Mitel MCD SIP No Audio on Incoming Calls

[trapshooter]

I have a VMCD and a VMBG with SIP trunks. The VMBG is set up in the DMZ behind a NAT. Using the VMBG for the SIP trunking. I have two issues; 1. Calls come in and connect but no audio eithe way. 2. Outgoing calls sound great both ways but afte 30 seconds or so the call is dropped. Any ideas

 

[nekminnit]

You're not using wireless handsets are you?

Don't confuse DTMF with DTF. They have very different meanings....

 

[trapshooter]

No. 5330e All Teleworker

 

[LoopyLou]

Firewall allowing traffic to the 3300 ( allows call setup ) but not allowing it to the subnets containing phones?

The beatings will continue until morale improves.

 

[bobcheese]

calls cutting off is likely to be session timer if it always the same length.