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Mitel Forums => Mitel MiVoice Business/MCD/3300 => Topic started by: pakman on March 03, 2018, 09:59:53 PM

Title: No 180 Ringing SDP (g711U telephone-event)
Post by: pakman on March 03, 2018, 09:59:53 PM

Hello,


I'm having an issue with a set of DIDs all at the same location. You don't hear any ring back when calling. The employee hears the phone ring. I have a few 100 DIDs from this particular vendor and no issues any where else. I have 4 resilient sites programmed off site A. The set of DIDs that's not working are programmed off site A. The 3 other resilient sites are also programmed off site A and they work fine. I get intermittent success when I reboot a piece of equipment and call one of the numbers I will get a ring back. However, the next call dead air. When comparing a wireshark capture between a working DID and non working. I noticed that our equipment never sends the 180 SDP (g711U telephone-event) to our providers adtran.

I changed the following in Sip Peer profile
Allow Using UPDATE For Early Media Renegotiation from no to yes
ignore SDP answers in provisional responses from no to yes

after I changed these I would get a ring back and then dead air.

appreciate any advice.

Thanks,

Title: Re: No 180 Ringing SDP (g711U telephone-event)
Post by: pakman on March 05, 2018, 02:49:38 PM

In the end the provider made some more changes which resolved my issue.