Intermittent one-way audio with CUCM 7 and SIP trunk to CUBE

[fieryhail]

I have a single SIP trunk setup right now from Bandwidth.com. c3745, IOS 12.4.15-T8 AdvEnterprise. I know I don't have access to the midcall signalling pass-thru command in this verion of IOS, that's planned when router is upgraded. I was working fine with sip - h.323, full 2 way audio, calls transferred fine, MOH worked fine, hold/resumed worked fine. I'm trying to setup CUCM to connect to CUBE via SIP trunk instead of h.323.

When I place a call from PSTN to CUCM I get 2 way audio, I place the call on hold from IP Phone, then resume, there is one-way audio. The strange part is that when I place call on hold AGAIN and resume, 2 way audio again as normal. Repeated placing call on hold/resume causes the cycle to continue. I was having issues with disconnects before I placed the statements

no supplementary-service sip moved-temporarily
no supplementary-service sip refer

under voice services section. That enabled calls to ork fine as a temporary fix. Not sure what is causing this issue, probably something simple but have been unable to track it down as of yet. Any thoughts? Attached is a file of ccsip messages debug output from the call. Any other debug that would assist I'll be happy to generate and attach. Thanks again!

 

[scottb14]

Hi Fieryhail,

Did you find the root cause with this issue?

which ver of CUCM are you using exactly?

We are experiencing a similar issue to this.

Regards,
Scott

 

[ADB100]

I had an issue a couple of months ago with calls only working one way - i.e. I could make calls but not receive them (or the other way round?). It was an issue with the SIP provider using different sources for the signalling and RTP. I upgraded the IOS to 15.1 and everthing kicking into life.

Andy