[Kamailio-Users] Reg. SIP conferencing support for RFC 4579

LetMeKnow sunkara.raviprakash.feb14 at gmail.com
Wed Feb 4 16:45:12 CET 2009


Hi,
For this Asterisk or SEMS won't work ,

So, it can  Work on sip Application Server, with Cantata Media Service or
Dialog Media Server


Thanks &Regards
Ravi Prakash Sunkara
VoIP Architect & JAVA-SIP Developer
+91-9999882776


2009/2/4 Iñaki Baz Castillo <ibc at aliax.net>

> 2009/2/4 Padmaja R <urvthme at gmail.com>:
> > Say A and B are in a SIP call, and A and B suddenly decide to have a
> > conference with C. A puts B on hold and dials C' s number. After call
> > between A and C is up, if A presses hook flash, this sends an invite to
> the
> > conference application namely: conf at openseratlocalhost:5060 (which is
> the ip
> > and port  number at which my openser proxy would be listening). The
> server
> > should then send back 200 Ok with the contact header containing the
> isfocus"
> > parameter of the form -Contact: <sip:conference1 at mediaproxyip;isfocus>
> The
> > isfocus is an RFC 4579 based feature. The 200 Ok responses to other
> invites
> > (normal calls that do not create conference) should not include this
> isfocus
> > in the contact header of 200 Ok.
> >
> > Finally, the openser proxy should be able to contact the media proxy on
> > receiving an invite to create the conference and send that ip and focus
> > information in the 200 Ok. The UA -A would then send a REFER to B and C
> to
> > refer to the media server and they disconnect with A. Then all three UAs
> > would individually send invite to the uri returned in the contact header
> and
> > join the conference.
>
> That is not a proxy task, but a SIP application server (probably a
> B2BUA) even if it just handles signalling.
>
>
> --
> Iñaki Baz Castillo
> <ibc at aliax.net>
>
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