconds=uniform(0, self._interval_skew))
+
+    def pm_collected(self, key):
+        """
+        Query database and determine if PM data needs to be collected for this ME
+        """
+        class_id = key[0]
+        entity_id = key[1]
+
+        return self._collect_attempts        # TODO: Implement persistent storage
+
+    def publish_data(self, results):
+        """
+        Publish the PM interval results on the appropriate bus.  The results are
+        a dictionary with the following format.
+
+            'class-id':          (int) ME Class ID,
+            'entity-id':         (int) ME Entity ID,
+            'me-name':           (str) ME Class name,   # Mostly for debugging...
+            'interval-end-time': None,
+            'interval-utc-time': (DateTime) UTC time when retrieved from ONU,
+
+            Counters added here as they are retrieved with the format of
+            'counter-attribute-name': value (int)
+
+        :param results: (dict) PM results
+        """
+        self.log.debug('collect-publish', results=results)
+
+        if self._pm_config is not None:
+            self._pm_config.publish_metrics(results)
+
+        pass  # TODO: Save off last time interval fetched to persistent storage?
+
+    def on_mib_reset_response(self, _topic, msg):
+        """
+        Called upon receipt of a MIB Reset Response for this ONU
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-mib-reset-response', state=self.state)
+        try:
+            response = msg[RX_RESPONSE_KEY]
+            omci_msg = response.fields['omci_message'].fields
+            status = omci_msg['success_code']
+
+            if status == RC.Success:
+                for class_id in self._me_watch_list.iterkeys():
+                    # BP entity_id -> (PM class_id, PM entity_id)
+                    instances = self._me_watch_list[class_id]['instances']
+                    for _, me_pair in instances.items():
+                        self._me_watch_list[class_id]['create-delete'](None, me_pair[0],
+                                                                       me_pair[1], add=False)
+                    self._me_watch_list[class_id]['instances'] = dict()
+
+        except KeyError:
+            pass            # NOP
+
+    def on_create_response(self, _topic, msg):
+        """
+        Called upon receipt of a Create Response for this ONU.
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-create-response', state=self.state)
+
+        def valid_request(stat, c_id, e_id):
+            return self._omci_cc_subscriptions[RxEvent.Delete] is not None\
+                and stat in (RC.Success, RC.InstanceExists) \
+                and c_id in self._me_watch_list.keys() \
+                and e_id not in self._me_watch_list[c_id]['instances']
+
+        response = msg[RX_RESPONSE_KEY]
+        omci = response.fields['omci_message'].fields
+        class_id = omci['entity_class']
+        entity_id = omci['entity_id']
+        status = omci['success_code']
+
+        if valid_request(status, class_id, entity_id):
+            request = msg[TX_REQUEST_KEY]
+            method = self._me_watch_list[class_id]['create-delete']
+            cid, eid = method(request, class_id, entity_id, add=True)
+
+            if cid > 0:
+                # BP entity_id -> (PM class_id, PM entity_id)
+                instances = self._me_watch_list[class_id]['instances']
+                instances[entity_id] = (cid, eid)
+
+    def on_delete_response(self, _topic, msg):
+        """
+        Called upon receipt of a Delete Response for this ONU
+
+        :param _topic: (str) OMCI-RX topic
+        :param msg: (dict) Dictionary with 'rx-response' and 'tx-request' (if any)
+        """
+        self.log.debug('on-delete-response', state=self.state)
+
+        def valid_request(stat, cid, eid):
+            return self._omci_cc_subscriptions[RxEvent.Delete] is not None\
+                and stat in (RC.Success, RC.UnknownInstance) \
+                and cid in self._me_watch_list.keys() \
+                and eid in self._me_watch_list[cid]['instances']
+
+        response = msg[RX_RESPONSE_KEY]
+        omci = response.fields['omci_message'].fields
+        class_id = omci['entity_class']
+        entity_id = omci['entity_id']
+        status = omci['success_code']
+
+        if valid_request(status, class_id, entity_id):
+            request = msg[TX_REQUEST_KEY]
+            method = self._me_watch_list[class_id]['create-delete']
+
+            method(request, class_id, entity_id, add=False)
+            # BP entity_id -> (PM class_id, PM entity_id)
+            instances = self._me_watch_list[class_id]['instances']
+            del instances[entity_id]
+
+    def get_pm_entity_id_for_add(self, pm_cid, eid):
+        """
+        Select the Entity ID to use for a specific PM Class ID.  For extended
+        PM ME's, an entity id (>0) is allocated
+
+        :param pm_cid: (int) PM ME Class ID to create/get entry ID for
+        :param eid: (int) Reference class's entity ID. Used as PM entity ID for non-
+                    extended PM history PMs
+        :return: (int) Entity ID to use
+        """
+        if pm_cid in (EthernetFrameExtendedPerformanceMonitoring.class_id,
+                      EthernetFrameExtendedPerformanceMonitoring64Bit.class_id):
+            return self._enet_entity_id.get_next()
+        return eid
+
+    def release_pm_entity_id(self, pm_cid, eid):
+        if pm_cid in (EthernetFrameExtendedPerformanceMonitoring.class_id,
+                      EthernetFrameExtendedPerformanceMonitoring64Bit.class_id):
+            try:
+                self._enet_entity_id.release(eid)
+            except:
+                pass
+
+    def add_remove_enet_frame_pm(self, request, class_id, entity_id,
+                                 add=True,
+                                 attributes=None):
+        """
+        Add/remove PM for the dynamic MAC Port configuration data.
+
+        This can be called in a variety of ways:
+
+           o If from an Response event from OMCI_CC, the request will contain
+             the original create/delete request. The class_id and entity_id will
+             be the MAC Data Configuration Data class and instance ID.
+             add = True if create, False if delete
+
+           o If starting up (and the associated ME is already created), the MAC
+             Data Configuration Data class and instance ID, and attributes are
+             provided. request = None and add = True
+
+           o If cleaning up (stopping), the PM ME class_id, entity_id are provided.
+             request = None and add = False
+
+        :return: (int, int) PM ME class_id and entity_id for add/remove was performed.
+                            class and entity IDs are non-zero on success
+        """
+        pm_entity_id = 0
+        cid = 0
+        eid = 0
+        upstream = False
+
+        def tp_type_to_pm(tp):
+            # TODO: Support 64-bit extended Monitoring MEs.
+            # This will result in the need to maintain entity IDs of PMs differently
+            upstream_types = [  # EthernetFrameExtendedPerformanceMonitoring64Bit.class_id,
+                              EthernetFrameExtendedPerformanceMonitoring.class_id,
+                              EthernetFrameUpstreamPerformanceMonitoringHistoryData.class_id], True
+            downstream_types = [  # EthernetFrameExtendedPerformanceMonitoring64Bit.class_id,
+                                EthernetFrameExtendedPerformanceMonitoring.class_id,
+                                EthernetFrameDownstreamPerformanceMonitoringHistoryData.class_id], False
+            return {
+                1: downstream_types,
+                3: upstream_types,
+                5: downstream_types,
+                6: downstream_types,
+            }.get(tp, None)
+
+        if request is not None:
+            assert class_id == MacBridgePortConfigurationData.class_id
+
+            # Is this associated with the ANI or the UNI side of the bridge?
+            # For VOLTHA v2.0, only high-speed internet data service is
+            attributes = request.fields['omci_message'].fields['data']
+            pm_class_ids, upstream = tp_type_to_pm(attributes['tp_type'])
+            cid = request.fields['omci_message'].fields['entity_class']
+            eid = request.fields['omci_message'].fields['entity_id']
+            if not add:
+                instances = self._me_watch_list[cid]['instances']
+                _, pm_entity_id = instances.get(eid, (None, None))
+
+        elif add:
+            assert class_id == MacBridgePortConfigurationData.class_id
+            assert isinstance(attributes, dict)
+
+            # Is this associated with the ANI or the UNI side of the bridge?
+            pm_class_ids, upstream = tp_type_to_pm(attributes.get('tp_type'))
+            cid = class_id
+            eid = entity_id
+
+        else:
+            assert class_id in (EthernetFrameUpstreamPerformanceMonitoringHistoryData.class_id,
+                                EthernetFrameDownstreamPerformanceMonitoringHistoryData.class_id,
+                                EthernetFrameExtendedPerformanceMonitoring.class_id,
+                                EthernetFrameExtendedPerformanceMonitoring64Bit.class_id)
+            pm_class_ids = [class_id]
+
+        if pm_class_ids is None:
+            return False     # Unable to select a supported ME for this ONU
+
+        if add:
+            for pm_class_id in pm_class_ids:
+                if self._me_is_supported(pm_class_id):
+                    pm_entity_id = self.get_pm_entity_id_for_add(pm_class_id, eid)
+                    self.add_pm_me(pm_class_id, pm_entity_id, cid=cid, eid=eid,
+                                   upstream=upstream)
+                    return pm_class_id, pm_entity_id
+        else:
+            for pm_class_id in pm_class_ids:
+                if self._me_is_supported(pm_class_id):
+                    self.delete_pm_me(pm_class_id, pm_entity_id)
+                    self.release_pm_entity_id(pm_class_id, pm_entity_id)
+                    return pm_class_id, pm_entity_id
+
+        return 0, 0
diff --git a/python/extensions/omci/tasks/__init__.py b/python/extensions/omci/tasks/__init__.py
new file mode 100644
index 0000000..b0fb0b2
--- /dev/null
+++ b/python/extensions/omci/tasks/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/python/extensions/omci/tasks/alarm_resync_task.py b/python/extensions/omci/tasks/alarm_resync_task.py
new file mode 100644
index 0000000..a16f3a2
--- /dev/null
+++ b/python/extensions/omci/tasks/alarm_resync_task.py
@@ -0,0 +1,393 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure, returnValue
+from twisted.internet import reactor
+from common.utils.asleep import asleep
+from voltha.extensions.omci.database.mib_db_dict import *
+from voltha.extensions.omci.omci_defs import AttributeAccess
+from voltha.extensions.omci.database.alarm_db_ext import AlarmDbExternal
+
+AA = AttributeAccess
+
+
+class AlarmCopyException(Exception):
+    pass
+
+
+class AlarmDownloadException(Exception):
+    pass
+
+
+class AlarmResyncException(Exception):
+    pass
+
+
+class AlarmResyncTask(Task):
+    """
+    OpenOMCI ALARM resynchronization Task
+
+    This task should get a copy of the ALARM and compare compare it to a
+    copy of the database. When the ALARM Upload command is sent to the ONU,
+    it should make a copy and source the data requested from this database.
+    The ONU can still source AVC's and the the OLT can still send config
+    commands to the actual.
+    """
+    task_priority = Task.DEFAULT_PRIORITY
+    name = "ALARM Resynchronization Task"
+
+    max_retries = 3
+    retry_delay = 7
+
+    max_alarm_upload_next_retries = 3
+    alarm_upload_next_delay = 10          # Max * delay < 60 seconds
+
+    def __init__(self, omci_agent, device_id):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        """
+        super(AlarmResyncTask, self).__init__(AlarmResyncTask.name,
+                                              omci_agent,
+                                              device_id,
+                                              priority=AlarmResyncTask.task_priority,
+                                              exclusive=False)
+        self._local_deferred = None
+        self._device = omci_agent.get_device(device_id)
+        self._db_active = MibDbVolatileDict(omci_agent)
+        self._db_active.start()
+
+    def cancel_deferred(self):
+        super(AlarmResyncTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start ALARM Re-Synchronization task
+        """
+        super(AlarmResyncTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_alarm_resync)
+        self._db_active.start()
+        self._db_active.add(self.device_id)
+
+    def stop(self):
+        """
+        Shutdown ALARM Re-Synchronization task
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        self._device = None
+        self._db_active.stop()
+        self._db_active = None
+        super(AlarmResyncTask, self).stop()
+
+    @inlineCallbacks
+    def perform_alarm_resync(self):
+        """
+        Perform the ALARM Resynchronization sequence
+
+        The sequence to be performed is:
+            - get a copy of the current ALARM database
+
+            - perform ALARM upload commands to get ONU's database and save this
+              to a local DB.
+        During the alarm upload process, the maximum time between alarm upload next
+        requests is 1 minute.
+        """
+        self.log.debug('perform-alarm-resync')
+
+        try:
+            self.strobe_watchdog()
+            results = yield self.snapshot_alarm()
+            olt_db_copy = results[0]
+            number_of_commands = results[1]
+
+            if olt_db_copy is None:
+                e = AlarmCopyException('Failed to get local database copy')
+                self.deferred.errback(failure.Failure(e))
+            else:
+                # Start the ALARM upload sequence, save alarms to the table
+                self.strobe_watchdog()
+
+                if number_of_commands > 0:
+                    commands_retrieved = yield self.upload_alarm(number_of_commands)
+                else:
+                    commands_retrieved = 0
+
+                if commands_retrieved != number_of_commands:
+                    e = AlarmDownloadException('Only retrieved {} of {} instances'.
+                                               format(commands_retrieved, number_of_commands))
+                    self.deferred.errback(failure.Failure(e))
+                else:
+                    # Compare the databases
+                    onu_db_copy = self._db_active.query(self.device_id)
+
+                    on_olt_only, on_onu_only, attr_diffs = \
+                        self.compare_mibs(olt_db_copy, onu_db_copy)
+
+                    on_olt_only = on_olt_only if len(on_olt_only) else None
+                    on_onu_only = on_onu_only if len(on_onu_only) else None
+                    attr_diffs = attr_diffs if len(attr_diffs) else None
+
+                    on_olt_only_diffs = on_olt_only if on_olt_only and len(on_olt_only) else None
+                    on_onu_only_diffs = on_onu_only if on_onu_only and len(on_onu_only) else None
+                    attr_diffs = attr_diffs if attr_diffs and len(attr_diffs) else None
+
+                    if all(diff is None for diff in [on_olt_only_diffs, on_onu_only_diffs, attr_diffs]):
+                        results = None
+                    else:
+                        results = {
+                            'onu-only': on_onu_only_diffs,
+                            'olt-only': on_olt_only_diffs,
+                            'attr-diffs': attr_diffs,
+                            'onu-db': onu_db_copy,
+                            'olt-db': olt_db_copy
+                        }
+                    self.deferred.callback(results)
+
+        except Exception as e:
+            self.log.exception('resync', e=e)
+            self.deferred.errback(failure.Failure(e))
+
+    @inlineCallbacks
+    def snapshot_alarm(self):
+        """
+        Snapshot the ALARM on the ONU and create a copy of our local ALARM database
+
+        :return: (pair) (command_sequence_number)
+        """
+        olt_db_copy = None
+        command_sequence_number = None
+
+        try:
+            max_tries = AlarmResyncTask.max_retries - 1
+
+            for retries in xrange(0, max_tries + 1):
+                # Send ALARM Upload so ONU snapshots its ALARM
+                try:
+                    command_sequence_number = yield self.send_alarm_upload()
+                    self.strobe_watchdog()
+
+                    if command_sequence_number is None:
+                        if retries >= max_tries:
+                            olt_db_copy = None
+                            break
+
+                except TimeoutError as e:
+                    self.log.warn('timeout', e=e)
+                    if retries >= max_tries:
+                        raise
+
+                    self.strobe_watchdog()
+                    yield asleep(AlarmResyncTask.retry_delay)
+                    continue
+
+                # Get a snapshot of the local MIB database
+                olt_db_copy = self._device.query_alarm_table()
+                # if we made it this far, no need to keep trying
+                break
+
+        except Exception as e:
+            self.log.exception('alarm-resync', e=e)
+            raise
+
+        # Handle initial failures
+
+        if olt_db_copy is None or command_sequence_number is None:
+            raise AlarmCopyException('Failed to snapshot ALARM copy after {} retries'.
