CCM 4.1(3) 2851 12.4(25b)
User at remote site tries to transfer a call from the PSTN to another site.
Call arrives at remote phone, but no audio in either direction. (No re-order or anything, just dead air)
Call information appears on destination phone. (Call appears to be active)
Conference works fine, problem is only with transfer.
Gateway is using MGCP, G.729 inter region.
Local DSPs are used for transcoding and they are registered in CCM
I am going to have the customer switch the codec to G.711 and see if the issue remains. I am leaning towards a transcoding issue, but usually this would result in a fast busy. I have verified the voice path between endpoints and to the CCM.
Any help is appreciated.