WE have been troubleshooting a complex issue by where transcoder is not being invoked for WAN calls. TAC has recommended we attempt to take the transcoder registration off callmanager, and put this transcoder solely registered to the h323 gateway. Is that possible? I know if we were running CME it would be done this way, but is it possible when using CCM with h323 gateway?
Our problem is we need an MTP for supplementary services (other side doesn't support h323 v2). So we have the MTP checkbox selected on gateway page in CCM. Region between phones and software MTP is G711. Region between phones and MTP-Xcode is G711. Region between gateway and MTP's is G711. Gateway is set to use G729. Trace files reveal that the transcoder is not being invoked.