+                                     format(AlarmResyncTask.max_retries))
+
+        returnValue((olt_db_copy, command_sequence_number))
+
+    @inlineCallbacks
+    def send_alarm_upload(self):
+        """
+        Perform ALARM upload command and get the number of entries to retrieve
+
+        :return: (int) Number of commands to execute or None on error
+        """
+        ########################################
+        # Begin ALARM Upload
+        try:
+            results = yield self._device.omci_cc.send_get_all_alarm()
+            self.strobe_watchdog()
+            command_sequence_number = results.fields['omci_message'].fields['number_of_commands']
+
+            if command_sequence_number < 0:
+                raise ValueError('Number of commands was {}'.format(command_sequence_number))
+
+            returnValue(command_sequence_number)
+
+        except TimeoutError as e:
+            self.log.warn('alarm-resync-get-timeout', e=e)
+            raise
+
+    @inlineCallbacks
+    def upload_alarm(self, command_sequence_number):
+        ########################################
+        # Begin ALARM Upload
+        seq_no = None
+
+        for seq_no in xrange(command_sequence_number):
+            max_tries = AlarmResyncTask.max_alarm_upload_next_retries
+
+            for retries in xrange(0, max_tries):
+                try:
+                    response = yield self._device.omci_cc.send_get_all_alarm_next(seq_no)
+                    self.strobe_watchdog()
+
+                    omci_msg = response.fields['omci_message'].fields
+                    alarm_class_id = omci_msg['alarmed_entity_class']
+                    alarm_entity_id = omci_msg['alarmed_entity_id']
+
+                    alarm_bit_map = omci_msg['alarm_bit_map']
+                    attributes = {AlarmDbExternal.ALARM_BITMAP_KEY: alarm_bit_map}
+
+                    # Save to the database
+                    self._db_active.set(self.device_id, alarm_class_id,
+                                        alarm_entity_id, attributes)
+                    break
+
+                except TimeoutError:
+                    self.log.warn('alarm-resync-timeout', seq_no=seq_no,
+                                  command_sequence_number=command_sequence_number)
+
+                    if retries < max_tries - 1:
+                        yield asleep(AlarmResyncTask.alarm_upload_next_delay)
+                        self.strobe_watchdog()
+                    else:
+                        raise
+
+                except Exception as e:
+                    self.log.exception('resync', e=e, seq_no=seq_no,
+                                       command_sequence_number=command_sequence_number)
+
+        returnValue(seq_no + 1)     # seq_no is zero based and alarm table.
+
+    def compare_mibs(self, db_copy, db_active):
+        """
+        Compare the our db_copy with the ONU's active copy
+
+        :param db_copy: (dict) OpenOMCI's copy of the database
+        :param db_active: (dict) ONU's database snapshot
+        :return: (dict), (dict), dict()  Differences
+        """
+        self.strobe_watchdog()
+
+        # Class & Entities only in local copy (OpenOMCI)
+        on_olt_only = self.get_lsh_only_dict(db_copy, db_active)
+
+        # Class & Entities only on remote (ONU)
+        on_onu_only = self.get_lsh_only_dict(db_active, db_copy)
+
+        # Class & Entities on both local & remote, but one or more attributes
+        # are different on the ONU.  This is the value that the local (OpenOMCI)
+        # thinks should be on the remote (ONU)
+
+        me_map = self.omci_agent.get_device(self.device_id).me_map
+        attr_diffs = self.get_attribute_diffs(db_copy, db_active, me_map)
+
+        return on_olt_only, on_onu_only, attr_diffs
+
+    def get_lsh_only_dict(self, lhs, rhs):
+        """
+        Compare two MIB database dictionaries and return the ME Class ID and
+        instances that are unique to the lhs dictionary. Both parameters
+        should be in the common MIB Database output dictionary format that
+        is returned by the mib 'query' command.
+
+        :param lhs: (dict) Left-hand-side argument.
+        :param rhs: (dict) Right-hand-side argument
+
+        return: (list(int,int)) List of tuples where (class_id, inst_id)
+        """
+        results = list()
+
+        for cls_id, cls_data in lhs.items():
+            # Get unique classes
+            #
+            # Skip keys that are not class IDs
+            if not isinstance(cls_id, int):
+                continue
+
+            if cls_id not in rhs:
+                results.extend([(cls_id, inst_id) for inst_id in cls_data.keys()
+                                if isinstance(inst_id, int)])
+            else:
+                # Get unique instances of a class
+                lhs_cls = cls_data
+                rhs_cls = rhs[cls_id]
+
+                for inst_id, _ in lhs_cls.items():
+                    # Skip keys that are not instance IDs
+                    if isinstance(cls_id, int) and inst_id not in rhs_cls:
+                        results.extend([(cls_id, inst_id)])
+
+        return results
+
+    def get_attribute_diffs(self, omci_copy, onu_copy, me_map):
+        """
+        Compare two OMCI MIBs and return the ME class and instance IDs that exists
+        on both the local copy and the remote ONU that have different attribute
+        values. Both parameters should be in the common MIB Database output
+        dictionary format that is returned by the mib 'query' command.
+
+        :param omci_copy: (dict) OpenOMCI copy (OLT-side) of the MIB Database
+        :param onu_copy: (dict) active ONU latest copy its database
+        :param me_map: (dict) ME Class ID MAP for this ONU
+
+        return: (list(int,int,str)) List of tuples where (class_id, inst_id, attribute)
+                                    points to the specific ME instance where attributes
+                                    are different
+        """
+        results = list()
+
+        # Get class ID's that are in both
+        class_ids = {cls_id for cls_id, _ in omci_copy.items()
+                     if isinstance(cls_id, int) and cls_id in onu_copy}
+
+        for cls_id in class_ids:
+            # Get unique instances of a class
+            olt_cls = omci_copy[cls_id]
+            onu_cls = onu_copy[cls_id]
+
+            # Get set of common instance IDs
+            inst_ids = {inst_id for inst_id, _ in olt_cls.items()
+                        if isinstance(inst_id, int) and inst_id in onu_cls}
+
+            for inst_id in inst_ids:
+                omci_attributes = {k for k in olt_cls[inst_id][ATTRIBUTES_KEY].iterkeys()}
+                onu_attributes = {k for k in onu_cls[inst_id][ATTRIBUTES_KEY].iterkeys()}
+
+                # Get attributes that exist in one database, but not the other
+                sym_diffs = (omci_attributes ^ onu_attributes)
+                results.extend([(cls_id, inst_id, attr) for attr in sym_diffs])
+
+                # Get common attributes with different values
+                common_attributes = (omci_attributes & onu_attributes)
+                results.extend([(cls_id, inst_id, attr) for attr in common_attributes
+                               if olt_cls[inst_id][ATTRIBUTES_KEY][attr] !=
+                                onu_cls[inst_id][ATTRIBUTES_KEY][attr]])
+        return results
diff --git a/python/extensions/omci/tasks/file_download_task.py b/python/extensions/omci/tasks/file_download_task.py
new file mode 100755
index 0000000..63da427
--- /dev/null
+++ b/python/extensions/omci/tasks/file_download_task.py
@@ -0,0 +1,108 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure, AlreadyCalledError
+from twisted.internet import reactor
+from voltha.extensions.omci.omci_defs import ReasonCodes
+import requests
+import os
+import time
+
+class FileDownloadTask(Task):
+    name = "Image File Download Task"
+    CHUNK_SIZE = 1024
+    
+    def __init__(self, omci_agent, img_dnld, clock= None): #device_id, url, local_path)
+        super(FileDownloadTask, self).__init__(FileDownloadTask.name, omci_agent, img_dnld.id,
+                                               exclusive=False,
+                                               watchdog_timeout=45)
+        # self.url = url
+        # self.local_path = local_path
+        self._image_download = img_dnld
+        self.reactor = clock if clock is not None else reactor
+        self._local_deferred = None
+        # self._request = None
+        # self._file = None
+        # self.log.debug('{} running'.format(FileDownloadTask.name))
+
+    # def __save_data(self):
+    #     chunk = self._request.iter_content(chunk_size=FileDownloadTask.CHUNK_SIZE)
+    #     if len(chunk) == 0:
+    #         self._file.close()
+    #         self.deferred.callback(self._image_download)
+    #     else:
+    #         self._file.write(chunk)
+    #         self._image_download.downloaded_bytes += len(chunk)
+    #         self.reactor.callLater(0, self.__save_data)        
+
+    @inlineCallbacks
+    def perform_download_data(self):
+        try:
+            r = requests.get(self._image_download.url, stream=True)
+            with open(self._image_download.local_dir + '/' + self._image_download.name, 'wb') as f:
+                for chunk in r.iter_content(chunk_size=FileDownloadTask.CHUNK_SIZE):
+                    self.strobe_watchdog()
+                    if chunk: # filter out keep-alive new chunks
+                        yield f.write(chunk)
+                        self._image_download.file_size += len(chunk)
+                        # yield time.sleep(1)
+            self.deferred.callback(self._image_download)
+        except Exception as e:
+            self.deferred.errback(failure.Failure(e))
+        
+    def start(self):
+        super(FileDownloadTask, self).start()
+        if not os.path.exists(self._image_download.local_dir):
+            os.makedirs(self._image_download.local_dir)
+
+        self.strobe_watchdog()
+        self._image_download.file_size = 0
+        self._local_deferred = self.reactor.callLater(0, self.perform_download_data)
+        # try:
+        #     if not os.path.exists(self._image_download.local_dir):
+        #         os.makedirs(self._image_download.local_dir)
+
+        #     self.strobe_watchdog()
+        #     self._image_download.downloaded_bytes = 0
+        #     self.reactor.callLater(0, self.perform_download_data)
+            
+            # self._request = requests.get(self._image_download.url, stream=True)
+            # with open(self._image_download.local_dir + '/' + self._image_download.name, 'wb') as f:
+            #     for chunk in r.iter_content(chunk_size=FileDownloadTask.CHUNK_SIZE):
+            #         self.strobe_watchdog()
+            #         if chunk: # filter out keep-alive new chunks
+            #             f.write(chunk)
+            #             self._image_download.downloaded_bytes += len(chunk)
+            
+            # self.deferred.callback(self._image_download)
+        # except Exception as e:
+        #     self.deferred.errback(failure.Failure(e))
+            
+    # def stop(self):
+    #     # self.cancel_deferred()
+    #     super(FileDownloadTask, self).stop()
+
+    def cancel_deferred(self):
+        self.log.debug('FileDownloadTask cancel_deferred')
+        super(FileDownloadTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
diff --git a/python/extensions/omci/tasks/get_mds_task.py b/python/extensions/omci/tasks/get_mds_task.py
new file mode 100644
index 0000000..1560c83
--- /dev/null
+++ b/python/extensions/omci/tasks/get_mds_task.py
@@ -0,0 +1,112 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure
+from voltha.extensions.omci.omci_me import OntDataFrame
+from voltha.extensions.omci.omci_defs import ReasonCodes as RC
+
+
+class GetMdsTask(Task):
+    """
+    OpenOMCI Get MIB Data Sync value task
+
+    On successful completion, this task will call the 'callback' method of the
+    deferred returned by the start method and return the value of the MIB
+    Data Sync attribute of the ONT Data ME
+    """
+    task_priority = Task.DEFAULT_PRIORITY
+    name = "Get MDS Task"
+
+    def __init__(self, omci_agent, device_id):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        """
+        super(GetMdsTask, self).__init__(GetMdsTask.name,
+                                         omci_agent,
+                                         device_id,
+                                         priority=GetMdsTask.task_priority)
+        self._local_deferred = None
+
+    def cancel_deferred(self):
+        super(GetMdsTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start MIB Synchronization tasks
+        """
+        super(GetMdsTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_get_mds)
+
+    def stop(self):
+        """
+        Shutdown MIB Synchronization tasks
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        super(GetMdsTask, self).stop()
+
+    @inlineCallbacks
+    def perform_get_mds(self):
+        """
+        Get the 'mib_data_sync' attribute of the ONU
+        """
+        self.log.debug('perform-get-mds')
+
+        try:
+            device = self.omci_agent.get_device(self.device_id)
+
+            #########################################
+            # Request (MDS supplied value does not matter for a 'get' request)
+
+            self.strobe_watchdog()
+            results = yield device.omci_cc.send(OntDataFrame().get())
+
+            omci_msg = results.fields['omci_message'].fields
+            status = omci_msg['success_code']
+
+            # Note: Currently the data reported by the Scapy decode is 16-bits since we need
+            #       the data field that large in order to support MIB and Alarm Upload Next
+            #       commands.  Select only the first 8-bits since that is the size of the MIB
+            #       Data Sync attribute
+            mds = (omci_msg['data']['mib_data_sync'] >> 8) & 0xFF \
+                if 'data' in omci_msg and 'mib_data_sync' in omci_msg['data'] else -1
+
+            self.log.debug('ont-data-mds', status=status, mib_data_sync=mds)
+
+            assert status == RC.Success, 'Unexpected Response Status: {}'.format(status)
+
+            # Successful if here
+            self.deferred.callback(mds)
+
+        except TimeoutError as e:
+            self.log.warn('get-mds-timeout', e=e)
+            self.deferred.errback(failure.Failure(e))
+
+        except Exception as e:
+            self.log.exception('get-mds', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/interval_data_task.py b/python/extensions/omci/tasks/interval_data_task.py
new file mode 100644
index 0000000..d41c1d0
--- /dev/null
+++ b/python/extensions/omci/tasks/interval_data_task.py
@@ -0,0 +1,198 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from datetime import datetime
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure
+from voltha.extensions.omci.omci_defs import ReasonCodes
+from voltha.extensions.omci.omci_frame import OmciFrame, OmciGet
+
+
+class IntervalDataTaskFailure(Exception):
+    pass
+
+
+class IntervalDataTask(Task):
+    """
+    OpenOMCI Performance Interval Get Request
+    """
+    task_priority = Task.DEFAULT_PRIORITY
+    name = "Interval Data Task"
+    max_payload = 29
+
+    def __init__(self, omci_agent, device_id, class_id, entity_id,
+                 max_get_response_payload=max_payload,
+                 parent_class_id=None,
+                 parent_entity_id=None,
+                 upstream=None):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        :param class_id: (int) ME Class ID
+        :param entity_id: (int) ME entity ID
+        :param max_get_response_payload: (int) Maximum number of octets in a
+                                               single GET response frame
+        """
+        super(IntervalDataTask, self).__init__(IntervalDataTask.name,
+                                               omci_agent,
+                                               device_id,
+                                               priority=IntervalDataTask.task_priority,
+                                               exclusive=False)
+        self._local_deferred = None
+        self._class_id = class_id
+        self._entity_id = entity_id
+
+        self._parent_class_id = parent_class_id
+        self._parent_entity_id = parent_entity_id
+        self._upstream = upstream
+
+        me_map = self.omci_agent.get_device(self.device_id).me_map
+        if self._class_id not in me_map:
+            msg = "The requested ME Class () does not exist in the ONU's ME Map".format(self._class_id)
+            self.log.warn('unknown-pm-me', msg=msg)
+            raise IntervalDataTaskFailure(msg)
+
+        self._entity = me_map[self._class_id]
+        self._counter_attributes = self.get_counter_attributes_names_and_size()
+        self._max_payload = max_get_response_payload
+
+    def cancel_deferred(self):
+        super(IntervalDataTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start the tasks
+        """
+        super(IntervalDataTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_get_interval)
+
+    def stop(self):
+        """
+        Shutdown the tasks
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        super(IntervalDataTask, self).stop()
+
+    def get_counter_attributes_names_and_size(self):
+        """
+        Get all of the counter attributes names and the amount of storage they take
+
+        :return: (dict) Attribute name -> length
+        """
+        return {name: self._entity.attributes[attr_index].field.sz
+                for name, attr_index in self._entity.attribute_name_to_index_map.items()
+                if self._entity.attributes[attr_index].is_counter}
+
+    @inlineCallbacks
+    def perform_get_interval(self):
+        """
+        Sync the time
+        """
+        self.log.info('perform-get-interval', class_id=self._class_id,
+                      entity_id=self._entity_id)
+
+        device = self.omci_agent.get_device(self.device_id)
+        attr_names = self._counter_attributes.keys()
+
+        final_results = {
+            'class_id': self._class_id,
+            'entity_id': self._entity_id,
+            'me_name': self._entity.__name__,   # Mostly for debugging...
+            'interval_utc_time': None,
+            'parent_class_id': self._parent_class_id,
+            'parent_entity_id': self._parent_entity_id,
+            'upstream': self._upstream
+            # Counters added here as they are retrieved
+        }
+        last_end_time = None
+
+        while len(attr_names) > 0:
+            # Get as many attributes that will fit. Always include the 1 octet
+            # Interval End Time Attribute and 2 octets for the Entity ID
+
+            remaining_payload = self._max_payload - 3
+            attributes = list()
+            for name in attr_names:
+                if self._counter_attributes[name] > remaining_payload:
+                    break
+
+                attributes.append(name)
+                remaining_payload -= self._counter_attributes[name]
+
+            attr_names = attr_names[len(attributes):]
+            attributes.append('interval_end_time')
+
+            frame = OmciFrame(
+                transaction_id=None,
+                message_type=OmciGet.message_id,
+                omci_message=OmciGet(
+                    entity_class=self._class_id,
+                    entity_id=self._entity_id,
+                    attributes_mask=self._entity.mask_for(*attributes)
+                )
+            )
+            self.log.debug('interval-get-request', class_id=self._class_id,
+                           entity_id=self._entity_id)
+            try:
+                self.strobe_watchdog()
+                results = yield device.omci_cc.send(frame)
+
+                omci_msg = results.fields['omci_message'].fields
+                status = omci_msg['success_code']
+                end_time = omci_msg['data'].get('interval_end_time')
+
+                self.log.debug('interval-get-results', class_id=self._class_id,
+                               entity_id=self._entity_id, status=status,
+                               end_time=end_time)
+
+                if status != ReasonCodes.Success:
+                    raise IntervalDataTaskFailure('Unexpected Response Status: {}, Class ID: {}'.
