I am using this as a FXO adaptor. It seems that if the outside caller puts me on silent hold, the call drops after 60 seconds. I am using Asterisk, and have checked sip session timers, and rtp timers, and increased them all to 3 minutes, but there is no change in the dropped calls.
I have noticed there is a TimerT2 and timerT.... so many - but there doesnt seem to be any documentation on this parameter, do I need to change one of these to increase an rtp timeout issue, or what might be causing the hangup?