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.
ulaw coding is for North America ... I'm surprised you can used this system as the audio would be distorted with a companding mismatch. Try changing it back to 'compand-type a-law', and also add 'network-clock-select 1 e1 0/0/0' to sync the DSP's with the clocking coming in on the E1 interface.
What happens if you call a normal land line, not a cell phone ? Does it only happen with cell phones or with all outgoing calls?
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