+                                                  format(status, self._class_id))
+                if last_end_time is None:
+                    last_end_time = end_time
+
+                elif end_time != last_end_time:
+                    msg = 'Interval End Time Changed during retrieval from {} to {}'\
+                        .format(last_end_time, end_time)
+                    self.log.info('interval-roll-over', msg=msg, class_id=self._class_id)
+                    raise IntervalDataTaskFailure(msg)
+
+                final_results['interval_utc_time'] = datetime.utcnow()
+                for attribute in attributes:
+                    final_results[attribute] = omci_msg['data'].get(attribute)
+
+            except TimeoutError as e:
+                self.log.warn('interval-get-timeout', e=e, class_id=self._class_id,
+                              entity_id=self._entity_id, attributes=attributes)
+                self.deferred.errback(failure.Failure(e))
+
+            except Exception as e:
+                self.log.exception('interval-get-failure', e=e, class_id=self._class_id)
+                self.deferred.errback(failure.Failure(e))
+
+        # Successful if here
+        self.deferred.callback(final_results)
diff --git a/python/extensions/omci/tasks/mib_reconcile_task.py b/python/extensions/omci/tasks/mib_reconcile_task.py
new file mode 100644
index 0000000..38e29dc
--- /dev/null
+++ b/python/extensions/omci/tasks/mib_reconcile_task.py
@@ -0,0 +1,693 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from common.utils.asleep import asleep
+from voltha.extensions.omci.tasks.task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, failure, returnValue, TimeoutError
+from voltha.extensions.omci.omci_defs import *
+from voltha.extensions.omci.omci_me import OntDataFrame
+from voltha.extensions.omci.omci_frame import OmciFrame, OmciDelete, OmciCreate, OmciSet
+from voltha.extensions.omci.database.mib_db_api import ATTRIBUTES_KEY
+
+OP = EntityOperations
+RC = ReasonCodes
+AA = AttributeAccess
+
+
+class MibReconcileException(Exception):
+    pass
+
+
+class MibPartialSuccessException(Exception):
+    pass
+
+
+class MibReconcileTask(Task):
+    """
+    OpenOMCI MIB Reconcile Task
+
+    This task attempts to resynchronize the MIB. Note that it runs in exclusive
+    OMCI-CC mode so that it can query the current database/ONU to verify the
+    differences still exist before correcting them.
+    """
+    task_priority = 240
+    name = "MIB Reconcile Task"
+    max_sequential_db_updates = 5   # Be kind, rewind
+    db_update_pause = 0.05          # 50mS
+
+    def __init__(self, omci_agent, device_id, diffs):
+        """
+        Class initialization
+
+        :param omci_agent: (OpenOMCIAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        :param diffs: (dict) Dictionary of what was found to be invalid
+        """
+        super(MibReconcileTask, self).__init__(MibReconcileTask.name,
+                                               omci_agent,
+                                               device_id,
+                                               priority=MibReconcileTask.task_priority,
+                                               exclusive=False)
+        self._local_deferred = None
+        self._diffs = diffs
+        self._device = None
+        self._sync_sm = None
+        self._db_updates = 0    # For tracking sequential blocking consul/etcd updates
+
+    def cancel_deferred(self):
+        super(MibReconcileTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start MIB Reconcile task
+        """
+        super(MibReconcileTask, self).start()
+
+        self._device = self.omci_agent.get_device(self.device_id)
+
+        if self._device is None:
+            e = MibReconcileException('Device {} no longer exists'.format(self.device_id))
+            self.deferred.errback(failure.Failure(e))
+            return
+
+        self._sync_sm = self._device.mib_synchronizer
+
+        if self._device is None:
+            e = MibReconcileException('Device {} MIB State machine no longer exists'.format(self.device_id))
+            self.deferred.errback(failure.Failure(e))
+            return
+
+        self._local_deferred = reactor.callLater(0, self.perform_mib_reconcile)
+
+    def stop(self):
+        """
+        Shutdown MIB Reconcile task
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        self._device = None
+        super(MibReconcileTask, self).stop()
+
+    @inlineCallbacks
+    def perform_mib_reconcile(self):
+        """
+        Perform the MIB Reconciliation sequence.
+
+        The sequence to reconcile will be to clean up ONU only MEs, followed by
+        OLT/OpenOMCI-only MEs, and then finally correct common MEs with differing
+        attributes.
+        """
+        self.log.debug('perform-mib-reconcile')
+
+        try:
+            successes = 0
+            failures = 0
+
+            if self._diffs['onu-only'] is not None and len(self._diffs['onu-only']):
+                results = yield self.fix_onu_only(self._diffs['onu-only'],
+                                                  self._diffs['onu-db'])
+                self.log.debug('onu-only-results', good=results[0], bad=results[1])
+                successes += results[0]
+                failures += results[1]
+
+            if self._diffs['olt-only'] is not None and len(self._diffs['olt-only']):
+                results = yield self.fix_olt_only(self._diffs['olt-only'],
+                                                  self._diffs['onu-db'],
+                                                  self._diffs['olt-db'])
+                self.log.debug('olt-only-results', good=results[0], bad=results[1])
+                successes += results[0]
+                failures += results[1]
+
+            if self._diffs['attributes'] is not None and len(self._diffs['attributes']):
+                results = yield self.fix_attributes_only(self._diffs['attributes'],
+                                                         self._diffs['onu-db'],
+                                                         self._diffs['olt-db'])
+                self.log.debug('attributes-results', good=results[0], bad=results[1])
+                successes += results[0]
+                failures += results[1]
+
+            # Success? Update MIB-data-sync
+            if failures == 0:
+                results = yield self.update_mib_data_sync()
+                successes += results[0]
+                failures += results[1]
+
+            # Send back final status
+            if failures > 0:
+                msg = '{} Successful updates, {} failures'.format(successes, failure)
+                error = MibPartialSuccessException(msg) if successes \
+                    else MibReconcileException(msg)
+                self.deferred.errback(failure.Failure(error))
+            else:
+                self.deferred.callback('{} Successful updates'.format(successes))
+
+        except Exception as e:
+            if not self.deferred.called:
+                self.log.exception('reconcile', e=e)
+                self.deferred.errback(failure.Failure(e))
+
+    @inlineCallbacks
+    def fix_onu_only(self, onu, onu_db):
+        """
+        Fix ME's that were only found on the ONU. For ONU only MEs there are
+        the following things that will be checked.
+
+            o ME's that do not have an OpenOMCI class decoder. These are stored
+              as binary blobs in the MIB database. Since we do not ever set them
+              (since no encoder as well), just store them in the OLT/OpenOMCI MIB
+              Database.
+
+            o For ME's that are created by the ONU (no create/delete access), the
+              MEs 'may' be due to a firmware upgrade and reboot or in response to
+              an OLT creating another ME entity and then creating this ME.  Place
+              these 'new' into the database.
+
+            o For ME's that are created by the OLT/OpenOMCI, delete them from the
+              ONU
+
+        :param onu: (list(int,int)) List of tuples where (class_id, inst_id)
+        :param onu_db: (dict) ONU Database snapshot at time of audit
+
+        :return: (int, int) successes, failures
+        """
+        successes = 0
+        failures = 0
+        me_map = self._device.me_map
+
+        ####################################################################
+        # First the undecodables and onu-created (treated the same)
+        undecodable = self._undecodable(onu, me_map)
+        onu_created = self._onu_created(onu, me_map)
+
+        if len(undecodable) or len(onu_created):
+            results = yield self.fix_onu_only_save_to_db(undecodable, onu_created, onu_db)
+            successes += results[0]
+            failures += results[1]
+
+        ####################################################################
+        # Last the OLT created values, resend these to the ONU
+
+        olt_created = self._olt_created(onu, me_map)
+        if len(olt_created):
+            results = yield self.fix_onu_only_remove_from_onu(olt_created)
+            successes += results[0]
+            failures += results[1]
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def fix_onu_only_save_to_db(self, undecodable, onu_created, onu_db):
+        """
+        In ONU database and needs to be saved to OLT/OpenOMCI database.
+
+        Note that some, perhaps all, of these instances could be ONU create
+        in response to the OLT creating some other ME instance. So treat
+        the Database operation as a create.
+        """
+        successes = 0
+        failures = 0
+
+        for cid, eid in undecodable + onu_created:
+            if self.deferred.called:        # Check if task canceled
+                break
+            try:
+                # If in current MIB, had an audit issue or other MIB operation
+                # put it into the database, declare it a failure so we audit again
+                try:
+                    olt_entry = self._sync_sm.query_mib(class_id=cid, instance_id=eid)
+
+                except KeyError:        # Common for ONU created MEs during audit
+                    olt_entry = None
+
+                if olt_entry is not None and len(olt_entry):
+                    self.log.debug('onu-only-in-current', cid=cid, eid=eid)
+                    failures += 1     # Mark as failure so we audit again
+
+                elif cid not in onu_db:
+                    self.log.warn('onu-only-not-in-audit', cid=cid, eid=eid)
+                    failures += 1
+
+                else:
+                    entry = onu_db[cid][eid]
+                    self.strobe_watchdog()
+                    self._sync_sm.mib_set(cid, eid, entry[ATTRIBUTES_KEY])
+                    successes += 1
+
+                    # If we do nothing but DB updates for ALOT of MEs, we are
+                    # blocking other async twisted tasks, be kind and pause
+                    self._db_updates += 1
+
+                    if self._db_updates >= MibReconcileTask.max_sequential_db_updates:
+                        self._db_updates = 0
+                        self._local_deferred = yield asleep(MibReconcileTask.db_update_pause)
+
+            except Exception as e:
+                self.log.warn('onu-only-error', e=e)
+                failures += 1
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def fix_onu_only_remove_from_onu(self, olt_created,):
+        """ On ONU, but no longer on OLT/OpenOMCI, delete it """
+        successes = 0
+        failures = 0
+
+        for cid, eid in olt_created:
+            if self.deferred.called:        # Check if task canceled
+                break
+            try:
+                # If in current MIB, had an audit issue, declare it an error
+                # and next audit should clear it up
+                try:
+                    current_entry = self._sync_sm.query_mib(class_id=cid, instance_id=eid)
+
+                except KeyError:
+                    # Expected if no other entities with same class present in MIB
+                    current_entry = None
+
+                if current_entry is not None and len(current_entry):
+                    self.log.debug('onu-only-in-current', cid=cid, eid=eid)
+                    failures += 1
+
+                else:
+                    # Delete it from the ONU. Assume success
+                    frame = OmciFrame(transaction_id=None,
+                                      message_type=OmciDelete.message_id,
+                                      omci_message=OmciDelete(entity_class=cid, entity_id=eid))
+
+                    self._local_deferred = yield self._device.omci_cc.send(frame)
+                    self.check_status_and_state(self._local_deferred, 'onu-attribute-update')
+                    successes += 1
+                    self._db_updates = 0
+
+            except Exception as e:
+                self.log.warn('olt-only-error', e=e)
+                failures += 1
+                self.strobe_watchdog()
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def fix_olt_only(self, olt, onu_db, olt_db):
+        """
+        Fix ME's that were only found on the OLT. For OLT only MEs there are
+        the following things that will be checked.
+
+            o ME's that do not have an OpenOMCI class decoder. These are stored
+              as binary blobs in the MIB database. Since the OLT will never
+              create these (all are learned from ONU), it is assumed the ONU
+              has removed them for some purpose. So delete them from the OLT
+              database.
+
+            o For ME's that are created by the ONU (no create/delete access), the
+              MEs 'may' not be on the ONU because of a reboot or an OLT created
+              ME was deleted and the ONU gratuitously removes it.  So delete them
+              from the OLT database.
+
+            o For ME's that are created by the OLT/OpenOMCI, delete them from the
+              ONU
+
+        :param olt: (list(int,int)) List of tuples where (class_id, inst_id)
+        :param onu_db: (dict) ONU Database snapshot at time of audit
+        :param olt_db: (dict) OLT Database snapshot at time of audit
+
+        :return: (int, int) successes, failures
+        """
+        successes = 0
+        failures = 0
+        me_map = self._device.me_map
+
+        ####################################################################
+        # First the undecodables and onu-created (treated the same) remove
+        # from OpenOMCI database
+        undecodable = self._undecodable(olt, me_map)
+        onu_created = self._onu_created(olt, me_map)
+
+        if len(undecodable) or len(onu_created):
+            good, bad = self.fix_olt_only_remove_from_db(undecodable, onu_created)
+            successes += good
+            failures += bad
+
+        ####################################################################
+        # Last the OLT created
+
+        olt_created = self._olt_created(olt, me_map)
+        if len(olt_created):
+            results = yield self.fix_olt_only_create_on_onu(olt_created, me_map)
+            successes += results[0]
+            failures += results[1]
+
+        returnValue((successes, failures))
+
+    def fix_olt_only_remove_from_db(self, undecodable, onu_created):
+        """ On OLT, but not on ONU and are ONU created, delete from OLT/OpenOMCI DB """
+        successes = 0
+        failures = 0
+
+        for cid, eid in undecodable + onu_created:
+            if self.deferred.called:        # Check if task canceled
+                break
+            try:
+                # Delete it. If already deleted (KeyError), then that is okay
+                self._sync_sm.mib_delete(cid, eid)
+                self.strobe_watchdog()
+
+            except KeyError:
+                successes += 1      # Not found in DB anymore, assume success
+
+            except Exception as e:
+                self.log.warn('olt-only-db-error', cid=cid, eid=eid, e=e)
+                failures += 1
+
+        return successes, failures
+
+    @inlineCallbacks
+    def fix_olt_only_create_on_onu(self, olt_created, me_map):
+        """ Found on OLT and created by OLT, so create on ONU"""
+        successes = 0
+        failures = 0
+
+        for cid, eid in olt_created:
+            if self.deferred.called:        # Check if task canceled
+                break
+
+            try:
+                # Get current entry, use it if found
+                olt_entry = self._sync_sm.query_mib(class_id=cid, instance_id=eid)
+                me_entry = me_map[cid]
+
+                if olt_entry is None or len(olt_entry) == 0:
+                    successes += 1      # Deleted before task got to run
+                else:
+                    # Create it in the ONU. Only set-by-create attributes allowed
+                    sbc_data = {k: v for k, v in olt_entry[ATTRIBUTES_KEY].items()
+                                if AA.SetByCreate in
+                                next((attr.access for attr in me_entry.attributes
+                                      if attr.field.name == k), set())}
+
+                    frame = OmciFrame(transaction_id=None,
+                                      message_type=OmciCreate.message_id,
+                                      omci_message=OmciCreate(entity_class=cid,
+                                                              entity_id=eid,
+                                                              data=sbc_data))
+
+                    self._local_deferred = yield self._device.omci_cc.send(frame)
+                    self.check_status_and_state(self._local_deferred, 'olt-create-sbc')
+                    successes += 1
+                    self._db_updates = 0
+
+                    # Try any writeable attributes now (but not set-by-create)
+                    writeable_data = {k: v for k, v in olt_entry[ATTRIBUTES_KEY].items()
+                                      if AA.Writable in
+                                      next((attr.access for attr in me_entry.attributes
+                                            if attr.field.name == k), set())
+                                      and AA.SetByCreate not in
+                                      next((attr.access for attr in me_entry.attributes
+                                            if attr.field.name == k), set())}
+
+                    if len(writeable_data):
+                        attributes_mask = me_entry.mask_for(*writeable_data.keys())
+                        frame = OmciFrame(transaction_id=None,
+                                          message_type=OmciSet.message_id,
+                                          omci_message=OmciSet(entity_class=cid,
+                                                               entity_id=eid,
+                                                               attributes_mask=attributes_mask,
+                                                               data=writeable_data))
+
+                        self._local_deferred = yield self._device.omci_cc.send(frame)
+                        self.check_status_and_state(self._local_deferred, 'olt-set-writeable')
+                        successes += 1
+
+            except Exception as e:
+                self.log.exception('olt-only-fix', e=e, cid=cid, eid=eid)
+                failures += 1
+                self.strobe_watchdog()
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def fix_attributes_only(self, attrs, onu_db, olt_db):
+        """
+        Fix ME's that were found on both the ONU and OLT, but had differing
+        attribute values.  There are several cases to handle here
+
+            o For ME's created on the ONU that have write attributes that
+              only exist in the ONU's database, copy these to the OLT/OpenOMCI
+              database
+
+            o For all other writeable attributes, the OLT value takes precedence
+
+        :param attrs: (list(int,int,str)) List of tuples where (class_id, inst_id, attribute)
+                                          points to the specific ME instance where attributes
+                                          are different
+        :param onu_db: (dict) ONU Database snapshot at time of audit
+        :param olt_db: (dict) OLT Database snapshot at time of audit
+
+        :return: (int, int) successes, failures
+        """
+        successes = 0
+        failures = 0
+        me_map = self._device.me_map
+
+        # Collect up attributes on a per CID/EID basis.  This will result in
+        # the minimal number of operations to either the database of over
+        # the OMCI-CC to the ONU
+
+        attr_map = dict()
+        for cid, eid, attribute in attrs:
+            if (cid, eid) not in attr_map:
+                attr_map[(cid, eid)] = {attribute}
+            else:
+                attr_map[(cid, eid)].add(attribute)
+
+        for entity_pair, attributes in attr_map.items():
+            cid = entity_pair[0]
+            eid = entity_pair[1]
+
+            # Skip MEs we cannot encode/decode
+            if cid not in me_map:
+                self.log.warn('no-me-map-decoder', class_id=cid)
+                failures += 1
+                continue
+
+            if self.deferred.called:        # Check if task canceled
+                break
+
+            # Build up MIB set commands and ONU Set (via OMCI) commands
+            # based of the attributes
+            me_entry = me_map[cid]
+            mib_data_to_save = dict()
+            onu_data_to_set = dict()
+            olt_attributes = olt_db[cid][eid][ATTRIBUTES_KEY]
+            onu_attributes = onu_db[cid][eid][ATTRIBUTES_KEY]
+
+            for attribute in attributes:
+                map_access = next((attr.access for attr in me_entry.attributes
+                                   if attr.field.name == attribute), set())
+                writeable = AA.Writable in map_access or AA.SetByCreate in map_access
+
+                # If only in ONU database snapshot, save it to OLT
+                if attribute in onu_attributes and attribute not in olt_attributes:
+                    # On onu only
+                    mib_data_to_save[attribute] = onu_attributes[attribute]
+
+                elif writeable:
+                    # On olt only or in both. Either way OLT wins
+                    onu_data_to_set[attribute] = olt_attributes[attribute]
+
+            # Now do the bulk operations For both, check to see if the target
+            # is still the same as when the audit was performed. If it is, do
+            # the commit.  If not, mark as a failure so an expedited audit will
+            # occur and check again.
