2010/5/11 Jignesh Gandhi Jignesh.Gandhi@moviuscorp.com:
Can I do something like following with OpenSER/Kamailio ?
UA-2 calls UA-1 and a call is established.. UA-1 puts UA-2 on hold and calls out to UA-3, Once UA-3 anwers , UA-1 puts that call on hold as well. At this point , UA-1 sends A REFER to OpenSER, to refer UA-2 to UA-3. Basically before connecting the UA-2 to UA-3, UA-1 wants to get out of the call path and have UA-2 and UA-3 talk to each other directly.( basically a consultative call xfer ). So OpenSER will have to do 2 Re-Invites and also respond back to UA-1 with NOTIFY and status of the RE-Invites( one with SDP and one without ).
You are wrong. UA-1 won't send a REFER to Kamailio, but to UA-2. All you describe will work perfectly as a proxy doesn't require to "support" REFER, but instead thread it as *any* other in-dialog request.
Regards.