diff --git a/adapters/adtran_common/xpon/__init__.py b/adapters/adtran_common/xpon/__init__.py
new file mode 100644
index 0000000..b0fb0b2
--- /dev/null
+++ b/adapters/adtran_common/xpon/__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/adapters/adtran_common/xpon/best_effort.py b/adapters/adtran_common/xpon/best_effort.py
new file mode 100644
index 0000000..99622af
--- /dev/null
+++ b/adapters/adtran_common/xpon/best_effort.py
@@ -0,0 +1,47 @@
+# Copyright 2017-present Adtran, Inc.
+#
+# 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 json
+
+log = structlog.get_logger()
+
+
+class BestEffort(object):
+    def __init__(self, bandwidth, priority, weight):
+        self.bandwidth = bandwidth   # bps
+        self.priority = priority     # 0.255
+        self.weight = weight         # 0..100
+
+    def __str__(self):
+        return "BestEffort: {}/p-{}/w-{}".format(self.bandwidth,
+                                                 self.priority,
+                                                 self.weight)
+
+    def to_dict(self):
+        val = {
+            'bandwidth': self.bandwidth,
+            'priority': self.priority,
+            'weight': self.weight
+        }
+        return val
+
+    def add_to_hardware(self, session, pon_id, onu_id, alloc_id, best_effort):
+        from ..adtran_olt_handler import AdtranOltHandler
+
+        uri = AdtranOltHandler.GPON_TCONT_CONFIG_URI.format(pon_id, onu_id, alloc_id)
+        data = json.dumps({'best-effort': best_effort.to_dict()})
+        name = 'tcont-best-effort-{}-{}: {}'.format(pon_id, onu_id, alloc_id)
+
+        return session.request('PATCH', uri, data=data, name=name)
diff --git a/adapters/adtran_common/xpon/gem_port.py b/adapters/adtran_common/xpon/gem_port.py
new file mode 100644
index 0000000..14dccb1
--- /dev/null
+++ b/adapters/adtran_common/xpon/gem_port.py
@@ -0,0 +1,63 @@
+# Copyright 2017-present Adtran, Inc.
+#
+# 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.
+
+
+class GemPort(object):
+    """
+    Class to wrap TCont capabilities
+    """
+    def __init__(self, gem_id, alloc_id, uni_id, tech_profile_id,
+                 encryption=False,
+                 multicast=False,
+                 traffic_class=None,
+                 handler=None,
+                 is_mock=False):
+
+        self.gem_id = gem_id
+        self._alloc_id = alloc_id
+        self.uni_id = uni_id
+        self.tech_profile_id = tech_profile_id
+        self.traffic_class = traffic_class
+        self._encryption = encryption
+        self.multicast = multicast
+        self._handler = handler
+        self._is_mock = is_mock
+        self.tech_profile_id = None     # TODO: Make property and clean up object once tech profiles fully supported
+
+        # Statistics
+        self.rx_packets = 0
+        self.rx_bytes = 0
+        self.tx_packets = 0
+        self.tx_bytes = 0
+
+    def __str__(self):
+        return "GemPort: alloc-id: {}, gem-id: {}, uni-id: {}".format(self.alloc_id,
+                                                                      self.gem_id,
+                                                                      self.uni_id)
+
+    @property
+    def alloc_id(self):
+        return self._alloc_id
+
+    @property
+    def encryption(self):
+        return self._encryption
+
+    def to_dict(self):
+        return {
+            'port-id': self.gem_id,
+            'alloc-id': self.alloc_id,
+            'encryption': self._encryption,
+            'omci-transport': False
+        }
diff --git a/adapters/adtran_common/xpon/tcont.py b/adapters/adtran_common/xpon/tcont.py
new file mode 100644
index 0000000..79d94fa
--- /dev/null
+++ b/adapters/adtran_common/xpon/tcont.py
@@ -0,0 +1,29 @@
+# Copyright 2017-present Adtran, Inc.
+#
+# 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.
+
+
+class TCont(object):
+    """
+    Class to wrap TCont capabilities
+    """
+    def __init__(self, alloc_id, tech_profile_id, traffic_descriptor, uni_id, is_mock=False):
+        self.alloc_id = alloc_id
+        self.traffic_descriptor = traffic_descriptor
+        self._is_mock = is_mock
+        self.tech_profile_id = tech_profile_id
+        self.uni_id = uni_id
+
+    def __str__(self):
+        return "TCont: alloc-id: {}, uni-id: {}".format(self.alloc_id,
+                                                        self.uni_id)
diff --git a/adapters/adtran_common/xpon/traffic_descriptor.py b/adapters/adtran_common/xpon/traffic_descriptor.py
new file mode 100644
index 0000000..230605b
--- /dev/null
+++ b/adapters/adtran_common/xpon/traffic_descriptor.py
@@ -0,0 +1,75 @@
+# Copyright 2017-present Adtran, Inc.
+#
+# 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
+
+
+class TrafficDescriptor(object):
+    """
+    Class to wrap the uplink traffic descriptor.
+    """
+    class AdditionalBwEligibility(Enum):
+        NONE = 0
+        BEST_EFFORT_SHARING = 1
+        NON_ASSURED_SHARING = 2             # Should match xpon.py values
+        DEFAULT = NONE
+
+        @staticmethod
+        def to_string(value):
+            return {
+                TrafficDescriptor.AdditionalBwEligibility.NON_ASSURED_SHARING: "non-assured-sharing",
+                TrafficDescriptor.AdditionalBwEligibility.BEST_EFFORT_SHARING: "best-effort-sharing",
+                TrafficDescriptor.AdditionalBwEligibility.NONE: "none"
+            }.get(value, "unknown")
+
+        @staticmethod
+        def from_value(value):
+            """
+            Matches both Adtran and xPON values
+            :param value:
+            :return:
+            """
+            return {
+                0: TrafficDescriptor.AdditionalBwEligibility.NONE,
+                1: TrafficDescriptor.AdditionalBwEligibility.BEST_EFFORT_SHARING,
+                2: TrafficDescriptor.AdditionalBwEligibility.NON_ASSURED_SHARING,
+            }.get(value, TrafficDescriptor.AdditionalBwEligibility.DEFAULT)
+
+    def __init__(self, fixed, assured, maximum,
+                 additional=AdditionalBwEligibility.DEFAULT,
+                 best_effort=None):
+        self.fixed_bandwidth = fixed       # bps
+        self.assured_bandwidth = assured   # bps
+        self.maximum_bandwidth = maximum   # bps
+        self.additional_bandwidth_eligibility = additional
+        self.best_effort = best_effort\
+            if additional == TrafficDescriptor.AdditionalBwEligibility.BEST_EFFORT_SHARING\
+            else None
+
+    def __str__(self):
+        return "TrafficDescriptor: {}/{}/{}".format(self.fixed_bandwidth,
+                                                    self.assured_bandwidth,
+                                                    self.maximum_bandwidth)
+
+    def to_dict(self):
+        val = {
+            'fixed-bandwidth': self.fixed_bandwidth,
+            'assured-bandwidth': self.assured_bandwidth,
+            'maximum-bandwidth': self.maximum_bandwidth,
+            'additional-bandwidth-eligibility':
+                TrafficDescriptor.AdditionalBwEligibility.to_string(
+                    self.additional_bandwidth_eligibility)
+        }
+        return val
+