+
+            if len(mib_data_to_save):
+                results = yield self.fix_attributes_only_in_mib(cid, eid, mib_data_to_save)
+                successes += results[0]
+                failures += results[1]
+
+            if len(onu_data_to_set):
+                results = yield self.fix_attributes_only_on_olt(cid, eid, onu_data_to_set, olt_db, me_entry)
+                successes += results[0]
+                failures += results[1]
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def fix_attributes_only_in_mib(self, cid, eid, mib_data):
+        successes = 0
+        failures = 0
+        try:
+            # Get current and verify same as during audit it is missing from our DB
+            attributes = mib_data.keys()
+            current_entry = self._device.query_mib(cid, eid, attributes)
+
+            if current_entry is not None and len(current_entry):
+                clashes = {k: v for k, v in current_entry.items()
+                           if k in attributes and v != mib_data[k]}
+
+                if len(clashes):
+                    raise ValueError('Existing DB entry for {}/{} attributes clash with audit data. Clash: {}'.
+                                     format(cid, eid, clashes))
+
+            self._sync_sm.mib_set(cid, eid, mib_data)
+            successes += len(mib_data)
+            self.strobe_watchdog()
+
+            # If we do nothing but DB updates for ALOT of MEs, we are
+            # blocking other async twisted tasks, be kind and yield
+            self._db_updates += 1
+            if self._db_updates >= MibReconcileTask.max_sequential_db_updates:
+                self._db_updates = 0
+                self._local_deferred = yield asleep(MibReconcileTask.db_update_pause)
+
+        except ValueError as e:
+            self.log.debug('attribute-changed', e)
+            failures += len(mib_data)
+
+        except Exception as e:
+            self.log.exception('attribute-only-fix-mib', e=e, cid=cid, eid=eid)
+            failures += len(mib_data)
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def fix_attributes_only_on_olt(self, cid, eid, onu_data, olt_db, me_entry):
+        successes = 0
+        failures = 0
+
+        try:
+            # On olt only or in both. Either way OLT wins, first verify that
+            # the OLT version is still the same data that we want to
+            # update on the ONU. Verify the data for the OLT is the same as
+            # at time of audit
+            olt_db_entries = {k: v for k, v in olt_db[cid][eid][ATTRIBUTES_KEY].items()
+                              if k in onu_data.keys()}
+            current_entries = self._sync_sm.query_mib(class_id=cid, instance_id=eid,
+                                                      attributes=onu_data.keys())
+
+            still_the_same = all(current_entries.get(k) == v for k, v in olt_db_entries.items())
+            if not still_the_same:
+                returnValue((0, len(onu_data)))    # Wait for it to stabilize
+
+            # OLT data still matches, do the set operations now
+            # while len(onu_data):
+            attributes_mask = me_entry.mask_for(*onu_data.keys())
+            frame = OmciFrame(transaction_id=None,
+                              message_type=OmciSet.message_id,
+                              omci_message=OmciSet(entity_class=cid,
+                                                   entity_id=eid,
+                                                   attributes_mask=attributes_mask,
+                                                   data=onu_data))
+
+            results = yield self._device.omci_cc.send(frame)
+            self.check_status_and_state(results, 'onu-attribute-update')
+            successes += len(onu_data)
+            self._db_updates = 0
+
+        except Exception as e:
+            self.log.exception('attribute-only-fix-onu', e=e, cid=cid, eid=eid)
+            failures += len(onu_data)
+            self.strobe_watchdog()
+
+        returnValue((successes, failures))
+
+    @inlineCallbacks
+    def update_mib_data_sync(self):
+        """
+        As the final step of MIB resynchronization, the OLT sets the MIB data sync
+        attribute of the ONU data ME to some suitable value of its own choice. It
+        then sets its own record of the same attribute to the same value,
+        incremented by 1, as explained in clause
+
+        :return: (int, int) success, failure counts
+        """
+        # Get MDS to set, do not user zero
+
+        new_mds_value = self._sync_sm.mib_data_sync
+        if new_mds_value == 0:
+            self._sync_sm.increment_mib_data_sync()
+            new_mds_value = self._sync_sm.mib_data_sync
+
+        # Update it.  The set response will be sent on the OMCI-CC pub/sub bus
+        # and the MIB Synchronizer will update this MDS value in the database
+        # if successful.
+        try:
+            frame = OntDataFrame(mib_data_sync=new_mds_value).set()
+
+            results = yield self._device.omci_cc.send(frame)
+            self.check_status_and_state(results, 'ont-data-mbs-update')
+            returnValue((1, 0))
+
+        except TimeoutError as e:
+            self.log.debug('ont-data-send-timeout', e=e)
+            returnValue((0, 1))
+
+        except Exception as e:
+            self.log.exception('ont-data-send', e=e, mds=new_mds_value)
+            returnValue((0, 1))
+
+    def check_status_and_state(self, results, operation=''):
+        """
+        Check the results of an OMCI response.  An exception is thrown
+        if the task was cancelled or an error was detected.
+
+        :param results: (OmciFrame) OMCI Response frame
+        :param operation: (str) what operation was being performed
+        :return: True if successful, False if the entity existed (already created)
+        """
+        omci_msg = results.fields['omci_message'].fields
+        status = omci_msg['success_code']
+        error_mask = omci_msg.get('parameter_error_attributes_mask', 'n/a')
+        failed_mask = omci_msg.get('failed_attributes_mask', 'n/a')
+        unsupported_mask = omci_msg.get('unsupported_attributes_mask', 'n/a')
+        self.strobe_watchdog()
+
+        self.log.debug(operation, status=status, error_mask=error_mask,
+                       failed_mask=failed_mask, unsupported_mask=unsupported_mask)
+
+        if status == RC.Success:
+            return True
+
+        elif status == RC.InstanceExists:
+            return False
+
+        msg = '{} failed with a status of {}, error_mask: {}, failed_mask: {}, unsupported_mask: {}'.\
+            format(operation, status, error_mask, failed_mask, unsupported_mask)
+
+        raise MibReconcileException(msg)
+
+    def _undecodable(self, cid_eid_list, me_map):
+        return [(cid, eid) for cid, eid in cid_eid_list if cid not in me_map]
+
+    def _onu_created(self, cid_eid_list, me_map):
+        return [(cid, eid) for cid, eid in cid_eid_list if cid in me_map and
+                (OP.Create not in me_map[cid].mandatory_operations and
+                 OP.Create not in me_map[cid].optional_operations)]
+
+    def _olt_created(self, cid_eid_list, me_map):
+        return [(cid, eid) for cid, eid in cid_eid_list if cid in me_map and
+                (OP.Create in me_map[cid].mandatory_operations or
+                 OP.Create in me_map[cid].optional_operations)]
diff --git a/python/extensions/omci/tasks/mib_resync_task.py b/python/extensions/omci/tasks/mib_resync_task.py
new file mode 100644
index 0000000..ef9c531
--- /dev/null
+++ b/python/extensions/omci/tasks/mib_resync_task.py
@@ -0,0 +1,427 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure, returnValue
+from twisted.internet import reactor
+from common.utils.asleep import asleep
+from voltha.extensions.omci.database.mib_db_dict import *
+from voltha.extensions.omci.omci_entities import OntData
+from voltha.extensions.omci.omci_defs import AttributeAccess, EntityOperations
+
+AA = AttributeAccess
+OP = EntityOperations
+
+class MibCopyException(Exception):
+    pass
+
+
+class MibDownloadException(Exception):
+    pass
+
+
+class MibResyncException(Exception):
+    pass
+
+
+class MibResyncTask(Task):
+    """
+    OpenOMCI MIB resynchronization Task
+
+    This task should get a copy of the MIB and compare compare it to a
+    copy of the database. When the MIB Upload command is sent to the ONU,
+    it should make a copy and source the data requested from this database.
+    The ONU can still source AVC's and the the OLT can still send config
+    commands to the actual.
+    """
+    task_priority = 240
+    name = "MIB Resynchronization Task"
+
+    max_db_copy_retries = 3
+    db_copy_retry_delay = 7
+
+    max_mib_upload_next_retries = 3
+    mib_upload_next_delay = 10          # Max * delay < 60 seconds
+    watchdog_timeout = 15               # Should be > max delay
+
+    def __init__(self, omci_agent, device_id):
+        """
+        Class initialization
+
+        :param omci_agent: (OpenOMCIAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        """
+        super(MibResyncTask, self).__init__(MibResyncTask.name,
+                                            omci_agent,
+                                            device_id,
+                                            priority=MibResyncTask.task_priority,
+                                            exclusive=False)
+        self._local_deferred = None
+        self._device = omci_agent.get_device(device_id)
+        self._db_active = MibDbVolatileDict(omci_agent)
+        self._db_active.start()
+
+    def cancel_deferred(self):
+        super(MibResyncTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start MIB Re-Synchronization task
+        """
+        super(MibResyncTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_mib_resync)
+        self._db_active.start()
+        self._db_active.add(self.device_id)
+
+    def stop(self):
+        """
+        Shutdown MIB Re-Synchronization task
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        self._device = None
+        self._db_active.stop()
+        self._db_active = None
+        super(MibResyncTask, self).stop()
+
+    @inlineCallbacks
+    def perform_mib_resync(self):
+        """
+        Perform the MIB Resynchronization sequence
+
+        The sequence to be performed is:
+            - get a copy of the current MIB database (db_copy)
+
+            - perform MIB upload commands to get ONU's database and save this
+              to a local DB (db_active). Note that the ONU can still receive
+              create/delete/set/get operations from the operator and source
+              AVC notifications as well during this period.
+
+            - Compare the information in the db_copy to the db_active
+
+        During the mib upload process, the maximum time between mib upload next
+        requests is 1 minute.
+        """
+        self.log.debug('perform-mib-resync')
+
+        try:
+            results = yield self.snapshot_mib()
+            db_copy = results[0]
+
+            if db_copy is None:
+                e = MibCopyException('Failed to get local database copy')
+                self.deferred.errback(failure.Failure(e))
+
+            else:
+                number_of_commands = results[1]
+
+                # Start the MIB upload sequence
+                self.strobe_watchdog()
+                commands_retrieved = yield self.upload_mib(number_of_commands)
+
+                if commands_retrieved < number_of_commands:
+                    e = MibDownloadException('Only retrieved {} of {} instances'.
+                                             format(commands_retrieved, number_of_commands))
+                    self.deferred.errback(failure.Failure(e))
+                else:
+                    # Compare the databases
+                    active_copy = self._db_active.query(self.device_id)
+                    on_olt_only, on_onu_only, attr_diffs = \
+                        self.compare_mibs(db_copy, active_copy)
+
+                    self.deferred.callback(
+                            {
+                                'on-olt-only': on_olt_only if len(on_olt_only) else None,
+                                'on-onu-only': on_onu_only if len(on_onu_only) else None,
+                                'attr-diffs': attr_diffs if len(attr_diffs) else None,
+                                'olt-db': db_copy,
+                                'onu-db': active_copy
+                            })
+
+        except Exception as e:
+            self.log.exception('resync', e=e)
+            self.deferred.errback(failure.Failure(e))
+
+    @inlineCallbacks
+    def snapshot_mib(self):
+        """
+        Snapshot the MIB on the ONU and create a copy of our local MIB database
+
+        :return: (pair) (db_copy, number_of_commands)
+        """
+        db_copy = None
+        number_of_commands = None
+
+        try:
+            max_tries = MibResyncTask.max_db_copy_retries - 1
+
+            for retries in xrange(0, max_tries + 1):
+                # Send MIB Upload so ONU snapshots its MIB
+                try:
+                    self.strobe_watchdog()
+                    number_of_commands = yield self.send_mib_upload()
+
+                    if number_of_commands is None:
+                        if retries >= max_tries:
+                            db_copy = None
+                            break
+
+                except (TimeoutError, ValueError) as e:
+                    self.log.warn('timeout-or-value-error', e=e)
+                    if retries >= max_tries:
+                        raise
+
+                    self.strobe_watchdog()
+                    yield asleep(MibResyncTask.db_copy_retry_delay)
+                    continue
+
+                # Get a snapshot of the local MIB database
+                db_copy = self._device.query_mib()
+                # if we made it this far, no need to keep trying
+                break
+
+        except Exception as e:
+            self.log.exception('mib-resync', e=e)
+            raise
+
+        # Handle initial failures
+
+        if db_copy is None or number_of_commands is None:
+            raise MibCopyException('Failed to snapshot MIB copy after {} retries'.
+                                   format(MibResyncTask.max_db_copy_retries))
+
+        returnValue((db_copy, number_of_commands))
+
+    @inlineCallbacks
+    def send_mib_upload(self):
+        """
+        Perform MIB upload command and get the number of entries to retrieve
+
+        :return: (int) Number of commands to execute or None on error
+        """
+        ########################################
+        # Begin MIB Upload
+        try:
+            self.strobe_watchdog()
+            results = yield self._device.omci_cc.send_mib_upload()
+
+            number_of_commands = results.fields['omci_message'].fields['number_of_commands']
+
+            if number_of_commands is None or number_of_commands <= 0:
+                raise ValueError('Number of commands was {}'.format(number_of_commands))
+
+            returnValue(number_of_commands)
+
+        except TimeoutError as e:
+            self.log.warn('mib-resync-get-timeout', e=e)
+            raise
+
+    @inlineCallbacks
+    def upload_mib(self, number_of_commands):
+        ########################################
+        # Begin MIB Upload
+        seq_no = None
+
+        for seq_no in xrange(number_of_commands):
+            max_tries = MibResyncTask.max_mib_upload_next_retries
+
+            for retries in xrange(0, max_tries):
+                try:
+                    self.strobe_watchdog()
+                    response = yield self._device.omci_cc.send_mib_upload_next(seq_no)
+
+                    omci_msg = response.fields['omci_message'].fields
+                    class_id = omci_msg['object_entity_class']
+                    entity_id = omci_msg['object_entity_id']
+
+                    # Filter out the 'mib_data_sync' from the database. We save that at
+                    # the device level and do not want it showing up during a re-sync
+                    # during data comparison
+                    from binascii import hexlify
+                    if class_id == OntData.class_id:
+                        break
+
+                    # The T&W ONU reports an ME with class ID 0 but only on audit. Perhaps others do as well.
