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New Member

CUCM-> VCS->VCS Express



I want to understand the call flow from CUCM to VCS to VCS-express and vice versa.  Like to make a video call from Cisco IP Phone to endpoint out of the organization, the call flow will be as the following:

From the IP Phone dial:

The address will match SIP Route Pattern *  to SIP trunk to VCS. In VCS search rule to traversal zone … etc.



Please help me to complete the call flow and correct me if I am wrong.




That is the correct call flow

That is the correct call flow. You will have a SIP trunk from CUCM to VCS IP and also zones and search rules on the VCS to call back. 

Check this guide out:


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New Member

thank you for your reply I

thank you for your reply


I have read this document before, it is for CUCM to VCS only no VCS express

Correct, use the above

Correct, use the above document for calls from CUCM to VCS.

For VCS to VCS Expressway, use this document:

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New Member

I think I need this only with

I think I need this only with version 7 with 8 I should integrate VCS with expressway in other way.

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