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

[Michael T. Voity]

Hi Dan,


Last night I migrated to 10.5.2.SU2 and then this morning applied the 
ciscocm.FQDNwithDNS-v1.0.k3.cop.sgn patch.

On both CUCM and CS1000 we are using straight IP address and not a FQDN 
for comm.    Since I did this patch's I am going to let things bake and 
see if the error(s) returns.

I will keep my eyes on RTMT too see how things behave.

-Mike





Michael T. Voity
Network Engineer
University of Vermont
(802) 656-8112

On 7/14/2015 9:29 AM, Daniel Pagan wrote:
> Is your Nortel PBX sending a FQDN in the Contact header? This is important because in 10.5(2) CUCM performs a SRV and A Record lookup on FQDNs contained in a SIP Contact header. If this lookup fails, then expect to see a CANCEL followed by a BYE. I encountered this a few times over the past few months and ended up creating a defect against it. Check out CSCuu84269. If you want, I wouldn't mind taking a quick look at your detailed CCM SDL traces offline and letting you know if you're experiencing this defect. If you are, I'll send you a sample LUA script to use for converting the FQDN to IP address as a workaround which you can use for testing and workaround purposes (... and I can't guarantee this will work for you).
>
> Hope this helps.
>
> - Dan
>   
> -----Original Message-----
> From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Michael T. Voity
> Sent: Monday, July 13, 2015 9:56 AM
> To: voip puck
> Subject: [cisco-voip] Nortel 81C / CS1000 SIP Trunk to CUCM 10.5.2
>
> 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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