+                    if class_id == 0 or class_id > 0xFFFF:
+                        self.log.warn('invalid-class-id', class_id=class_id)
+                        break
+
+                    attributes = {k: v for k, v in omci_msg['object_data'].items()}
+
+                    # Save to the database
+                    self._db_active.set(self.device_id, class_id, entity_id, attributes)
+                    break
+
+                except TimeoutError:
+                    self.log.warn('mib-resync-timeout', seq_no=seq_no,
+                                  number_of_commands=number_of_commands)
+
+                    if retries < max_tries - 1:
+                        self.strobe_watchdog()
+                        yield asleep(MibResyncTask.mib_upload_next_delay)
+                    else:
+                        raise
+
+                except Exception as e:
+                    self.log.exception('resync', e=e, seq_no=seq_no,
+                                       number_of_commands=number_of_commands)
+
+        returnValue(seq_no + 1)     # seq_no is zero based.
+
+    def compare_mibs(self, db_copy, db_active):
+        """
+        Compare the our db_copy with the ONU's active copy
+
+        :param db_copy: (dict) OpenOMCI's copy of the database
+        :param db_active: (dict) ONU's database snapshot
+        :return: (dict), (dict), (list)  Differences
+        """
+        self.strobe_watchdog()
+        me_map = self.omci_agent.get_device(self.device_id).me_map
+
+        # Class & Entities only in local copy (OpenOMCI)
+        on_olt_temp = self.get_lhs_only_dict(db_copy, db_active)
+
+        # Remove any entries that are not reported during an upload (but could
+        # be in our database copy. Retain undecodable class IDs.
+        on_olt_only = [(cid, eid) for cid, eid in on_olt_temp
+                       if cid not in me_map or not me_map[cid].hidden]
+
+        # Further reduce the on_olt_only MEs reported in an audit to not
+        # include missed MEs that are ONU created. Not all ONUs report MEs
+        # that are ONU created unless we are doing the initial MIB upload.
+        # Adtran does report them, T&W may not as well as a few others
+        on_olt_only = [(cid, eid) for cid, eid in on_olt_only if cid in me_map and
+                       (OP.Create in me_map[cid].mandatory_operations or
+                        OP.Create in me_map[cid].optional_operations)]
+
+        # Class & Entities only on remote (ONU)
+        on_onu_only = self.get_lhs_only_dict(db_active, db_copy)
+
+        # Class & Entities on both local & remote, but one or more attributes
+        # are different on the ONU.  This is the value that the local (OpenOMCI)
+        # thinks should be on the remote (ONU)
+
+        attr_diffs = self.get_attribute_diffs(db_copy, db_active, me_map)
+
+        # TODO: Note that certain MEs are excluded from the MIB upload.  In particular,
+        #       instances of some general purpose MEs, such as the Managed Entity ME and
+        #       and the Attribute ME are not included in the MIB upload.  Also all table
+        #       attributes are not included in the MIB upload (but we do not yet support
+        #       tables in this OpenOMCI implementation (VOLTHA v1.3.0)
+
+        return on_olt_only, on_onu_only, attr_diffs
+
+    def get_lhs_only_dict(self, lhs, rhs):
+        """
+        Compare two MIB database dictionaries and return the ME Class ID and
+        instances that are unique to the lhs dictionary. Both parameters
+        should be in the common MIB Database output dictionary format that
+        is returned by the mib 'query' command.
+
+        :param lhs: (dict) Left-hand-side argument.
+        :param rhs: (dict) Right-hand-side argument
+
+        return: (list(int,int)) List of tuples where (class_id, inst_id)
+        """
+        results = list()
+
+        for cls_id, cls_data in lhs.items():
+            # Get unique classes
+            #
+            # Skip keys that are not class IDs
+            if not isinstance(cls_id, int):
+                continue
+
+            if cls_id not in rhs:
+                results.extend([(cls_id, inst_id) for inst_id in cls_data.keys()
+                                if isinstance(inst_id, int)])
+            else:
+                # Get unique instances of a class
+                lhs_cls = cls_data
+                rhs_cls = rhs[cls_id]
+
+                for inst_id, _ in lhs_cls.items():
+                    # Skip keys that are not instance IDs
+                    if isinstance(cls_id, int) and inst_id not in rhs_cls:
+                        results.extend([(cls_id, inst_id)])
+
+        return results
+
+    def get_attribute_diffs(self, omci_copy, onu_copy, me_map):
+        """
+        Compare two OMCI MIBs and return the ME class and instance IDs that exists
+        on both the local copy and the remote ONU that have different attribute
+        values. Both parameters should be in the common MIB Database output
+        dictionary format that is returned by the mib 'query' command.
+
+        :param omci_copy: (dict) OpenOMCI copy (OLT-side) of the MIB Database
+        :param onu_copy: (dict) active ONU latest copy its database
+        :param me_map: (dict) ME Class ID MAP for this ONU
+
+        return: (list(int,int,str)) List of tuples where (class_id, inst_id, attribute)
+                                    points to the specific ME instance where attributes
+                                    are different
+        """
+        results = list()
+        ro_set = {AA.R}
+
+        # Get class ID's that are in both
+        class_ids = {cls_id for cls_id, _ in omci_copy.items()
+                     if isinstance(cls_id, int) and cls_id in onu_copy}
+
+        for cls_id in class_ids:
+            # Get unique instances of a class
+            olt_cls = omci_copy[cls_id]
+            onu_cls = onu_copy[cls_id]
+
+            # Weed out read-only attributes. Attributes on onu may be read-only. These
+            # will only show up it the OpenOMCI (OLT-side) database if it changed and
+            # an AVC Notification was sourced by the ONU
+            # TODO: These class IDs could be calculated once at ONU startup (at device add)
+            if cls_id in me_map:
+                ro_attrs = {attr.field.name for attr in me_map[cls_id].attributes
+                            if attr.access == ro_set}
+            else:
+                # Here if partially defined ME (not defined in ME Map)
+                from voltha.extensions.omci.omci_cc import UNKNOWN_CLASS_ATTRIBUTE_KEY
+                ro_attrs = {UNKNOWN_CLASS_ATTRIBUTE_KEY}
+
+            # Get set of common instance IDs
+            inst_ids = {inst_id for inst_id, _ in olt_cls.items()
+                        if isinstance(inst_id, int) and inst_id in onu_cls}
+
+            for inst_id in inst_ids:
+                omci_attributes = {k for k in olt_cls[inst_id][ATTRIBUTES_KEY].iterkeys()}
+                onu_attributes = {k for k in onu_cls[inst_id][ATTRIBUTES_KEY].iterkeys()}
+
+                # Get attributes that exist in one database, but not the other
+                sym_diffs = (omci_attributes ^ onu_attributes) - ro_attrs
+                results.extend([(cls_id, inst_id, attr) for attr in sym_diffs])
+
+                # Get common attributes with different values
+                common_attributes = (omci_attributes & onu_attributes) - ro_attrs
+                results.extend([(cls_id, inst_id, attr) for attr in common_attributes
+                               if olt_cls[inst_id][ATTRIBUTES_KEY][attr] !=
+                                onu_cls[inst_id][ATTRIBUTES_KEY][attr]])
+        return results
diff --git a/python/extensions/omci/tasks/mib_upload.py b/python/extensions/omci/tasks/mib_upload.py
new file mode 100644
index 0000000..4afd234
--- /dev/null
+++ b/python/extensions/omci/tasks/mib_upload.py
@@ -0,0 +1,158 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure, AlreadyCalledError
+from twisted.internet import reactor
+from voltha.extensions.omci.omci_defs import ReasonCodes
+
+
+class MibUploadFailure(Exception):
+    """
+    This error is raised by default when the upload fails
+    """
+
+
+class MibUploadTask(Task):
+    """
+    OpenOMCI MIB upload task
+
+    On successful completion, this task will call the 'callback' method of the
+    deferred returned by the start method. Only a textual message is provided as
+    the successful results and it lists the number of ME entities successfully
+    retrieved.
+
+    Note that the MIB Synchronization State Machine will get event subscription
+    information for the MIB Reset and MIB Upload Next requests and it is the
+    MIB Synchronization State Machine that actually populates the MIB Database.
+    """
+    task_priority = 250
+    name = "MIB Upload Task"
+
+    def __init__(self, omci_agent, device_id):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        """
+        super(MibUploadTask, self).__init__(MibUploadTask.name,
+                                            omci_agent,
+                                            device_id,
+                                            priority=MibUploadTask.task_priority)
+        self._local_deferred = None
+
+    def cancel_deferred(self):
+        super(MibUploadTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start MIB Synchronization tasks
+        """
+        super(MibUploadTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_mib_upload)
+
+    def stop(self):
+        """
+        Shutdown MIB Synchronization tasks
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        super(MibUploadTask, self).stop()
+
+    @inlineCallbacks
+    def perform_mib_upload(self):
+        """
+        Perform the MIB Upload sequence
+        """
+        self.log.debug('perform-mib-upload')
+
+        seq_no = 0
+        number_of_commands = 0
+
+        try:
+            device = self.omci_agent.get_device(self.device_id)
+
+            #########################################
+            # MIB Reset
+            self.strobe_watchdog()
+            results = yield device.omci_cc.send_mib_reset()
+
+            status = results.fields['omci_message'].fields['success_code']
+            if status != ReasonCodes.Success.value:
+                raise MibUploadFailure('MIB Reset request failed with status code: {}'.
+                                       format(status))
+
+            ########################################
+            # Begin MIB Upload
+            self.strobe_watchdog()
+            results = yield device.omci_cc.send_mib_upload()
+
+            number_of_commands = results.fields['omci_message'].fields['number_of_commands']
+
+            for seq_no in xrange(number_of_commands):
+                if not device.active or not device.omci_cc.enabled:
+                    raise MibUploadFailure('OMCI and/or ONU is not active')
+
+                for retry in range(0, 3):
+                    try:
+                        self.log.debug('mib-upload-next-request', seq_no=seq_no,
+                                       retry=retry,
+                                       number_of_commands=number_of_commands)
+                        self.strobe_watchdog()
+                        yield device.omci_cc.send_mib_upload_next(seq_no)
+
+                        self.log.debug('mib-upload-next-success', seq_no=seq_no,
+                                       number_of_commands=number_of_commands)
+                        break
+
+                    except TimeoutError as e:
+                        from common.utils.asleep import asleep
+                        self.log.warn('mib-upload-timeout', e=e, seq_no=seq_no,
+                                      number_of_commands=number_of_commands)
+                        if retry >= 2:
+                            raise MibUploadFailure('Upload timeout failure on req {} of {}'.
+                                                   format(seq_no + 1, number_of_commands))
+                        self.strobe_watchdog()
+                        yield asleep(0.3)
+
+            # Successful if here
+            self.log.info('mib-synchronized')
+            self.deferred.callback('success, loaded {} ME Instances'.
+                                   format(number_of_commands))
+
+        except TimeoutError as e:
+            self.log.warn('mib-upload-timeout-on-reset', e=e, seq_no=seq_no,
+                          number_of_commands=number_of_commands)
+            self.deferred.errback(failure.Failure(e))
+
+        except AlreadyCalledError:
+            # Can occur if task canceled due to MIB Sync state change
+            self.log.debug('already-called-exception', seq_no=seq_no,
+                           number_of_commands=number_of_commands)
+            assert self.deferred.called, \
+                'Unexpected AlreadyCalledError exception: seq: {} of {}'.format(seq_no,
+                                                                                number_of_commands)
+        except Exception as e:
+            self.log.exception('mib-upload', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/omci_create_pm_task.py b/python/extensions/omci/tasks/omci_create_pm_task.py
new file mode 100644
index 0000000..355e26a
--- /dev/null
+++ b/python/extensions/omci/tasks/omci_create_pm_task.py
@@ -0,0 +1,150 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, failure, TimeoutError
+from voltha.extensions.omci.omci_defs import ReasonCodes, EntityOperations
+from voltha.extensions.omci.omci_frame import OmciFrame
+from voltha.extensions.omci.omci_messages import OmciCreate
+
+RC = ReasonCodes
+OP = EntityOperations
+
+
+class CreatePMException(Exception):
+    pass
+
+
+class OmciCreatePMRequest(Task):
+    """
+    OpenOMCI routine to create the requested PM Interval MEs
+
+    TODO: Support of thresholding crossing alarms will be in a future VOLTHA release
+    """
+    task_priority = Task.DEFAULT_PRIORITY
+    name = "ONU OMCI Create PM ME Task"
+
+    def __init__(self, omci_agent, device_id, me_dict, exclusive=False):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param me_dict: (dict) (pm cid, pm eid) -> (me cid, me eid, upstream)
+        :param exclusive: (bool) True if this Create request Task exclusively own the
+                                 OMCI-CC while running. Default: False
+        """
+        super(OmciCreatePMRequest, self).__init__(OmciCreatePMRequest.name,
+                                                  omci_agent,
+                                                  device_id,
+                                                  priority=OmciCreatePMRequest.task_priority,
+                                                  exclusive=exclusive)
+        self._device = omci_agent.get_device(device_id)
+        self._me_dict = me_dict
+        self._local_deferred = None
+
+    def cancel_deferred(self):
+        super(OmciCreatePMRequest, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """ Start task """
+        super(OmciCreatePMRequest, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_create)
+
+    @inlineCallbacks
+    def perform_create(self):
+        """ Perform the create requests """
+
+        try:
+            for pm, me in self._me_dict.items():
+                pm_class_id = pm[0]
+                pm_entity_id = pm[1]
+                me_class_id = me[0]
+                me_entity_id = me[1]
+                upstream = me[2]
+                self.log.debug('create-pm-me', class_id=pm_class_id, entity_id=pm_entity_id)
+
+                if me_class_id == 0:
+                    # Typical/common PM interval format
+                    frame = OmciFrame(
+                        transaction_id=None,  # OMCI-CC will set
+                        message_type=OmciCreate.message_id,
+                        omci_message=OmciCreate(
+                            entity_class=pm_class_id,
+                            entity_id=pm_entity_id,
+                            data=dict()
+                        )
+                    )
+                else:
+                    # Extended PM interval format. See ITU-T G.988 Section 9.3.32.
