I will need some help, I have a gateway 2811(1 VWIC2-1Mft-E1, 8 FXO) configured with MGCP and a CCM 6.1.2.
When I try to make a call from the IP Phone to the cell phone, after I answer I don't hear anything (no voice). If I make a call from the cell to the IP Phone all it's ok I can hear the pearson. From time to time when I reset the gateway I have a conversation in both ways but just once, when I hang up and try to call another time there's no voice again. I will attach the gateway config.
The config you posted was kind of jumbled up, but in reading through it, it doesnt appear that you have media and control traffic bound to any interface. Try adding these commands to your config:
mgcp bind control source-interface [interface]
mgcp bind media source-interface [interface]
Hope that helped