diff --git a/common/pon_resource_manager/resource_manager.py b/common/pon_resource_manager/resource_manager.py
new file mode 100644
index 0000000..4abead3
--- /dev/null
+++ b/common/pon_resource_manager/resource_manager.py
@@ -0,0 +1,460 @@
+#
+# 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.
+#
+
+"""
+Resource Manager will be unique for each OLT device.
+
+It exposes APIs to create/free alloc_ids/onu_ids/gemport_ids. Resource Manager
+uses a KV store in backend to ensure resiliency of the data.
+"""
+import json
+import structlog
+from bitstring import BitArray
+from twisted.internet.defer import returnValue, inlineCallbacks
+
+from common.kvstore.kvstore import create_kv_client
+from common.utils.asleep import asleep
+
+
+class PONResourceManager(object):
+    """Implements APIs to initialize/allocate/release alloc/gemport/onu IDs."""
+
+    # Constants to identify resource pool
+    ONU_ID = 'ONU_ID'
+    ALLOC_ID = 'ALLOC_ID'
+    GEMPORT_ID = 'GEMPORT_ID'
+
+    # The resource ranges for a given device vendor_type should be placed
+    # at 'resource_manager/<technology>/resource_ranges/<olt_vendor_type>'
+    # path on the KV store.
+    # If Resource Range parameters are to be read from the external KV store,
+    # they are expected to be stored in the following format.
+    # Note: All parameters are MANDATORY for now.
+    '''
+        {
+           "onu_start_idx": 1,
+           "onu_end_idx": 127,
+           "alloc_id_start_idx": 1024,
+           "alloc_id_end_idx": 65534,
+           "gem_port_id_start_idx": 1024,
+           "gem_port_id_end_idx": 16383,
+           "num_of_pon_port": 16
+        }
+    '''
+    # constants used as keys to reference the resource range parameters from
+    # and external KV store.
+    ONU_START_IDX = "onu_start_idx"
+    ONU_END_IDX = "onu_end_idx"
+    ALLOC_ID_START_IDX = "alloc_id_start_idx"
+    ALLOC_ID_END_IDX = "alloc_id_end_idx"
+    GEM_PORT_ID_START_IDX = "gem_port_id_start_idx"
+    GEM_PORT_ID_END_IDX = "gem_port_id_end_idx"
+    NUM_OF_PON_PORT = "num_of_pon_port"
+
+    # PON Resource range configuration on the KV store.
+    # Format: 'resource_manager/<technology>/resource_ranges/<olt_vendor_type>'
+    PON_RESOURCE_RANGE_CONFIG_PATH = 'resource_manager/{}/resource_ranges/{}'
+
+    # resource path in kv store
+    ALLOC_ID_POOL_PATH = 'resource_manager/{}/{}/alloc_id_pool/{}'
+    GEMPORT_ID_POOL_PATH = 'resource_manager/{}/{}/gemport_id_pool/{}'
+    ONU_ID_POOL_PATH = 'resource_manager/{}/{}/onu_id_pool/{}'
+
+    # Constants for internal usage.
+    PON_INTF_ID = 'pon_intf_id'
+    START_IDX = 'start_idx'
+    END_IDX = 'end_idx'
+    POOL = 'pool'
+
+    def __init__(self, technology, olt_vendor_type, device_id,
+                 backend, host, port):
+        """
+        Create PONResourceManager object.
+
+        :param technology: PON technology
+        :param: olt_vendor_type: This string defines the OLT vendor type
+        and is used as a Key to load the resource range configuration from
+        KV store location.
+        :param device_id: OLT device id
+        :param backend: backend store
+        :param host: ip of backend store
+        :param port: port on which backend store listens
+        :raises exception when invalid backend store passed as an argument
+        """
+        # logger
+        self._log = structlog.get_logger()
+
+        try:
+            self._kv_store = create_kv_client(backend, host, port)
+            self.technology = technology
+            self.olt_vendor_type = olt_vendor_type
+            self.device_id = device_id
+            # Below attribute, pon_resource_ranges, should be initialized
+            # by reading from KV store.
+            self.pon_resource_ranges = dict()
+        except Exception as e:
+            self._log.exception("exception-in-init")
+            raise Exception(e)
+
+    @inlineCallbacks
+    def init_pon_resource_ranges(self):
+        # Try to initialize the PON Resource Ranges from KV store if available
+        status = yield self.init_resource_ranges_from_kv_store()
+        # If reading from KV store fails, initialize to default values.
