Dear Experts, I have an issue when trying to complete an off net to off net transfer for calls using Verizon SIP trunking,
When a Deskphone calls a PSTN number call connected then transfer it to another internal extension or Conference , I get the message cannot complete transfer on the phone and the transfered part of the call fails but the original call stays on hold. I did the following:- I have got the Block offnet to offnet transfer set to False on the CUCM, also I tried to do this voice service voip sip pass-thru content sdp Also let me tell you other sutff for help All the phones are 6945 , CIPC and Jabber I have tested the same situation with a Polycom Conference station that is registered to CUCM as 3rd Party SIP Endpoint everything is working perfect transfer to another extension and make a multiple conference with multiple PSTN numbers and internal extensions also other weird thing is If any Deskphone receive inbound PSTN call and transfer it to another extension then it works also but not calling outbound to PSTN and transfer. 6945 , CIPC and Jabber clients are doing the same issues while with 3rd Party Polycom conference everything works perfect I have traced in the phones and I don't get any acknowledgment it just try invite 3 times. What could be the issue? Many Thanks, Hesham
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