Mitel SIP trunk ending calls in 30sec

[ntnher@yahoo.com]

Got my UCM6202 setup and SIP trunk to Mitel 3300 via SIP peer. No authentication. Same issue, active picked up calls only last 30sec.

I'm thinking since there is no issue on SIP trunk between Issabel PBX and Mitel 3300, I'm going to trunk the UCM6308 to Issabel PBX. Then have the Issabel PBX in the middle relaying calls between the Mitel 3300 and UCM6308.

UCM6308   <----------sip trunk--------->   Issabel PBX   <----------sip trunk----------->   Mitel 3300 <-----PRI----------> Outside Provider.

[ntnher@yahoo.com]

UCM6308   <----------sip trunk--------->   Issabel PBX   <----------sip trunk----------->   Mitel 3300 <-----PRI----------> Outside Provider.

I got it to work this way, everything is able to talk to each other.