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New Member

CUCM 9/SIP incoming calls failing

Just recently incoming calls started to fail and I see this in the logs:

1795163: Jul  6 02:43:13.119: //986339/DF74C88A8723/SIP/Msg/ccsipDisplayMsg:


SIP/2.0 503 Service Unavailable

Via: SIP/2.0/UDP;branch=z9hG4bK2BCD18BD

From: sip:0014109809147@;tag=330A21FC-891

To: <sip:32590430@>;tag=998350446

Date: Sat, 06 Jul 2013 00:43:13 GMT

Call-ID: DF787212-E50B11E2-872BE487-4584BD02@

CSeq: 101 INVITE

Allow-Events: presence

Warning: 399 cucm-01 "Unable to find a device handler for the request received on port 58741 from" is the 2911 where the SIP trunk terminates and these logs are coming from. Nothing has changed and not sure what the issue is. 

Can someone help me out?

New Member

Re: CUCM 9/SIP incoming calls failing

I was able to resolve this by updating the SIP trunk in CUCM to use  as the destination instead of the public IP of the SIP trun.  Although I am not sure what changed?  I have two CUCM servers and not sure if they were out of sync?  After I changed the IP on one of them I checked the other and it had the same IP.  Unsure whether or not it always did or it synced.

Hopefully this helps someone in the future. 

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