Call routes

[bwaweru@gmail.com]

I am new here and am not sure if this is the write forum for my question.

What could be the issue when a Cisco router 4331 has a working call flow between the gateway and the PABX. However as soon as the call routes to the phone am losing the traffic and there is no communication between the gateway and the phone and hence a one-way speech. No packets are being received by the Phones from the gateway.

[Dennis Mink]

This is very likely related to RTP traffic not being able to set up end to end, most likely due to routing.

you would need to provide us with SIP debugs to see where the RTP is attempted to be terminated.