2009/1/19 Simon Shaw <[email protected]>: > All, > > I am looking for the SIP standard/draft that defines how an ad-hoc > conference should be initiated where the focus is not one of the > original users as follows: > > 1) Alice is talking to Bob in a standard P2P call (RTP flowing in > both directions between Alice and Bob) > > 2) Alice invites Charlie to join Alice and Bob in the call. (not > sure how this is done) > > 3) After Charlie answers his phone and the media channels have been > set up between Charlie and the conferencing server (which is a separate > application not connected to either Alice or Bob), both Alice and Bob's > call are somehow transferred to the correct conferencing resource on the > conference server where Charlie will be waiting for them. In the > process of Alice's and Bob's transfer the initial media channels should > stay connected as long as possible before the actual transfer so that > Alice and Bob will not detect any unnatural break in the audio.
Not sure if the above scenario is really possible with current specifications. Some phones implement 3-way conferencing by acting as conference server, this is: - Alice speaking with Bob. - Alice calls Carol and Carol accepst the call. - Alice press some button and her phone starts mixing both audio flows. They are in fact 2 different dialogs but the RTP is bridged in Alice's phone. Obviously this is not specified in a RFC but a phone propietary implementation. But what you mean is not possible IMHO. -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
