Have a customer who has been upgraded to 4.2 and now has purchased SIP trunks from Bandwidth.com
5 trunks have been setup, and are only used for long distance outbound calls. We have issues with every out bound call, where after being answered, the call disconnects after ~22 seconds.
With Wireshark traces, we can see that the 3300 never send the ACK of the call to Bandwidth's Edgewater, so Bandwidth assumes that the call never connects and sends a Bye message. The 3300 does respond to the bye. Anyone seen or heard of something similar? I've got Mitel researching this, but they can't think of a reason for the issue.
I can attached the SIP message trace.