Hi,
Thanks for the response. Actually I may confuse you. Specifically, if the
callee sends the media after 183, and 183 is lost, will the caller should
accept the media, because it don't know codec should the media expect or caller
should decode whatever is coming, by finding the codecs in the list it offers.
Sorry I don't know that it is the basic requirement, but in RFC can I find the
statements that tell the media starts after the SDP negotiation is completed.
My options are
INVITE-------------> OR INVITE ------------>
<--------183 (lost) <-------->183(lost)
drop<----------------media accept<-----------(media)
Thanks,
Anil
-----Original Message-----
From: Fatih "Ey|p" NAR [mailto:[EMAIL PROTECTED]
Sent: Monday, December 06, 2004 2:44 PM
To: Syed, Mohammad Rafi; Anil Bollineni; [EMAIL PROTECTED];
[EMAIL PROTECTED]
Subject: RE: [Sip] Doubts in SIP/SDP
if u insist on to send sdp within provisional response
(180/183 etc 4 early media connection purpose ex.) and
you want to verify the reverse signalling path --> u
may use prack mechanism...
--- "Syed, Mohammad Rafi" <[EMAIL PROTECTED]> wrote:
> Hi Anil,
>
> Case 1)
> In INVITE w/o option 100rel(offer) case the callee
> is supposed to send answer(SDP) in 200 OK. if 200 OK
> sent from callee is lost its the callee's
> responsibility to retrnasmitt 200 OK.(or callee
> retransmitt 200 OK until he recvs ACK from caller).
>
> thank u,
> Rafi.
>
> -----Original Message-----
> From: Anil Bollineni
> [mailto:[EMAIL PROTECTED]
> Sent: Mon 12/6/2004 4:46 PM
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Cc:
> Subject: [Sip] Doubts in SIP/SDP
>
>
>
> Dear All,
>
> I need to clear some doubts in SDP and SIP
> protocol specifics.
>
> 1. Caller sends INVITE without the option
> 100Rel, callee responds 183, and 183 message is
> lost, can caller should receive media from callee?.
> Or without 183, callee sends 200 OK, 200 OK is lost
> and sends media without, it waiting ACK for 200 OK,
> should caller should receive the media from callee?
>
> 2. Assume caller sends INVITE to x.x.x.x:5060,
> can response to INVITE can come from y.y.y.y:5060?
>
>
>
> Actually these two questions are different, if
> there is some possibility or the above requirements
> violates related RFC’s, can you please let me
> know. I would greatly respect the responses.
>
>
>
> Thanks in advance,
>
> Anil
>
>
>
>
>
>
>
> > _______________________________________________
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