diff --git a/python/adapters/openolt/openolt_bw.py b/python/adapters/openolt/openolt_bw.py
new file mode 100644
index 0000000..7c70b78
--- /dev/null
+++ b/python/adapters/openolt/openolt_bw.py
@@ -0,0 +1,41 @@
+#
+# 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.
+#
+
+DEFAULT_ONU_BW_PROFILE = "default"
+DEFAULT_ONU_PIR = 1000000  # 1Gbps
+
+
+class OpenOltBW(object):
+
+    def __init__(self, log, proxy):
+        self.log = log
+        self.proxy = proxy
+
+    def pir(self, serial_number):
+        bw = 0
+        try:
+            bw = self.proxy.get(
+                '/traffic_descriptor_profiles/{}'.format(serial_number))
+        except KeyError:
+            self.log.debug('bandwidth not configured',
+                          serial_number=serial_number)
+            try:
+                bw = self.proxy.get('/traffic_descriptor_profiles/{}' \
+                                    .format(DEFAULT_ONU_BW_PROFILE))
+            except KeyError:
+                return DEFAULT_ONU_PIR
+
+        return bw.maximum_bandwidth