I have been struggling for a little while now to configure some trunks. I use two providers one is http://www.sipgate.co.uk for my incoming calls and the other is http://www.voipraider.com for my out going. For the life of me I have not been able to bring them up online. My setup is as follows:
Thomson router with with port forwarding set 5004-5082 to my Asterisk + FreePBX box ip and at the same time 10000-20000.
Setting from FreePBX
User Context: XXXXXX
FreePBX Version 188.8.131.52 downloaded as part of AsteriskNOW.