+                    #    Bit 1 - continuous accumulation if set, 15-minute interval if unset
+                    #    Bit 2 - directionality (0=upstream, 1=downstream)
+                    #    Bit 3..14 - Reserved
+                    #    Bit 15 - Use P bits of TCI field to filter
+                    #    Bit 16 - Use VID bits of TCI field to filter
+                    bitmap = 0 if upstream else 1 << 1
+
+                    data = {'control_block': [
+                        0,             # Threshold data 1/2 ID
+                        me_class_id,   # Parent ME Class
+                        me_entity_id,  # Parent ME Instance
+                        0,             # Accumulation disable
+                        0,             # TCA Disable
+                        bitmap,        # Control fields bitmap
+                        0,             # TCI
+                        0              # Reserved
+                    ]}
+                    frame = OmciFrame(
+                        transaction_id=None,  # OMCI-CC will set
+                        message_type=OmciCreate.message_id,
+                        omci_message=OmciCreate(
+                            entity_class=pm_class_id,
+                            entity_id=pm_entity_id,
+                            data=data
+                        )
+                    )
+                self.strobe_watchdog()
+                try:
+                    results = yield self._device.omci_cc.send(frame)
+                except TimeoutError:
+                    self.log.warning('perform-create-timeout', me_class_id=me_class_id, me_entity_id=me_entity_id,
+                                     pm_class_id=pm_class_id, pm_entity_id=pm_entity_id)
+                    raise
+
+                status = results.fields['omci_message'].fields['success_code']
+                self.log.debug('perform-create-status', status=status)
+
+                # Did it fail
+                if status != RC.Success.value and status != RC.InstanceExists.value:
+                    msg = 'ME: {}, entity: {} failed with status {}'.format(pm_class_id,
+                                                                            pm_entity_id,
+                                                                            status)
+                    raise CreatePMException(msg)
+
+                self.log.debug('create-pm-success', class_id=pm_class_id,
+                               entity_id=pm_entity_id)
+
+            self.deferred.callback(self)
+
+        except Exception as e:
+            self.log.exception('perform-create', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/omci_delete_pm_task.py b/python/extensions/omci/tasks/omci_delete_pm_task.py
new file mode 100644
index 0000000..adf1ce2
--- /dev/null
+++ b/python/extensions/omci/tasks/omci_delete_pm_task.py
@@ -0,0 +1,108 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, failure
+from voltha.extensions.omci.omci_defs import ReasonCodes, EntityOperations
+from voltha.extensions.omci.omci_frame import OmciFrame
+from voltha.extensions.omci.omci_messages import OmciDelete
+
+RC = ReasonCodes
+OP = EntityOperations
+
+
+class DeletePMException(Exception):
+    pass
+
+
+class OmciDeletePMRequest(Task):
+    """
+    OpenOMCI routine to delete the requested PM Interval MEs
+    """
+    task_priority = Task.DEFAULT_PRIORITY
+    name = "ONU OMCI Delete PM ME Task"
+
+    def __init__(self, omci_agent, device_id, me_set, exclusive=False):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param me_set: (set) Tuples of class_id / entity_id to create
+        :param exclusive: (bool) True if this Create request Task exclusively own the
+                                 OMCI-CC while running. Default: False
+        """
+        super(OmciDeletePMRequest, self).__init__(OmciDeletePMRequest.name,
+                                                  omci_agent,
+                                                  device_id,
+                                                  priority=OmciDeletePMRequest.task_priority,
+                                                  exclusive=exclusive)
+        self._device = omci_agent.get_device(device_id)
+        self._me_tuples = me_set
+        self._local_deferred = None
+
+    def cancel_deferred(self):
+        super(OmciDeletePMRequest, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """ Start task """
+        super(OmciDeletePMRequest, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_delete)
+
+    @inlineCallbacks
+    def perform_delete(self):
+        """ Perform the delete requests """
+        self.log.debug('perform-delete')
+
+        try:
+            for me in self._me_tuples:
+                class_id = me[0]
+                entity_id = me[1]
+
+                frame = OmciFrame(
+                    transaction_id=None,
+                    message_type=OmciDelete.message_id,
+                    omci_message=OmciDelete(
+                        entity_class=class_id,
+                        entity_id=entity_id
+                    )
+                )
+                self.strobe_watchdog()
+                results = yield self._device.omci_cc.send(frame)
+
+                status = results.fields['omci_message'].fields['success_code']
+                self.log.debug('perform-delete-status', status=status)
+
+                # Did it fail, it instance does not exist, not an error
+                if status != RC.Success.value and status != RC.UnknownInstance.value:
+                    msg = 'ME: {}, entity: {} failed with status {}'.format(class_id,
+                                                                            entity_id,
+                                                                            status)
+                    raise DeletePMException(msg)
+
+                self.log.debug('delete-pm-success', class_id=class_id,
+                               entity_id=entity_id)
+            self.deferred.callback(self)
+
+        except Exception as e:
+            self.log.exception('perform-create', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/omci_get_request.py b/python/extensions/omci/tasks/omci_get_request.py
new file mode 100644
index 0000000..690df1c
--- /dev/null
+++ b/python/extensions/omci/tasks/omci_get_request.py
@@ -0,0 +1,356 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import failure, inlineCallbacks, TimeoutError, returnValue
+from voltha.extensions.omci.omci_defs import ReasonCodes, EntityOperations
+from voltha.extensions.omci.omci_me import MEFrame
+from voltha.extensions.omci.omci_frame import OmciFrame
+from voltha.extensions.omci.omci_cc import DEFAULT_OMCI_TIMEOUT
+from voltha.extensions.omci.omci_messages import OmciGet
+from voltha.extensions.omci.omci_fields import OmciTableField
+
+RC = ReasonCodes
+OP = EntityOperations
+
+
+class GetException(Exception):
+    pass
+
+
+class OmciGetRequest(Task):
+    """
+    OpenOMCI Get an OMCI ME Instance Attributes
+
+    Upon completion, the Task deferred callback is invoked with a reference of
+    this Task object.
+
+    The Task has an initializer option (allow_failure) that will retry all
+    requested attributes if the original request fails with a status code of
+    9 (Attributes failed or unknown). This result means that an attribute
+    is not supported by the ONU or that a mandatory/optional attribute could
+    not be executed by the ONU, even if it is supported, for example,
+    because of a range or type violation.
+    """
+    task_priority = 128
+    name = "ONU OMCI Get Task"
+
+    def __init__(self, omci_agent, device_id, entity_class, entity_id, attributes,
+                 exclusive=True, allow_failure=False):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        :param entity_class: (EntityClass) ME Class to retrieve
+        :param entity_id: (int) ME Class instance ID to retrieve
+        :param attributes: (list or set) Name of attributes to retrieve
+        :param exclusive: (bool) True if this GET request Task exclusively own the
+                                 OMCI-CC while running. Default: True
+        :param allow_failure: (bool) If true, attempt to get all valid attributes
+                                     if the original request receives an error
+                                     code of 9 (Attributes failed or unknown).
+        """
+        super(OmciGetRequest, self).__init__(OmciGetRequest.name,
+                                             omci_agent,
+                                             device_id,
+                                             priority=OmciGetRequest.task_priority,
+                                             exclusive=exclusive)
+        self._device = omci_agent.get_device(device_id)
+        self._entity_class = entity_class
+        self._entity_id = entity_id
+        self._attributes = attributes
+        self._allow_failure = allow_failure
+        self._failed_or_unknown_attributes = set()
+        self._results = None
+        self._local_deferred = None
+
+    def cancel_deferred(self):
+        super(OmciGetRequest, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    @property
+    def me_class(self):
+        """The OMCI Managed Entity Class associated with this request"""
+        return self._entity_class
+
+    @property
+    def entity_id(self):
+        """The ME Entity ID associated with this request"""
+        return self._entity_id
+
+    @property
+    def attributes(self):
+        """
+        Return a dictionary of attributes for the request if the Get was
+        successfully completed.  None otherwise
+        """
+        if self._results is None:
+            return None
+
+        omci_msg = self._results.fields['omci_message'].fields
+        return omci_msg['data'] if 'data' in omci_msg else None
+
+    @property
+    def success_code(self):
+        """
+        Return the OMCI success/reason code for the Get Response.
+        """
+        if self._results is None:
+            return None
+
+        return self._results.fields['omci_message'].fields['success_code']
+
+    @property
+    def raw_results(self):
+        """
+        Return the raw Get Response OMCIFrame
+        """
+        return self._results
+
+    def start(self):
+        """
+        Start MIB Capabilities task
+        """
+        super(OmciGetRequest, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_get_omci)
+
+    @property
+    def failed_or_unknown_attributes(self):
+        """
+        Returns a set attributes that failed or unknown in the original get
+        request that resulted in an initial status code of 9 (Attributes
+        failed or unknown).
+
+        :return: (set of str) attributes
+        """
+        return self._failed_or_unknown_attributes
+
+    @inlineCallbacks
+    def perform_get_omci(self):
+        """
+        Perform the initial get request
+        """
+        self.log.info('perform-get', entity_class=self._entity_class,
+                      entity_id=self._entity_id, attributes=self._attributes)
+        try:
+            # If one or more attributes is a table attribute, get it separately
+            def is_table_attr(attr):
+                index = self._entity_class.attribute_name_to_index_map[attr]
+                attr_def = self._entity_class.attributes[index]
+                return isinstance(attr_def.field, OmciTableField)
+
+            first_attributes = {attr for attr in self._attributes if not is_table_attr(attr)}
+            table_attributes = {attr for attr in self._attributes if is_table_attr(attr)}
+
+            frame = MEFrame(self._entity_class, self._entity_id, first_attributes).get()
+            self.strobe_watchdog()
+            results = yield self._device.omci_cc.send(frame)
+
+            status = results.fields['omci_message'].fields['success_code']
+            self.log.debug('perform-get-status', status=status)
+
+            # Success?
+            if status == RC.Success.value:
+                self._results = results
+                results_omci = results.fields['omci_message'].fields
+
+                # Were all attributes fetched?
+                missing_attr = frame.fields['omci_message'].fields['attributes_mask'] ^ \
+                    results_omci['attributes_mask']
+
+                if missing_attr > 0 or len(table_attributes) > 0:
+                    self.log.info('perform-get-missing', num_missing=missing_attr,
+                                  table_attr=table_attributes)
+                    self.strobe_watchdog()
+                    self._local_deferred = reactor.callLater(0,
+                                                             self.perform_get_missing_attributes,
+                                                             missing_attr,
+                                                             table_attributes)
+                    returnValue(self._local_deferred)
+
+            elif status == RC.AttributeFailure.value:
+                # What failed?  Note if only one attribute was attempted, then
+                # that is an overall failure
+
+                if not self._allow_failure or len(self._attributes) <= 1:
+                    raise GetException('Get failed with status code: {}'.
+                                       format(RC.AttributeFailure.value))
+
+                self.strobe_watchdog()
+                self._local_deferred = reactor.callLater(0,
+                                                         self.perform_get_failed_attributes,
+                                                         results,
+                                                         self._attributes)
+                returnValue(self._local_deferred)
+
+            else:
+                raise GetException('Get failed with status code: {}'.format(status))
+
+            self.log.debug('get-completed')
+            self.deferred.callback(self)
+
+        except TimeoutError as e:
+            self.deferred.errback(failure.Failure(e))
+
+        except Exception as e:
+            self.log.exception('perform-get', e=e, class_id=self._entity_class,
+                               entity_id=self._entity_id, attributes=self._attributes)
+            self.deferred.errback(failure.Failure(e))
+
+    @inlineCallbacks
+    def perform_get_missing_attributes(self, missing_attr, table_attributes):
+        """
+        This method is called when the original Get requests completes with success
+        but not all attributes were returned.  This can happen if one or more of the
+        attributes would have exceeded the space available in the OMCI frame.
+
+        This routine iterates through the missing attributes and attempts to retrieve
+        the ones that were missing.
+
+        :param missing_attr: (int) Missing attributes bitmask
+        :param table_attributes: (set) Attributes that need table get/get-next support
+        """
+        self.log.debug('perform-get-missing', attrs=missing_attr, tbl=table_attributes)
+
+        # Retrieve missing attributes first (if any)
+        results_omci = self._results.fields['omci_message'].fields
+
+        for index in xrange(16):
+            attr_mask = 1 << index
+
+            if attr_mask & missing_attr:
+                # Get this attribute
+                frame = OmciFrame(
+                    transaction_id=None,  # OMCI-CC will set
+                    message_type=OmciGet.message_id,
+                    omci_message=OmciGet(
+                        entity_class=self._entity_class.class_id,
+                        entity_id=self._entity_id,
+                        attributes_mask=attr_mask
+                    )
+                )
+                try:
+                    self.strobe_watchdog()
+                    get_results = yield self._device.omci_cc.send(frame)
+
+                    get_omci = get_results.fields['omci_message'].fields
+                    if get_omci['success_code'] != RC.Success.value:
+                        continue
+
+                    assert attr_mask == get_omci['attributes_mask'], 'wrong attribute'
+                    results_omci['attributes_mask'] |= attr_mask
+
+                    if results_omci.get('data') is None:
+                        results_omci['data'] = dict()
+
+                    results_omci['data'].update(get_omci['data'])
+
+                except TimeoutError:
+                    self.log.debug('missing-timeout')
+
+                except Exception as e:
+                    self.log.exception('missing-failure', e=e)
+
+        # Now any table attributes. OMCI_CC handles background get/get-next sequencing
+        for tbl_attr in table_attributes:
+            attr_mask = self._entity_class.mask_for(tbl_attr)
+            frame = OmciFrame(
+                    transaction_id=None,  # OMCI-CC will set
+                    message_type=OmciGet.message_id,
+                    omci_message=OmciGet(
+                            entity_class=self._entity_class.class_id,
+                            entity_id=self._entity_id,
+                            attributes_mask=attr_mask
+                    )
+            )
+            try:
+                timeout = 2 * DEFAULT_OMCI_TIMEOUT  # Multiple frames expected
+                self.strobe_watchdog()
+                get_results = yield self._device.omci_cc.send(frame,
+                                                              timeout=timeout)
+                self.strobe_watchdog()
+                get_omci = get_results.fields['omci_message'].fields
+                if get_omci['success_code'] != RC.Success.value:
+                    continue
+
+                if results_omci.get('data') is None:
+                    results_omci['data'] = dict()
+
+                results_omci['data'].update(get_omci['data'])
+
+            except TimeoutError:
+                self.log.debug('tbl-attr-timeout')
+
+            except Exception as e:
+                self.log.exception('tbl-attr-timeout', e=e)
+
+        self.deferred.callback(self)
+
+    @inlineCallbacks
+    def perform_get_failed_attributes(self, tmp_results, attributes):
+        """
+
+        :param tmp_results:
+        :param attributes:
+        :return:
+        """
+        self.log.debug('perform-get-failed', attrs=attributes)
+
+        for attr in attributes:
+            try:
+                frame = MEFrame(self._entity_class, self._entity_id, {attr}).get()
+
+                self.strobe_watchdog()
+                results = yield self._device.omci_cc.send(frame)
+
+                status = results.fields['omci_message'].fields['success_code']
+
+                if status == RC.AttributeFailure.value:
+                    self.log.debug('unknown-or-invalid-attribute', attr=attr, status=status)
+                    self._failed_or_unknown_attributes.add(attr)
+
+                elif status != RC.Success.value:
+                    self.log.warn('invalid-get', class_id=self._entity_class,
+                                  attribute=attr, status=status)
+                    self._failed_or_unknown_attributes.add(attr)
+
+                else:
+                    # Add to partial results and correct the status
+                    tmp_results.fields['omci_message'].fields['success_code'] = status
+                    tmp_results.fields['omci_message'].fields['attributes_mask'] |= \
+                        results.fields['omci_message'].fields['attributes_mask']
+
+                    if tmp_results.fields['omci_message'].fields.get('data') is None:
+                        tmp_results.fields['omci_message'].fields['data'] = dict()
+
+                    tmp_results.fields['omci_message'].fields['data'][attr] = \
+                        results.fields['omci_message'].fields['data'][attr]
+
+            except TimeoutError as e:
+                self.log.debug('attr-timeout')
+
+            except Exception as e:
+                self.log.exception('attr-failure', e=e)
+
+        self._results = tmp_results
+        self.deferred.callback(self)
diff --git a/python/extensions/omci/tasks/omci_modify_request.py b/python/extensions/omci/tasks/omci_modify_request.py
new file mode 100644
index 0000000..da7bff5
--- /dev/null
+++ b/python/extensions/omci/tasks/omci_modify_request.py
@@ -0,0 +1,171 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, failure, returnValue
+from voltha.extensions.omci.omci_defs import ReasonCodes, EntityOperations
+from voltha.extensions.omci.omci_me import MEFrame
+from voltha.extensions.omci.omci_frame import OmciFrame
+from voltha.extensions.omci.omci_messages import OmciCreate, OmciSet, OmciDelete
+from voltha.extensions.omci.omci_entities import EntityClass
+
+RC = ReasonCodes
+OP = EntityOperations
+
+
+class ModifyException(Exception):
+    pass
+
+
+class OmciModifyRequest(Task):
+    """
+    OpenOMCI Generic Create, Set, or Delete Frame support Task.
+
+    This task allows an ONU to send a Create, Set, or Delete request from any point in their
+    code while properly using the OMCI-CC channel.  Direct access to the OMCI-CC object
+    to send requests by an ONU is highly discouraged.
+    """
+    task_priority = 128
+    name = "ONU OMCI Modify Task"
+
+    def __init__(self, omci_agent, device_id, frame, priority=task_priority, exclusive=False):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        :param frame: (OmciFrame) Frame to send
+        :param priority: (int) OpenOMCI Task priority (0..255) 255 is the highest
+        :param exclusive: (bool) True if this GET request Task exclusively own the
+                                 OMCI-CC while running. Default: False
+        """
+        super(OmciModifyRequest, self).__init__(OmciModifyRequest.name,
+                                                omci_agent,
+                                                device_id,
+                                                priority=priority,
+                                                exclusive=exclusive)
+        self._device = omci_agent.get_device(device_id)
+        self._frame = frame
+        self._results = None
+        self._local_deferred = None
+
+        # Validate message type
+        self._msg_type = frame.fields['message_type']
+        if self._msg_type not in (OmciCreate.message_id, OmciSet.message_id, OmciDelete.message_id):
+            raise TypeError('Invalid Message type: {}, must be Create, Set, or Delete'.
+                            format(self._msg_type))
+
+    def cancel_deferred(self):
+        super(OmciModifyRequest, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    @property
+    def success_code(self):
+        """
+        Return the OMCI success/reason code for the Get Response.
