On Wed, Jan 28, 2009 at 12:59 PM, Avasarala Ranjit-A20990 <ran...@motorola.com> wrote: > So based on this, now which would be the recommended approach for realizing a > Click2Dial application? Using a B2BUA (3PCC) as explained in 3725 or the > refer example in 5359? > >
Depends upon whether the endpoint supports REFER based redirection. > Regards > Ranjit > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Iñaki > Baz Castillo > Sent: Wednesday, January 28, 2009 11:26 PM > To: Brett Tate > Cc: sip-implementors > Subject: Re: [Sip-implementors] Initial REFER vs RFC 3725 (Third > PartyCallControl) > > 2009/1/28 Iñaki Baz Castillo <i...@aliax.net>: >> Hi, that's not necessary at all as it's already documented in the same >> RFC 3515 (REFER method): >> >> http://tools.ietf.org/html/rfc3515#section-4.1 > > And it's also fully explained and documented in RFC 5359 "Session Initiation > Protocol Service Examples": > > http://tools.ietf.org/html/rfc5359#section-2.18 > > 2.18. Click to Dial > > > Bob's PC Bob Carol > | REFER Refer-To:Carol F1 | > |------------------->| | > | 202 Accepted F2 | | > |<-------------------| | > | | INVITE F3 | > | |------------------->| > | | 180 Ringing F4 | > | |<-------------------| > | | 200 OK F5 | > | |<-------------------| > | | ACK F6 | > | |------------------->| > | | RTP | > | |<==================>| > | | | > > In this example, while browsing the web on his PC, Bob clicks on > Carol's SIP URI, intending to establish a session with Carol. Bob's > web browser passes the SIP URI to the SIP client on Bob's PC. The PC > client is configured with the URI of Bob's SIP phone. A REFER is > sent to the SIP phone, which results in the establishment of the > session between Bob and Carol. > > Note that Bob's PC requests that no REFER dialog be established by > the use of the Refer-Sub: false header field [RFC4488]. > > This flow is preferable to the 3pcc flow because the end-to-end SIP > signaling is not interrupted by the 3pcc controller, and because > Bob's experience of the call will not be marred by the lack of > ringback tone or possible clipping. Suitable authorization of the > REFER and explicit authorization of the triggered INVITE by Bob are > necessary. > > > -- > Iñaki Baz Castillo > <i...@aliax.net> > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- M. Ranganathan _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
