Hi,
I have recently deployed CUCM 11.5 with Expressway-C & E with CMS and have a couple Telepresnence Video systems registered to CUCM. Directory numbers have been associated to the units and units are registered. when attempting to dial the DN i recieve the below when looking at the call logs:

This occurs on all endpoints that are registered. I have searched CUCM top to bottom trying to find a reason for this as well at the endpoint as it seems the CUCM is acknowledging the call but the receiving party may be rejecting it.
Any Ideas?
Thanks.