+        """
+        if self._results is None:
+            return None
+
+        return self._results.fields['omci_message'].fields['success_code']
+
+    @property
+    def illegal_attributes_mask(self):
+        """
+        For Create & Set requests, a failure may indicate that one or more
+        attributes have an illegal value.  This property returns any illegal
+        attributes
+
+        :return: None if not a create/set request, otherwise the attribute mask
+                 of illegal attributes
+        """
+        if self._results is None:
+            return None
+
+        omci_msg = self._results.fields['omci_message'].fields
+
+        if self._msg_type == OmciCreate.message_id:
+            if self.success_code != RC.ParameterError:
+                return 0
+            return omci_msg['parameter_error_attributes_mask']
+
+        elif self._msg_type == OmciSet.message_id:
+            if self.success_code != RC.AttributeFailure:
+                return 0
+            return omci_msg['failed_attributes_mask']
+
+        return None
+
+    @property
+    def unsupported_attributes_mask(self):
+        """
+        For Set requests, a failure may indicate that one or more attributes
+        are not supported by this ONU. This property returns any those unsupported attributes
+
+        :return: None if not a set request, otherwise the attribute mask of any illegal
+                 parameters
+        """
+        if self._msg_type != OmciSet.message_id or self._results is None:
+            return None
+
+        if self.success_code != RC.AttributeFailure:
+            return 0
+
+        return self._results.fields['omci_message'].fields['unsupported_attributes_mask']
+
+    @property
+    def raw_results(self):
+        """
+        Return the raw Response OMCIFrame
+        """
+        return self._results
+
+    def start(self):
+        """
+        Start MIB Capabilities task
+        """
+        super(OmciModifyRequest, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_omci)
+
+    @inlineCallbacks
+    def perform_omci(self):
+        """
+        Perform the request
+        """
+        self.log.debug('perform-request')
+
+        try:
+            self.strobe_watchdog()
+            self._results = yield self._device.omci_cc.send(self._frame)
+
+            status = self._results.fields['omci_message'].fields['success_code']
+            self.log.debug('response-status', status=status)
+
+            # Success?
+            if status in (RC.Success.value, RC.InstanceExists):
+                self.deferred.callback(self)
+            else:
+                raise ModifyException('Failed with status {}'.format(status))
+
+        except Exception as e:
+            self.log.exception('perform-modify', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/omci_sw_image_upgrade_task.py b/python/extensions/omci/tasks/omci_sw_image_upgrade_task.py
new file mode 100644
index 0000000..5eaa87c
--- /dev/null
+++ b/python/extensions/omci/tasks/omci_sw_image_upgrade_task.py
@@ -0,0 +1,64 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from task import Task
+from twisted.internet import reactor
+from voltha.protos.voltha_pb2 import ImageDownload
+
+class OmciSwImageUpgradeTask(Task):
+    name = "OMCI Software Image Upgrade Task"
+
+
+    def __init__(self, img_id, omci_upgrade_sm_cls, omci_agent, image_download, clock=None):
+        super(OmciSwImageUpgradeTask, self).__init__(OmciSwImageUpgradeTask.name, omci_agent, image_download.id,
+                                                     exclusive=False,
+                                                     watchdog_timeout=45)
+        self.log.debug("OmciSwImageUpgradeTask create ", image_id=img_id)
+        self._image_id = img_id
+        self._omci_upgrade_sm_cls = omci_upgrade_sm_cls
+        # self._omci_agent = omci_agent
+        self._image_download = image_download
+        self.reactor = clock if clock is not None else reactor
+        self._omci_upgrade_sm = None
+        self.log.debug("OmciSwImageUpgradeTask create end", image_id=img_id)
+
+    @property 
+    def status(self):
+        return self._image_download
+        
+    def start(self):
+        self.log.debug("OmciSwImageUpgradeTask start")
+        super(OmciSwImageUpgradeTask, self).start()
+        if self._omci_upgrade_sm is None:
+            self._omci_upgrade_sm = self._omci_upgrade_sm_cls(self._image_id, self.omci_agent, self._image_download, clock=self.reactor)
+            d = self._omci_upgrade_sm.start()
+            d.chainDeferred(self.deferred)
+        #else:
+        #    if restart:
+        #        self._omci_upgrade_sm.reset_image()
+
+    def stop(self):
+        self.log.debug("OmciSwImageUpgradeTask stop")
+        if self._omci_upgrade_sm is not None:
+            self._omci_upgrade_sm.stop()
+            self._omci_upgrade_sm = None
+    
+    def onu_bootup(self):
+        self.log.debug("onu_bootup", state=self._omci_upgrade_sm.status.image_state);
+        if self._omci_upgrade_sm is not None \
+            and self._omci_upgrade_sm.status.image_state == ImageDownload.IMAGE_ACTIVATE:
+            self._omci_upgrade_sm.do_commit()
+    
diff --git a/python/extensions/omci/tasks/onu_capabilities_task.py b/python/extensions/omci/tasks/onu_capabilities_task.py
new file mode 100644
index 0000000..048382c
--- /dev/null
+++ b/python/extensions/omci/tasks/onu_capabilities_task.py
@@ -0,0 +1,282 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from binascii import hexlify
+from twisted.internet.defer import inlineCallbacks, failure, returnValue
+from twisted.internet import reactor
+from voltha.extensions.omci.omci_defs import ReasonCodes
+from voltha.extensions.omci.omci_me import OmciFrame
+from voltha.extensions.omci.omci import EntityOperations
+
+
+class GetNextException(Exception):
+    pass
+
+
+class GetCapabilitiesFailure(Exception):
+    pass
+
+
+class OnuCapabilitiesTask(Task):
+    """
+    OpenOMCI MIB Capabilities Task
+
+    This task requests information on supported MEs via the OMCI (ME#287)
+    Managed entity.
+
+    This task should be ran after MIB Synchronization and before any MIB
+    Downloads to the ONU.
+
+    Upon completion, the Task deferred callback is invoked with dictionary
+    containing the supported managed entities and message types.
+
+    results = {
+                'supported-managed-entities': {set of supported managed entities},
+                'supported-message-types': {set of supported message types}
+              }
+    """
+    task_priority = 240
+    name = "ONU Capabilities Task"
+
+    max_mib_get_next_retries = 3
+    mib_get_next_delay = 5
+    DEFAULT_OCTETS_PER_MESSAGE = 29
+
+    def __init__(self, omci_agent, device_id, omci_pdu_size=DEFAULT_OCTETS_PER_MESSAGE):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        :param omci_pdu_size: (int) OMCI Data payload size (not counting any trailers)
+        """
+        super(OnuCapabilitiesTask, self).__init__(OnuCapabilitiesTask.name,
+                                                  omci_agent,
+                                                  device_id,
+                                                  priority=OnuCapabilitiesTask.task_priority)
+        self._local_deferred = None
+        self._device = omci_agent.get_device(device_id)
+        self._pdu_size = omci_pdu_size
+        self._supported_entities = set()
+        self._supported_msg_types = set()
+
+    def cancel_deferred(self):
+        super(OnuCapabilitiesTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    @property
+    def supported_managed_entities(self):
+        """
+        Return a set of the Managed Entity class IDs supported on this ONU
+
+        None is returned if no MEs have been discovered
+
+        :return: (set of ints)
+        """
+        return frozenset(self._supported_entities) if len(self._supported_entities) else None
+
+    @property
+    def supported_message_types(self):
+        """
+        Return a set of the Message Types supported on this ONU
+
+        None is returned if no message types have been discovered
+
+        :return: (set of EntityOperations)
+        """
+        return frozenset(self._supported_msg_types) if len(self._supported_msg_types) else None
+
+    def start(self):
+        """
+        Start MIB Capabilities task
+        """
+        super(OnuCapabilitiesTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_get_capabilities)
+
+    def stop(self):
+        """
+        Shutdown MIB Capabilities task
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        self._device = None
+        super(OnuCapabilitiesTask, self).stop()
+
+    @inlineCallbacks
+    def perform_get_capabilities(self):
+        """
+        Perform the MIB Capabilities sequence.
+
+        The sequence is to perform a Get request with the attribute mask equal
+        to 'me_type_table'.  The response to this request will carry the size
+        of (number of get-next sequences).
+
+        Then a loop is entered and get-next commands are sent for each sequence
+        requested.
+        """
+        self.log.debug('perform-get')
+
+        try:
+            self.strobe_watchdog()
+            self._supported_entities = yield self.get_supported_entities()
+
+            self.strobe_watchdog()
+            self._supported_msg_types = yield self.get_supported_message_types()
+
+            self.log.debug('get-success',
+                           supported_entities=self.supported_managed_entities,
+                           supported_msg_types=self.supported_message_types)
+            results = {
+                'supported-managed-entities': self.supported_managed_entities,
+                'supported-message-types': self.supported_message_types
+            }
+            self.deferred.callback(results)
+
+        except Exception as e:
+            self.log.exception('perform-get', e=e)
+            self.deferred.errback(failure.Failure(e))
+
+    def get_count_from_data_buffer(self, data):
+        """
+        Extract the 4 octet buffer length from the OMCI PDU contents
+        """
+        self.log.debug('get-count-buffer', data=hexlify(data))
+        return int(hexlify(data[:4]), 16)
+
+    @inlineCallbacks
+    def get_supported_entities(self):
+        """
+        Get the supported ME Types for this ONU.
+        """
+        try:
+            # Get the number of requests needed
+            frame = OmciFrame(me_type_table=True).get()
+            self.strobe_watchdog()
+            results = yield self._device.omci_cc.send(frame)
+
+            omci_msg = results.fields['omci_message']
+            status = omci_msg.fields['success_code']
+
+            if status != ReasonCodes.Success.value:
+                raise GetCapabilitiesFailure('Get count of supported entities failed with status code: {}'.
+                                             format(status))
+            data = omci_msg.fields['data']['me_type_table']
+            count = self.get_count_from_data_buffer(bytearray(data))
+
+            seq_no = 0
+            data_buffer = bytearray(0)
+            self.log.debug('me-type-count', octets=count, data=hexlify(data))
+
+            # Start the loop
+            for offset in xrange(0, count, self._pdu_size):
+                frame = OmciFrame(me_type_table=seq_no).get_next()
+                seq_no += 1
+                self.strobe_watchdog()
+                results = yield self._device.omci_cc.send(frame)
+
+                omci_msg = results.fields['omci_message']
+                status = omci_msg.fields['success_code']
+
+                if status != ReasonCodes.Success.value:
+                    raise GetCapabilitiesFailure(
+                        'Get supported entities request at offset {} of {} failed with status code: {}'.
+                        format(offset + 1, count, status))
+
+                # Extract the data
+                num_octets = count - offset
+                if num_octets > self._pdu_size:
+                    num_octets = self._pdu_size
+
+                data = omci_msg.fields['data']['me_type_table']
+                data_buffer += bytearray(data[:num_octets])
+
+            me_types = {(data_buffer[x] << 8) + data_buffer[x + 1]
+                        for x in xrange(0, len(data_buffer), 2)}
+            returnValue(me_types)
+
+        except Exception as e:
+            self.log.exception('get-entities', e=e)
+            self.deferred.errback(failure.Failure(e))
+
+    @inlineCallbacks
+    def get_supported_message_types(self):
+        """
+        Get the supported Message Types (actions) for this ONU.
+        """
+        try:
+            # Get the number of requests needed
+            frame = OmciFrame(message_type_table=True).get()
+            self.strobe_watchdog()
+            results = yield self._device.omci_cc.send(frame)
+
+            omci_msg = results.fields['omci_message']
+            status = omci_msg.fields['success_code']
+
+            if status != ReasonCodes.Success.value:
+                raise GetCapabilitiesFailure('Get count of supported msg types failed with status code: {}'.
+                                             format(status))
+
+            data = omci_msg.fields['data']['message_type_table']
+            count = self.get_count_from_data_buffer(bytearray(data))
+
+            seq_no = 0
+            data_buffer = list()
+            self.log.debug('me-type-count', octets=count, data=hexlify(data))
+
+            # Start the loop
+            for offset in xrange(0, count, self._pdu_size):
+                frame = OmciFrame(message_type_table=seq_no).get_next()
+                seq_no += 1
+                self.strobe_watchdog()
+                results = yield self._device.omci_cc.send(frame)
+
+                omci_msg = results.fields['omci_message']
+                status = omci_msg.fields['success_code']
+
+                if status != ReasonCodes.Success.value:
+                    raise GetCapabilitiesFailure(
+                        'Get supported msg types request at offset {} of {} failed with status code: {}'.
+                        format(offset + 1, count, status))
+
+                # Extract the data
+                num_octets = count - offset
+                if num_octets > self._pdu_size:
+                    num_octets = self._pdu_size
+
+                data = omci_msg.fields['data']['message_type_table']
+                data_buffer += data[:num_octets]
+
+            def buffer_to_message_type(value):
+                """
+                Convert an integer value to the appropriate EntityOperations enumeration
+                :param value: (int) Message type value (4..29)
+                :return: (EntityOperations) Enumeration, None on failure
+                """
+                next((v for k, v in EntityOperations.__members__.items() if v.value == value), None)
+
+            msg_types = {buffer_to_message_type(v) for v in data_buffer if v is not None}
+            returnValue({msg_type for msg_type in msg_types if msg_type is not None})
+
+        except Exception as e:
+            self.log.exception('get-msg-types', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/reboot_task.py b/python/extensions/omci/tasks/reboot_task.py
new file mode 100644
index 0000000..316e23b
--- /dev/null
+++ b/python/extensions/omci/tasks/reboot_task.py
@@ -0,0 +1,125 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from enum import IntEnum
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, failure, TimeoutError
+from voltha.extensions.omci.omci_defs import ReasonCodes, EntityOperations
+from voltha.extensions.omci.omci_me import OntGFrame
+from voltha.extensions.omci.omci_cc import DEFAULT_OMCI_TIMEOUT
+
+RC = ReasonCodes
+OP = EntityOperations
+
+
+class RebootException(Exception):
+    pass
+
+
+class DeviceBusy(Exception):
+    pass
+
+
+class RebootFlags(IntEnum):
+    Reboot_Unconditionally = 0,
+    Reboot_If_No_POTS_VoIP_In_Progress = 1,
+    Reboot_If_No_Emergency_Call_In_Progress = 2
+
+
+class OmciRebootRequest(Task):
+    """
+    OpenOMCI routine to request reboot of an ONU
+    """
+    task_priority = Task.MAX_PRIORITY
+    name = "ONU OMCI Reboot Task"
+    # adopt the global default
+    DEFAULT_REBOOT_TIMEOUT = DEFAULT_OMCI_TIMEOUT
+
+    def __init__(self, omci_agent, device_id,
+                 flags=RebootFlags.Reboot_Unconditionally,
+                 timeout=DEFAULT_REBOOT_TIMEOUT):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param flags: (RebootFlags) Reboot condition
+        """
+        super(OmciRebootRequest, self).__init__(OmciRebootRequest.name,
+                                                omci_agent,
+                                                device_id,
+                                                priority=OmciRebootRequest.task_priority,
+                                                exclusive=True)
+        self._device = omci_agent.get_device(device_id)
+        self._flags = flags
+        self._timeout = timeout
+        self._local_deferred = None
+
+    def cancel_deferred(self):
+        super(OmciRebootRequest, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """ Start task """
+        super(OmciRebootRequest, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_reboot)
+
+    @inlineCallbacks
+    def perform_reboot(self):
+        """
+        Perform the reboot requests
+
+        Depending on the ONU implementation, a response may not be returned. For this
+        reason, a timeout is considered successful.