+        if not status:
+            self._log.error("failed-to-read-resource-ranges-from-kv-store")
+            self.init_default_pon_resource_ranges()
+
+    @inlineCallbacks
+    def init_resource_ranges_from_kv_store(self):
+        path = self.PON_RESOURCE_RANGE_CONFIG_PATH.format(
+            self.technology, self.olt_vendor_type)
+        # get resource from kv store
+        result = yield self._kv_store.get(path)
+        resource_range_config = result[0]
+
+        if resource_range_config is not None:
+            self.pon_resource_ranges = eval(resource_range_config.value)
+            self._log.debug("Init-resource-ranges-from-kvstore-success",
+                            pon_resource_ranges=self.pon_resource_ranges,
+                            path=path)
+            returnValue(True)
+
+        returnValue(False)
+
+    def init_default_pon_resource_ranges(self, onu_start_idx=1,
+                                         onu_end_idx=127,
+                                         alloc_id_start_idx=1024,
+                                         alloc_id_end_idx=65534,
+                                         gem_port_id_start_idx=1024,
+                                         gem_port_id_end_idx=16383,
+                                         num_of_pon_ports=16):
+        self._log.info("initialize-default-resource-range-values")
+        self.pon_resource_ranges[PONResourceManager.ONU_START_IDX] = onu_start_idx
+        self.pon_resource_ranges[PONResourceManager.ONU_END_IDX] = onu_end_idx
+        self.pon_resource_ranges[PONResourceManager.ALLOC_ID_START_IDX] = alloc_id_start_idx
+        self.pon_resource_ranges[PONResourceManager.ALLOC_ID_END_IDX] = alloc_id_end_idx
+        self.pon_resource_ranges[
+            PONResourceManager.GEM_PORT_ID_START_IDX] = gem_port_id_start_idx
+        self.pon_resource_ranges[
+            PONResourceManager.GEM_PORT_ID_END_IDX] = gem_port_id_end_idx
+        self.pon_resource_ranges[PONResourceManager.NUM_OF_PON_PORT] = num_of_pon_ports
+
+    def init_device_resource_pool(self):
+        i = 0
+        while i < self.pon_resource_ranges[PONResourceManager.NUM_OF_PON_PORT]:
+            self.init_resource_id_pool(
+                pon_intf_id=i,
+                resource_type=PONResourceManager.ONU_ID,
+                start_idx=self.pon_resource_ranges[
+                    PONResourceManager.ONU_START_IDX],
+                end_idx=self.pon_resource_ranges[
+                    PONResourceManager.ONU_END_IDX])
+
+            self.init_resource_id_pool(
+                pon_intf_id=i,
+                resource_type=PONResourceManager.ALLOC_ID,
+                start_idx=self.pon_resource_ranges[
+                    PONResourceManager.ALLOC_ID_START_IDX],
+                end_idx=self.pon_resource_ranges[
+                    PONResourceManager.ALLOC_ID_END_IDX])
+
+            self.init_resource_id_pool(
+                pon_intf_id=i,
+                resource_type=PONResourceManager.GEMPORT_ID,
+                start_idx=self.pon_resource_ranges[
+                    PONResourceManager.GEM_PORT_ID_START_IDX],
+                end_idx=self.pon_resource_ranges[
+                    PONResourceManager.GEM_PORT_ID_END_IDX])
+            i += 1
+
+    def clear_device_resource_pool(self):
+        i = 0
+        while i < self.pon_resource_ranges[PONResourceManager.NUM_OF_PON_PORT]:
+            self.clear_resource_id_pool(
+                pon_intf_id=i,
+                resource_type=PONResourceManager.ONU_ID,
+            )
+
+            self.clear_resource_id_pool(
+                pon_intf_id=i,
+                resource_type=PONResourceManager.ALLOC_ID,
+            )
+
+            self.clear_resource_id_pool(
+                pon_intf_id=i,
+                resource_type=PONResourceManager.GEMPORT_ID,
+            )
+            i += 1
+
+    @inlineCallbacks
+    def init_resource_id_pool(self, pon_intf_id, resource_type, start_idx,
+                              end_idx):
+        """
+        Initialize Resource ID pool for a given Resource Type on a given PON Port
+
+        :param pon_intf_id: OLT PON interface id
+        :param resource_type: String to identify type of resource
+        :param start_idx: start index for onu id pool
+        :param end_idx: end index for onu id pool
+        :return boolean: True if resource id pool initialized else false
+        """
+        status = False
+        path = self._get_path(pon_intf_id, resource_type)
+        if path is None:
+            returnValue(status)
+
+        # In case of adapter reboot and reconciliation resource in kv store
+        # checked for its presence if not kv store update happens
+        resource = yield self._get_resource(path)
+
+        if resource is not None:
+            self._log.info("Resource-already-present-in-store", path=path)
+            status = True
+        else:
+            resource = self._format_resource(pon_intf_id, start_idx, end_idx)
+            self._log.info("Resource-initialized", path=path)
+
+            # Add resource as json in kv store.
