Inbound Call Problems

Heya everyone… i got a slight problem

My outgoing calls work fine, but i got a slight problem with incoming calls, im running Asterisk (Ver. SVN-branch-1.2-r74427), with FreePBX 2.2.2

iv got an outbound trunk through VoIPCheap, and 3 incoming number from VoIPTalk

the voiptalk numbers are being routed to a SIP Compatible PBX, then using “inbound routes” inside freepbx the numbers are entered into the “DID Number” and set to goto the correct extension !

Unfortunatly, if someone calls into any of those numbers, they can hear me fine ! but i cannot hear anything they are saying and then after 20 seconds (exactly, every time) it closes the channel, which results in the calling party’s phone still appearing to be on a call (hence when i call from my mobile, the line stays active but my FreePBX asterisk info module reports no active channels)

Anyone got any ideas, im a complete newby at this, and followed this installation guide to get to where i am “” but did not do addition configuration to zaptel as i dont think im using this, just SIP Trunks to voipCheap !

Check out my Asterisk Log File at