+        """
+        self.log.info('perform-reboot')
+
+        try:
+            frame = OntGFrame().reboot(reboot_code=self._flags)
+            self.strobe_watchdog()
+            results = yield self._device.omci_cc.send(frame, timeout=self._timeout)
+
+            status = results.fields['omci_message'].fields['success_code']
+            self.log.debug('reboot-status', status=status)
+
+            # Did it fail
+            if status != RC.Success.value:
+                if self._flags != RebootFlags.Reboot_Unconditionally and\
+                        status == RC.DeviceBusy.value:
+                    raise DeviceBusy('ONU is busy, try again later')
+                else:
+                    msg = 'Reboot request failed with status {}'.format(status)
+                    raise RebootException(msg)
+
+            self.log.info('reboot-success')
+            self.deferred.callback(self)
+
+        except TimeoutError:
+            self.log.info('timeout', msg='Request timeout is not considered an error')
+            self.deferred.callback(None)
+
+        except DeviceBusy as e:
+            self.log.warn('perform-reboot', msg=e)
+            self.deferred.errback(failure.Failure(e))
+
+        except Exception as e:
+            self.log.exception('perform-reboot', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/sync_time_task.py b/python/extensions/omci/tasks/sync_time_task.py
new file mode 100644
index 0000000..b5b1dc9
--- /dev/null
+++ b/python/extensions/omci/tasks/sync_time_task.py
@@ -0,0 +1,107 @@
+#
+# Copyright 2018 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from task import Task
+from twisted.internet import reactor
+from twisted.internet.defer import inlineCallbacks, TimeoutError, failure
+from voltha.extensions.omci.omci_me import OntGFrame
+from voltha.extensions.omci.omci_defs import ReasonCodes as RC
+from datetime import datetime
+
+
+class SyncTimeTask(Task):
+    """
+    OpenOMCI - Synchronize the ONU time with server
+    """
+    task_priority = Task.DEFAULT_PRIORITY + 10
+    name = "Sync Time Task"
+
+    def __init__(self, omci_agent, device_id, use_utc=True):
+        """
+        Class initialization
+
+        :param omci_agent: (OmciAdapterAgent) OMCI Adapter agent
+        :param device_id: (str) ONU Device ID
+        :param use_utc: (bool) Use UTC time if True, otherwise local time
+        """
+        super(SyncTimeTask, self).__init__(SyncTimeTask.name,
+                                           omci_agent,
+                                           device_id,
+                                           priority=SyncTimeTask.task_priority,
+                                           exclusive=False)
+        self._local_deferred = None
+        self._use_utc = use_utc
+
+    def cancel_deferred(self):
+        super(SyncTimeTask, self).cancel_deferred()
+
+        d, self._local_deferred = self._local_deferred, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def start(self):
+        """
+        Start the tasks
+        """
+        super(SyncTimeTask, self).start()
+        self._local_deferred = reactor.callLater(0, self.perform_sync_time)
+
+    def stop(self):
+        """
+        Shutdown the tasks
+        """
+        self.log.debug('stopping')
+
+        self.cancel_deferred()
+        super(SyncTimeTask, self).stop()
+
+    @inlineCallbacks
+    def perform_sync_time(self):
+        """
+        Sync the time
+        """
+        self.log.debug('perform-sync-time')
+
+        try:
+            device = self.omci_agent.get_device(self.device_id)
+
+            #########################################
+            # ONT-G (ME #256)
+            dt = datetime.utcnow() if self._use_utc else datetime.now()
+
+            results = yield device.omci_cc.send(OntGFrame().synchronize_time(dt))
+
+            omci_msg = results.fields['omci_message'].fields
+            status = omci_msg['success_code']
+            self.log.debug('sync-time', status=status)
+
+            if status == RC.Success:
+                self.log.info('sync-time', success_info=omci_msg['success_info'] & 0x0f)
+
+            assert status == RC.Success, 'Unexpected Response Status: {}'.format(status)
+
+            # Successful if here
+            self.deferred.callback(results)
+
+        except TimeoutError as e:
+            self.log.warn('sync-time-timeout', e=e)
+            self.deferred.errback(failure.Failure(e))
+
+        except Exception as e:
+            self.log.exception('sync-time', e=e)
+            self.deferred.errback(failure.Failure(e))
diff --git a/python/extensions/omci/tasks/task.py b/python/extensions/omci/tasks/task.py
new file mode 100644
index 0000000..36020c0
--- /dev/null
+++ b/python/extensions/omci/tasks/task.py
@@ -0,0 +1,188 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from twisted.internet import defer, reactor
+from twisted.internet.defer import failure
+
+
+class WatchdogTimeoutFailure(Exception):
+    """Task callback/errback not called properly before watchdog expiration"""
+    pass
+
+
+class Task(object):
+    """
+    OpenOMCI Base Task implementation
+
+    An OMCI task can be one or more OMCI requests, comparisons, or whatever
+    is needed to do a specific unit of work that needs to be ran to completion
+    successfully.
+
+    On successful completion, the task should called the 'callback' method of
+    the deferred and pass back whatever is meaningful to the user/state-machine
+    that launched it.
+
+    On failure, the 'errback' routine should be called with an appropriate
+    Failure object.
+    """
+    DEFAULT_PRIORITY = 128
+    MIN_PRIORITY = 0
+    MAX_PRIORITY = 255
+    DEFAULT_WATCHDOG_SECS = 10          # 10 seconds
+    MIN_WATCHDOG_SECS = 3               # 3 seconds
+    MAX_WATCHDOG_SECS = 60              # 60 seconds
+
+    _next_task_id = 0
+
+    def __init__(self, name, omci_agent, device_id, priority=DEFAULT_PRIORITY,
+                 exclusive=True, watchdog_timeout=DEFAULT_WATCHDOG_SECS):
+        """
+        Class initialization
+
+        :param name: (str) Task Name
+        :param device_id: (str) ONU Device ID
+        :param priority: (int) Task priority (0..255) 255 Highest
+        :param exclusive: (bool) If True, this task needs exclusive access to the
+                                 OMCI Communications channel when it runs
+        :param watchdog_timeout (int or float) Watchdog timeout (seconds) after task start, to
+                                run longer, periodically call 'strobe_watchdog()' to reschedule.
+        """
+        assert Task.MIN_PRIORITY <= priority <= Task.MAX_PRIORITY, \
+            'Priority should be {}..{}'.format(Task.MIN_PRIORITY, Task.MAX_PRIORITY)
+
+        assert Task.MIN_WATCHDOG_SECS <= watchdog_timeout <= Task.MAX_WATCHDOG_SECS, \
+            'Watchdog timeout should be {}..{} seconds'
+
+        Task._next_task_id += 1
+        self._task_id = Task._next_task_id
+        self.log = structlog.get_logger(device_id=device_id, name=name,
+                                        task_id=self._task_id)
+        self.name = name
+        self.device_id = device_id
+        self.omci_agent = omci_agent
+        self._running = False
+        self._exclusive = exclusive
+        self._deferred = defer.Deferred()       # Fires upon completion
+        self._watchdog = None
+        self._watchdog_timeout = watchdog_timeout
+        self._priority = priority
+
+    def __str__(self):
+        return 'Task: {}, ID:{}, Priority: {}, Exclusive: {}, Watchdog: {}'.format(
+            self.name, self.task_id, self.priority, self.exclusive, self.watchdog_timeout)
+
+    @property
+    def priority(self):
+        return self._priority
+
+    @property
+    def task_id(self):
+        return self._task_id
+
+    @property
+    def exclusive(self):
+        return self._exclusive
+
+    @property
+    def watchdog_timeout(self):
+        return self._watchdog_timeout
+
+    @property
+    def deferred(self):
+        return self._deferred
+
+    @property
+    def running(self):
+        # Is the Task running?
+        #
+        # Can be useful for tasks that use inline callbacks to detect
+        # if the task has been canceled.
+        #
+        return self._running
+
+    def cancel_deferred(self):
+        d1, self._deferred = self._deferred, None
+        d2, self._watchdog = self._watchdog, None
+
+        for d in [d1, d2]:
+            try:
+                if d is not None and not d.called:
+                    d.cancel()
+            except:
+                pass
+
+    def start(self):
+        """
+        Start task operations
+        """
+        self.log.debug('starting')
+        assert self._deferred is not None and not self._deferred.called, \
+            'Cannot re-use the same task'
+        self._running = True
+        self.strobe_watchdog()
+
+    def stop(self):
+        """
+        Stop task synchronization
+        """
+        self.log.debug('stopping')
+        self._running = False
+        self.cancel_deferred()
+        self.omci_agent = None      # Should only start/stop once
+
+    def task_cleanup(self):
+        """
+        This method should only be called from the TaskRunner's callback/errback
+        that is added when the task is initially queued. It is responsible for
+        clearing of the 'running' flag and canceling of the watchdog time
+        """
+        self._running = False
+        d, self._watchdog = self._watchdog, None
+        try:
+            if d is not None and not d.called:
+                d.cancel()
+        except:
+            pass
+
+    def strobe_watchdog(self):
+        """
+        Signal that we have not hung/deadlocked
+        """
+        # Create if first time (called at Task start)
+
+        def watchdog_timeout():
+            # Task may have hung (blocked) or failed to call proper success/error
+            # completion callback/errback
+            if not self.deferred.called:
+                err_msg = 'Task {}:{} watchdog timeout'.format(self.name, self.task_id)
+                self.log.error("task-watchdog-timeout", running=self.running,
+                               timeout=self.watchdog_timeout, error=err_msg)
+
+                self.deferred.errback(failure.Failure(WatchdogTimeoutFailure(err_msg)))
+                self.deferred.cancel()
+
+        if self._watchdog is not None:
+            if self._watchdog.called:
+                # Too late, timeout failure in progress
+                self.log.warn('task-watchdog-tripped', running=self.running,
+                              timeout=self.watchdog_timeout)
+                return
+
+            d, self._watchdog = self._watchdog, None
+            d.cancel()
+
+        # Schedule/re-schedule the watchdog timer
+        self._watchdog = reactor.callLater(self.watchdog_timeout, watchdog_timeout)
diff --git a/python/extensions/omci/tasks/task_runner.py b/python/extensions/omci/tasks/task_runner.py
new file mode 100644
index 0000000..eb7a252
--- /dev/null
+++ b/python/extensions/omci/tasks/task_runner.py
@@ -0,0 +1,285 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import structlog
+from twisted.internet import reactor
+
+
+class TaskRunner(object):
+    """
+    Control the number of running tasks utilizing the OMCI Communications
+    channel (OMCI_CC
+    """
+    def __init__(self, device_id, clock=None):
+        self.log = structlog.get_logger(device_id=device_id)
+        self._pending_queue = dict()   # task-priority -> [tasks]
+        self._running_queue = dict()   # task-id -> task
+        self._active = False
+
+        self._successful_tasks = 0
+        self._failed_tasks = 0
+        self._watchdog_timeouts = 0
+        self._last_watchdog_failure_task = ''
+        self.reactor = clock if clock is not None else reactor
+
+    def __str__(self):
+        return 'TaskRunner: Pending: {}, Running:{}'.format(self.pending_tasks,
+                                                            self.running_tasks)
+
+    @property
+    def active(self):
+        return self._active
+
+    @property
+    def pending_tasks(self):
+        """
+        Get the number of tasks pending to run
+        """
+        count = 0
+        for tasks in self._pending_queue.itervalues():
+            count += len(tasks)
+        return count
+
+    @property
+    def running_tasks(self):
+        """
+        Get the number of tasks currently running
+        """
+        return len(self._running_queue)
+
+    @property
+    def successful_tasks_completed(self):
+        return self._successful_tasks
+
+    @property
+    def failed_tasks(self):
+        return self._failed_tasks
+
+    @property
+    def watchdog_timeouts(self):
+        return self._watchdog_timeouts
+
+    @property
+    def last_watchdog_failure_task(self):
+        """ Task name of last tasks to fail due to watchdog"""
+        return self._last_watchdog_failure_task
+
+    # TODO: add properties for various stats as needed
+
+    def start(self):
+        """
+        Start the Task runner
+        """
+        self.log.debug('starting', active=self._active)
+
+        if not self._active:
+            assert len(self._running_queue) == 0, 'Running task queue not empty'
+            self._active = True
+            self._run_next_task()
+
+    def stop(self):
+        """
+        Stop the Task runner, first stopping any tasks and flushing the queue
+        """
+        self.log.debug('stopping', active=self._active)
+
+        if self._active:
+            self._active = False
+
+            pq, self._pending_queue = self._pending_queue, dict()
+            rq, self._running_queue = self._running_queue, dict()
+
+            # Stop running tasks
+            for task in rq.itervalues():
+                try:
+                    task.stop()
+                except:
+                    pass
+
+            # Kill pending tasks
+            for d in pq.iterkeys():
+                try:
+                    d.cancel()
+                except:
+                    pass
+
+    def _run_next_task(self):
+        """
+        Search for next task to run, if one can
+        :return:
+        """
+        self.log.debug('run-next', active=self._active,
+                       num_running=len(self._running_queue),
+                       num_pending=len(self._pending_queue))
+
+        if self._active and len(self._pending_queue) > 0:
+            # Cannot run a new task if a running one needs the OMCI_CC exclusively
+
+            if any(task.exclusive for task in self._running_queue.itervalues()):
+                self.log.debug('exclusive-running')
+                return    # An exclusive task is already running
+
+            try:
+                priorities = [k for k in self._pending_queue.iterkeys()]
+                priorities.sort(reverse=True)
+                highest_priority = priorities[0] if len(priorities) else None
+
+                if highest_priority is not None:
+                    queue = self._pending_queue[highest_priority]
+                    next_task = queue[0] if len(queue) else None
+
+                    if next_task is not None:
+                        if next_task.exclusive and len(self._running_queue) > 0:
+                            self.log.debug('next-is-exclusive', task=str(next_task))
+                            return  # Next task to run needs exclusive access
+
+                        queue.pop(0)
+                        if len(queue) == 0:
+                            del self._pending_queue[highest_priority]
+
+                        self.log.debug('starting-task', task=str(next_task),
+                                       running=len(self._running_queue),
+                                       pending=len(self._pending_queue))
+
+                        self._running_queue[next_task.task_id] = next_task
+                        self.reactor.callLater(0, next_task.start)
+
+                # Run again if others are waiting
+                if len(self._pending_queue):
+                    self._run_next_task()
+
+            except Exception as e:
+                self.log.exception('run-next', e=e)
+
+    def _on_task_success(self, results, task):
+        """
+        A task completed successfully callback
+        :param results: deferred results
+        :param task: (Task) The task that succeeded
+        :return: deferred results
+        """
+        self.log.debug('task-success', task_id=str(task),
+                       running=len(self._running_queue),
+                       pending=len(self._pending_queue))
+        try:
+            assert task is not None and task.task_id in self._running_queue,\
+                'Task not found in running queue'
+
+            task.task_cleanup()
+            self._successful_tasks += 1
+            del self._running_queue[task.task_id]
+
+        except Exception as e:
+            self.log.exception('task-error', task=str(task), e=e)
+
+        finally:
+            reactor.callLater(0, self._run_next_task)
+
+        return results
+
+    def _on_task_failure(self, failure, task):
+        """
+        A task completed with failure callback
+        :param failure: (Failure) Failure results
+        :param task: (Task) The task that failed
+        :return: (Failure) Failure results
+        """
+        from voltha.extensions.omci.tasks.task import WatchdogTimeoutFailure
+
+        self.log.debug('task-failure', task_id=str(task),
+                       running=len(self._running_queue),
+                       pending=len(self._pending_queue))
+        try:
+            assert task is not None and task.task_id in self._running_queue,\
+                'Task not found in running queue'
+
+            task.task_cleanup()
+            self._failed_tasks += 1
+            del self._running_queue[task.task_id]
+
+            if isinstance(failure.value, WatchdogTimeoutFailure):
+                self._watchdog_timeouts += 1
+                self._last_watchdog_failure_task = task.name
+
+        except Exception as e:
+            # Check the pending queue
+
+            for priority, tasks in self._pending_queue.iteritems():
+                found = next((t for t in tasks if t.task_id == task.task_id), None)
+
+                if found is not None:
+                    self._pending_queue[task.priority].remove(task)
+                    if len(self._pending_queue[task.priority]) == 0:
+                        del self._pending_queue[task.priority]
+                    return failure
+
+            self.log.exception('task-error', task=str(task), e=e)
+            raise
+
+        finally:
+            reactor.callLater(0, self._run_next_task)
+
+        return failure
+
+    def queue_task(self, task):
+        """
+        Place a task on the queue to run
+
+        :param task: (Task) task to run
+        :return: (deferred) Deferred that will fire on task completion
+        """
+        self.log.debug('queue-task', active=self._active, task=str(task),
+                       running=len(self._running_queue),
+                       pending=len(self._pending_queue))
+
+        if task.priority not in self._pending_queue:
+            self._pending_queue[task.priority] = []
+
+        task.deferred.addCallbacks(self._on_task_success, self._on_task_failure,
+                                   callbackArgs=[task], errbackArgs=[task])
+
+        self._pending_queue[task.priority].append(task)
+        self._run_next_task()
+
+        return task.deferred
+
+    def cancel_task(self, task_id):
+        """
+        Cancel a pending or running task.  The cancel method will be called
+        for the task's deferred
+
+        :param task_id: (int) Task identifier
+        """
+        task = self._running_queue.get(task_id, None)
+
+        if task is not None:
+            try:
+                task.stop()
+            except Exception as e:
+                self.log.exception('stop-error', task=str(task), e=e)
+
+            reactor.callLater(0, self._run_next_task)
+
+        else:
+            for priority, tasks in self._pending_queue.iteritems():
+                task = next((t for t in tasks if t.task_id == task_id), None)
+
+                if task is not None:
+                    try:
+                        task.deferred.cancel()
+                    except Exception as e:
+                        self.log.exception('cancel-error', task=str(task), e=e)
+                    return
+