Tony Posted January 21, 2008 Report Share Posted January 21, 2008 With our old Panasonic PBX system, we could transfer an external call to an external number using Flash and then dial the number. After the transfer was complete, all of our incoming lines were clear (I am guessing that the transfer is handled by the PSTN line provider). With pbxnsip, when I forward to an external number, it uses a second channel to make the outgoing call. This now ties up two PSTN lines (versus zero with the old system) for the duration of the call. Is there anyway to configure the software to perform an external call transfer? Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 22, 2008 Report Share Posted January 22, 2008 Well, in theory SIP offers a method called REFER that would do the same thing on a SIP trunk. The reality is that practically no SIP trunk provider supports this today. My impression is that it has just too many security and payment issues so it scares the trunking providers off. Quote Link to comment Share on other sites More sharing options...
Tony Posted January 22, 2008 Author Report Share Posted January 22, 2008 Maybe I am misunderstanding something with the last reply but I do not have a SIP trunk provider or billing issues to deal with. I have a PSTN gateway (Grandstream GXW4104) with 4 lines feeding it. I need to flash the current line and dial the destination number. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 22, 2008 Report Share Posted January 22, 2008 Oh, does the Grandstream support REFER? I would a be little bit surprised if it does and forwards the redirection request via FXO to the carrier. The other problem is that this stops call recording, and it is also impossible to keep the CDR for this redirected call. And you cannot barge into a call. Quote Link to comment Share on other sites More sharing options...
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