Having issues with a gateway that is setup as MGCP with 3 PRIs coming into it. Recently, there have been reports with two of the DIDs (that the client is aware of currently) where the call drops. In the Q.931 debugs, I see a mandatory information element missing message. It sounds remarkably like bug ID CSCtf08864, but the version of IOS they're running should have the fix for it (all the elements in the bug match the environment, though).
PRIs are configured as primary-ni. The only thing I saw that looked out of place was the service parameter for overlap receiving in CallManager is set to True by default. I did see a couple cases where disabling that seemed to fix the issue, but I'm not sure what the potential ramifications would be if I did change it (downtime, etc.).
CallManager version is 9.1.2, gateway IOS is 15.2M(5)
Any ideas are greatly appreciated
SJ
