diff --git a/xos/synchronizer/pull_steps/pull_olts.py b/xos/synchronizer/pull_steps/pull_olts.py
index 370250d..7db872a 100644
--- a/xos/synchronizer/pull_steps/pull_olts.py
+++ b/xos/synchronizer/pull_steps/pull_olts.py
@@ -179,13 +179,13 @@
         for port in pon_ports:
             try:
                 model = PONPort.objects.filter(port_no=port["port_no"], olt_device_id=olt.id)[0]
-                log.debug("PONPort is new, creating it", port_no=port["port_no"], olt_device_id=olt.id)
+                log.debug("PONPort already exists, updating it", port_no=port["port_no"], olt_device_id=olt.id)
             except IndexError:
                 model = PONPort()
                 model.port_no = port["port_no"]
                 model.olt_device_id = olt.id
                 model.name = port["label"]
-                log.debug("PONPort already exists, updating it", port_no=port["port_no"], olt_device_id=olt.id)
+                log.debug("PONPort is new, creating it", port_no=port["port_no"], olt_device_id=olt.id)
 
             model.admin_state = port["admin_state"]
             model.oper_status = port["oper_status"]
@@ -200,14 +200,14 @@
             try:
                 model = NNIPort.objects.filter(port_no=port["port_no"], olt_device_id=olt.id)[0]
                 model.xos_managed = False
-                log.debug("NNIPort is new, creating it", port_no=port["port_no"], olt_device_id=olt.id)
+                log.debug("NNIPort already exists, updating it", port_no=port["port_no"], olt_device_id=olt.id)
             except IndexError:
                 model = NNIPort()
                 model.port_no = port["port_no"]
                 model.olt_device_id = olt.id
                 model.name = port["label"]
                 model.xos_managed = False
-                log.debug("NNIPort already exists, updating it", port_no=port["port_no"], olt_device_id=olt.id)
+                log.debug("NNIPort is new, creating it", port_no=port["port_no"], olt_device_id=olt.id)
 
             model.admin_state = port["admin_state"]
             model.oper_status = port["oper_status"]
diff --git a/xos/synchronizer/steps/sync_onu_device.py b/xos/synchronizer/steps/sync_onu_device.py
new file mode 100644
index 0000000..579c13e
--- /dev/null
+++ b/xos/synchronizer/steps/sync_onu_device.py
@@ -0,0 +1,44 @@
+# 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.
+
+import os, sys
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from helpers import Helpers
+
+import requests
+from multistructlog import create_logger
+from requests.auth import HTTPBasicAuth
+from synchronizers.new_base.modelaccessor import ONUDevice, model_accessor
+from synchronizers.new_base.syncstep import SyncStep
+from xosconfig import Config
+
+log = create_logger(Config().get("logging"))
+
+class SyncONUDevice(SyncStep):
+    provides = [ONUDevice]
+
+    observes = ONUDevice
+
+    def sync_record(self, o):
+
+        if o.admin_state == "DISABLED":
+            volt_service = o.pon_port.olt_device.volt_service
+            voltha = Helpers.get_voltha_info(volt_service)
+
+            log.info("Disabling device %s in voltha" % o.device_id)
+            request = requests.post("%s:%d/api/v1/devices/%s/disable" % (voltha['url'], voltha['port'], o.device_id))
+
+            if request.status_code != 200:
+                raise Exception("Failed to disable ONU device: %s" % request.text)
\ No newline at end of file
diff --git a/xos/synchronizer/steps/test_sync_onu_device.py b/xos/synchronizer/steps/test_sync_onu_device.py
new file mode 100644
index 0000000..85a4021
--- /dev/null
+++ b/xos/synchronizer/steps/test_sync_onu_device.py
@@ -0,0 +1,115 @@
+# 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.
+
+import unittest
+from mock import patch, call, Mock, PropertyMock
+import requests_mock
+
+import os, sys
+
+# Hack to load synchronizer framework
+test_path=os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
+xos_dir=os.path.join(test_path, "../../..")
