I have a scenario where I have a 2 CUCM with only Publisher in each cluster and connected via IP, where the endpoints are a combination of the following
cisco 9951
cisco 6921
cisco 6911
Tandberg c60
Tandberg mxp
I add an intercluster trunk from one cucm cluster to another vice versa,add route pattern from each cluster pointing to the trunk of the other cluster.The only test I have done so far is a video call from cisco 9951 from cluster A to Tandberg c60 from cluster B, at first the c60 rings but when the auto answer initaite, the call suddenly drops. I've tested the other way around where the call starts from Tandberg c60 to cisco 9951, the 9951 rings and when I answer the call, it gives me a fast busy tone as well.
Whant might be causing the disconnect or fast busy tone whenever the call gets answered? What troubleshooting can I do to isolate the problem? I'm guessing that there is no connectivity between the endspoints lan ip address but when I try to ping from Cluster A's lan to Cluster B's lan and vice versa, it has no issues at all
I have not yet tried to test the other phones but I'm guessing it has the same issues
