Webex Cloud CMR SIP video calls disconnect after 20 seconds

Hello

I am running version 9.1 with Exressway-C CUCM / 8.6 Expressway-E.  I have no problem doing business SIP video calls.  However when I make video calls on a site of WebEx CMR, the call becomes still cut off after 20 seconds.  It is audio and video for the first 20 seconds and then disconnects the call.

I was able to recreate this situation of 3 of my clients running CUCM version 9.

I have 2 clients running CUCM v10.5 and the issue is not the case.  I don't know if this question is 100% related to the CUCM version, but looks like a correlation obviouse.

I watched the SIP trace and it seems that the endpoint CUCM is end the call with normal call clearing.  I tried 8945 phones, jabber for iphones and a C40 and I get the same results.

If anyone has any ideas I would appreciate it.

Thank you.

Hello

Can you receive calls B2B? During the call set up, Webex will try to set up another session TCP inbound to your E Expressway on port 5060 and 5061, do you have this open to outside within the TCP sessions? (see page 5 of the CMR-Cloud deployment guide: http://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/sol...)

If they are open, the TCP session is configured for an incoming invitation with complete SDP of the TPS Cloud, you can check your sip max message size is located at 11000 - if you went from CUCM ~8.6 5000 was the default size and the default continues for an upgrade.  Check under system-> Service settings-> CUCM service-> show click on the button to display all options, and then check the size of incoming messages SIP advanced Max.

-Jonathan

Tags: Cisco Support

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