+            result = yield self._kv_store.put(path, resource)
+            if result is None:
+                status = True
+        returnValue(status)
+
+    @inlineCallbacks
+    def get_resource_id(self, pon_intf_id, resource_type, num_of_id=1):
+        """
+        Create alloc/gemport/onu id for given OLT PON interface.
+
+        :param pon_intf_id: OLT PON interface id
+        :param resource_type: String to identify type of resource
+        :param num_of_id: required number of ids
+        :return list/int/None: list, int or None if resource type is
+                               alloc_id/gemport_id, onu_id or invalid type
+                               respectively
+        """
+        result = None
+        path = self._get_path(pon_intf_id, resource_type)
+        if path is None:
+            returnValue(result)
+
+        resource = yield self._get_resource(path)
+        try:
+            if resource is not None and resource_type == \
+                    PONResourceManager.ONU_ID:
+                result = self._generate_next_id(resource)
+            elif resource is not None and (
+                    resource_type == PONResourceManager.GEMPORT_ID or
+                    resource_type == PONResourceManager.ALLOC_ID):
+                result = list()
+                while num_of_id > 0:
+                    result.append(self._generate_next_id(resource))
+                    num_of_id -= 1
+
+            # Update resource in kv store
+            self._update_resource(path, resource)
+
+        except BaseException:
+            self._log.exception("Get-" + resource_type + "-id-failed",
+                                path=path)
+        self._log.debug("Get-" + resource_type + "-success", result=result,
+                        path=path)
+        returnValue(result)
+
+    @inlineCallbacks
+    def free_resource_id(self, pon_intf_id, resource_type, release_content):
+        """
+        Release alloc/gemport/onu id for given OLT PON interface.
+
+        :param pon_intf_id: OLT PON interface id
+        :param resource_type: String to identify type of resource
+        :param release_content: required number of ids
+        :return boolean: True if all IDs in given release_content released
+                         else False
+        """
+        status = False
+        path = self._get_path(pon_intf_id, resource_type)
+        if path is None:
+            returnValue(status)
+
+        resource = yield self._get_resource(path)
+        try:
+            if resource is not None and resource_type == \
+                    PONResourceManager.ONU_ID:
+                self._release_id(resource, release_content)
+            elif resource is not None and (
+                    resource_type == PONResourceManager.ALLOC_ID or
+                    resource_type == PONResourceManager.GEMPORT_ID):
+                for content in release_content:
+                    self._release_id(resource, content)
+            self._log.debug("Free-" + resource_type + "-success", path=path)
+
+            # Update resource in kv store
+            status = yield self._update_resource(path, resource)
+
+        except BaseException:
+            self._log.exception("Free-" + resource_type + "-failed", path=path)
+        returnValue(status)
+
+    @inlineCallbacks
+    def clear_resource_id_pool(self, pon_intf_id, resource_type):
+        """
+        Clear Resource Pool for a given Resource Type on a given PON Port.
+
+        :return boolean: True if removed else False
+        """
+        path = self._get_path(pon_intf_id, resource_type)
+        if path is None:
+            returnValue(False)
+
+        result = yield self._kv_store.delete(path)
+        if result is None:
+            self._log.debug("Resource-pool-cleared", device_id=self.device_id,
+                            path=path)
+            returnValue(True)
+        self._log.error("Clear-resource-pool-failed", device_id=self.device_id,
+                        path=path)
+        returnValue(False)
+
+    def _generate_next_id(self, resource):
+        """
+        Generate unique id having OFFSET as start index.
