CUCM6.1 External to Internal Transfer No Ring-tone
My CM is connected to the PSTN via a SIP trunk with IOS router. When a call comes from OffNet(PSTN), I can blind-transfer the call back to an OffNet destination with no problem. The original caller can hear MoH and ringing tones before the destination is off hook. But if I transfer the call to another internal(OnNet) destination, the caller hears MoH while the transferred number is typed and then is left blank. The transfer can succeed but the caller just does not get any signal that the transfer is continuing.
Re: CUCM6.1 External to Internal Transfer No Ring-tone
The problem you are facing may be caused by CODEC mismatch between the devices. Also check if you have configured the command "progress_ind setup enable 3" on the gateway dial peer. If not configure the same.
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