09-26-2019 08:23 AM
Last night, we ported over our DID's from legacy ISDN/PRI to SIP trunks from PSTN. After doing so, our conference bridge from UCM to Lync will not connect. I suspect an incompatibility with the SIP trunks or profiles but cannot determine the cause. I am able to dial the internal route pattern to reach Lync successfully, but cannot connect from outside our cluster.
Previous call flow: PSTN>PRI>RouterH323>RoutePattern>SIPTrunk>LyncServer
Current call flow: PSTN>TelcoSIPTrunk>CUBE>SIPTrunk>RoutePattern>SIPTrunk>LyncServer
I see the call trying to connect in debugs but it never gets past the connecting status.
Any suggestions?
Solved! Go to Solution.
04-03-2020 06:02 AM
After much head banging and web sluething, I Was able to get this working finally by changing a setting in the SIP profile for the trunk. I set the "SIP Rel1xx Options" to "Send PRACK if 1xx Contains SDP"
09-26-2019 09:18 AM
09-26-2019 11:18 AM
CM traces show error code 400/Bad Request.
10-16-2019 07:53 AM
The bad request is coming from Lync:
55957829.001 |07:24:23.372 |AppInfo |SIPTcp - wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.1 on port 19918 index 382370
SIP/2.0 400 Bad Request
The 10.10.10.1 is the loopback on my CUBE router. I do not have that defined as a PSTN gateway in Lync, rather only my UCM servers are defined as gateways in Lync. Would I need to add the CUBE? I haven't been able to find docs to clarify this.
Thanks
10-17-2019 06:00 AM
03-31-2020 09:05 AM
Yes,we are sending full +e164
04-01-2020 08:26 AM
Let's see the actual debugs. We can't really comment on an error message out of context, especially a generic one. I think we want to see the SIP messages between CUCM and Lync.
04-03-2020 06:02 AM
After much head banging and web sluething, I Was able to get this working finally by changing a setting in the SIP profile for the trunk. I set the "SIP Rel1xx Options" to "Send PRACK if 1xx Contains SDP"
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