QSX:I found a easy fix for me last week. Add another 0 to port 5060, lol, so easy. My iTalk works well now, incoming calls OK for a few days, no problems. I don't know about my 2talk , its registered on the modem, but I don't use it, so I don't know if it works or not.
Or you can try 5060 --- 5070, or whatever voip port. And Please post the results here. I tried everything else, but nothing works, except this method.
Interesting. 2talk allow registration on 50600 which would place it above the SIP ALG. I was wondering this morning if that would work. I suspect changing the SIP AGL port may acheve the same result. I will try it soon. Thanks for sharing.
QSX
Incoming calls are fine. Its just that its annoying to have occational call drop, because of loss of VoIP connection. I think CG nat breaks it , then calls get dropped.