I'm seeing many issues about Blind Transfer not transferring and hanging up. I'm finding another problem. I've spent too many hours testing and trying to fix.
I am using the IVM v4.01 as a PBX. Calls come in via a SIP connection and are routed back out through the same SIP connection, which allows 2 simultaneous calls. What is suppose to happen is IVM calls the number to transfer the call to, connects the calls then leaves the communications and go back to idle. What actually happens is IVM calls the number to be transferred to, plays a Ringing.wav file then connects the calls once the phone has been picked up (so at this point as long as the call has been picked up, IVM will hang up and the 2 lines are now communicating) but if the call is not picked up by a person or picked up by voicemail, IVM plays the Ringing.wav file for 26 seconds then will hang up abruptly on both lines and the call is ended and the transfer is diconeected as well.
The log is:
14:22:32 Command - Transfer
14:22:32 Voip Blind Transfer To: 14168553840
14:22:32 Play system prompt: Ringing
14:22:32 Transferring sip call to: 14168553840
14:22:53 Play system prompt: Ringing
14:22:58 Error call attempt timed-out.
14:22:58 The server is not replying.
14:22:58 Call has disconnected
14:22:58 Call disconnected
I've checked every setting possible including leaving all fields blank in the Call Transfer Settings (it still transfers as long as someone engages the called number). I've tried Answer Detect Transfer, Simulate 3 party conference call, etc.