I've setup AS5400 as voice gateway with 10 T1, and on the IP side it has VoIP dial-peer pointed to the IVR. when I call the number, call is setup and active for 50 seconds and then disconnected. But I don't hear any prompt from IVR. I am sure IVR is working fine. Also when I do "debug voip rtp" I see rtp packet transmitting back and forth between IVR and Gateway but no audio. any suggestion would be very appreciated.