+
+        :param resource: resource used to generate ID
+        :return int: generated id
+        """
+        pos = resource[PONResourceManager.POOL].find('0b0')
+        resource[PONResourceManager.POOL].set(1, pos)
+        return pos[0] + resource[PONResourceManager.START_IDX]
+
+    def _release_id(self, resource, unique_id):
+        """
+        Release unique id having OFFSET as start index.
+
+        :param resource: resource used to release ID
+        :param unique_id: id need to be released
+        """
+        pos = ((int(unique_id)) - resource[PONResourceManager.START_IDX])
+        resource[PONResourceManager.POOL].set(0, pos)
+
+    def _get_path(self, pon_intf_id, resource_type):
+        """
+        Get path for given resource type.
+
+        :param pon_intf_id: OLT PON interface id
+        :param resource_type: String to identify type of resource
+        :return: path for given resource type
+        """
+        path = None
+        if resource_type == PONResourceManager.ONU_ID:
+            path = self._get_onu_id_resource_path(pon_intf_id)
+        elif resource_type == PONResourceManager.ALLOC_ID:
+            path = self._get_alloc_id_resource_path(pon_intf_id)
+        elif resource_type == PONResourceManager.GEMPORT_ID:
+            path = self._get_gemport_id_resource_path(pon_intf_id)
+        else:
+            self._log.error("invalid-resource-pool-identifier")
+        return path
+
+    def _get_alloc_id_resource_path(self, pon_intf_id):
+        """
+        Get alloc id resource path.
+
+        :param pon_intf_id: OLT PON interface id
+        :return: alloc id resource path
+        """
+        return PONResourceManager.ALLOC_ID_POOL_PATH.format(
+            self.technology, self.device_id, pon_intf_id)
+
+    def _get_gemport_id_resource_path(self, pon_intf_id):
+        """
+        Get gemport id resource path.
+
+        :param pon_intf_id: OLT PON interface id
+        :return: gemport id resource path
+        """
+        return PONResourceManager.GEMPORT_ID_POOL_PATH.format(
+            self.technology, self.device_id, pon_intf_id)
+
+    def _get_onu_id_resource_path(self, pon_intf_id):
+        """
+        Get onu id resource path.
+
+        :param pon_intf_id: OLT PON interface id
+        :return: onu id resource path
+        """
+        return PONResourceManager.ONU_ID_POOL_PATH.format(
+            self.technology, self.device_id, pon_intf_id)
+
+    @inlineCallbacks
+    def _update_resource(self, path, resource):
+        """
+        Update resource in resource kv store.
+
+        :param path: path to update resource
+        :param resource: resource need to be updated
+        :return boolean: True if resource updated in kv store else False
+        """
+        resource[PONResourceManager.POOL] = \
+            resource[PONResourceManager.POOL].bin
+        result = yield self._kv_store.put(path, json.dumps(resource))
+        if result is None:
+            returnValue(True)
+        returnValue(False)
+
+    @inlineCallbacks
+    def _get_resource(self, path):
+        """
+        Get resource from kv store.
+
+        :param path: path to get resource
+        :return: resource if resource present in kv store else None
+        """
+        # get resource from kv store
+        result = yield self._kv_store.get(path)
+        resource = result[0]
+
+        if resource is not None:
+            # decode resource fetched from backend store to dictionary
+            resource = eval(resource.value)
+
+            # resource pool in backend store stored as binary string whereas to
+            # access the pool to generate/release IDs it need to be converted
+            # as BitArray
+            resource[PONResourceManager.POOL] = \
+                BitArray('0b' + resource[PONResourceManager.POOL])
+
+        returnValue(resource)
+
+    def _format_resource(self, pon_intf_id, start_idx, end_idx):
+        """
+        Format resource as json.
+
+        :param pon_intf_id: OLT PON interface id
+        :param start_idx: start index for id pool
+        :param end_idx: end index for id pool
+        :return dictionary: resource formatted as dictionary
+        """
+        # Format resource as json to be stored in backend store
+        resource = dict()
+        resource[PONResourceManager.PON_INTF_ID] = pon_intf_id
+        resource[PONResourceManager.START_IDX] = start_idx
+        resource[PONResourceManager.END_IDX] = end_idx
+
+        # resource pool stored in backend store as binary string
+        resource[PONResourceManager.POOL] = BitArray(end_idx).bin
+
+        return json.dumps(resource)