[cisco-voip] Nortel 81C / CS1000 SIP Trunk to CUCM 10.5.2

[Michael T. Voity]

That's the one thing I  do not have.       It unpredictable when it 
happens.   NateCCIE responded to me off list indicating I should upgrade 
to 10.5.2SU2 and apply the COP.   He indicated that there is a bug where 
CS1000 and CM don't play nice.

-Mike

Michael T. Voity
Network Engineer
University of Vermont
On 7/13/2015 3:36 PM, Mark Holloway wrote:

> Do you have a Wireshark capture of the SIP signaling for a failed call?
>
>
>> On Jul 13, 2015, at 9:55 AM, Michael T. Voity <mvoity at uvm.edu> wrote:
>>
>> Hello,
>>
>> Before we installed our Cisco CM 10.5.2 system everything here at the University is fed from a Nortel Avaya 81c / CS1000 system.   The Telcom group has a bunch of systems on it that support SIP and SIP gateways.   We setup a SIP trunk between the two systems from a guide that Avaya provided.   It works fine like 99% of the time.
>>
>> I am finding that I have to reset the SIP trunk every couple of days because it looks like the Nortel is busying out all the channels and it can only pass certain traffic.   Example is that someone from Nortel land dials a 5 digit extension that has been routed to CUCM, the line on CUCM rings once and then discos the call.
>>
>> Looking at RTMT on the SIP traffic I can tell that the Nortel is sending the "BYE" message on the trunk right when the CUCM sends the "RINGING"   The only way that I have found to correct this is to reset the SIP trunk from CUCM.
>>
>> Has anyone see an issue like this and or heard of this?
>>
>> Any ideas would be helpful!
>>
>> -Mike
>>
>> -- 
>> Michael T. Voity
>> Network Engineer
>> University of Vermont
>>
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