+if not os.path.exists(os.path.join(test_path, "new_base")):
+    xos_dir=os.path.join(test_path, "../../../../../../orchestration/xos/xos")
+    services_dir = os.path.join(xos_dir, "../../xos_services")
+sys.path.append(xos_dir)
+sys.path.append(os.path.join(xos_dir, 'synchronizers', 'new_base'))
+# END Hack to load synchronizer framework
+
+# generate model from xproto
+def get_models_fn(service_name, xproto_name):
+    name = os.path.join(service_name, "xos", xproto_name)
+    if os.path.exists(os.path.join(services_dir, name)):
+        return name
+    else:
+        name = os.path.join(service_name, "xos", "synchronizer", "models", xproto_name)
+        if os.path.exists(os.path.join(services_dir, name)):
+            return name
+    raise Exception("Unable to find service=%s xproto=%s" % (service_name, xproto_name))
+# END generate model from xproto
+
+class TestSyncVOLTServiceInstance(unittest.TestCase):
+    def setUp(self):
+
+        self.sys_path_save = sys.path
+        sys.path.append(xos_dir)
+        sys.path.append(os.path.join(xos_dir, 'synchronizers', 'new_base'))
+
+        # Setting up the config module
+        from xosconfig import Config
+        config = os.path.join(test_path, "../model_policies/test_config.yaml")
+        Config.clear()
+        Config.init(config, "synchronizer-config-schema.yaml")
+        # END Setting up the config module
+
+        from synchronizers.new_base.syncstep import DeferredException
+        from synchronizers.new_base.mock_modelaccessor_build import build_mock_modelaccessor
+        # build_mock_modelaccessor(xos_dir, services_dir, [get_models_fn("olt-service", "volt.xproto")])
+
+        # FIXME this is to get jenkins to pass the tests, somehow it is running tests in a different order
+        # and apparently it is not overriding the generated model accessor
+        build_mock_modelaccessor(xos_dir, services_dir, [get_models_fn("olt-service", "volt.xproto"),
+                                                         get_models_fn("vsg", "vsg.xproto"),
+                                                         get_models_fn("../profiles/rcord", "rcord.xproto")])
+        import synchronizers.new_base.modelaccessor
+        from sync_onu_device import SyncONUDevice, model_accessor
+
+        # import all class names to globals
+        for (k, v) in model_accessor.all_model_classes.items():
+            globals()[k] = v
+
+        self.sync_step = SyncONUDevice
+
+        volt_service = Mock()
+        volt_service.voltha_url = "voltha_url"
+        volt_service.voltha_port = 1234
+        volt_service.voltha_user = "voltha_user"
+        volt_service.voltha_pass = "voltha_pass"
+
+        self.o = Mock()
+        self.o.device_id = "test_id"
+        self.o.pon_port.olt_device.volt_service = volt_service
+
+    def tearDown(self):
+        self.o = None
+        sys.path = self.sys_path_save
+
+    @requests_mock.Mocker()
+    def test_do_nothing(self, m):
+        self.o.admin_state = "ENABLED"
+        self.sync_step().sync_record(self.o)
+        self.assertFalse(m.called)
+
+    @requests_mock.Mocker()
+    def test_disable(self, m):
+        m.post("http://voltha_url:1234/api/v1/devices/test_id/disable")
+
+        self.o.admin_state = "DISABLED"
+        self.sync_step().sync_record(self.o)
+        self.assertTrue(m.called)
+
+    @requests_mock.Mocker()
+    def test_disable_fail(self, m):
+        m.post("http://voltha_url:1234/api/v1/devices/test_id/disable", status_code=500, text="Mock Error")
+
+        self.o.admin_state = "DISABLED"
+
+        with self.assertRaises(Exception) as e:
+            self.sync_step().sync_record(self.o)
+            self.assertTrue(m.called)
+            self.assertEqual(e.exception.message, "Failed to disable ONU device: Mock Error")
+
+if __name__ == "__main__":
+    unittest.main()