Calls disconnecting after 30 seconds on SIP trunks

[Darby123]

This problem occurs on IP500 V2 - we have just migrated a SIP account on this system from Username/password authentication to purely IP address authentication. Since then on some calls the call disconnects exactly 30 seconds after being answered. This doesn't happen on every call and sometimes they can go hours without a disconnect, then for periods of time it is on every call. We have upgraded the software from version 7 to version 9 just to be sure and the problem still occurs. We suspect the issue lies with the SIP provider Gamma but they are denying this - any thoughts would be appreciated?

APSS
PASMI

Aastra Accredited Expert

 

[hairlessupportmonkey]

Enable RTP keep alives on the IPO. I suspect the calls drop due to lack of activity. It could also be your firewall / proxy dropping the connection too.

ACSS - SME
General Geek

 

[holdmusic34]

Agreed.