I started having problems with my external incoming calls. I am able to route/answer all calls coming in and talk for exactly 15mins and then they drop. All of my outbound calls to external numbers work just fine for as long as I want.
I am using a SIP line from Quantum Voice which I haven't had any problem with since. Not sure if it is a problem with my trixbox or a problem with my SIP Provider.
Here is my User Details under Incoming Settings within the Trunk setup page of Trixbox CE.
If looking at the Peer Details will help let me know