Hi Nagesh,
Additional offer-answer exchange can not happen in the 200 OK
and ACK. Because there can be at most one offer/answer per transaction.
http://www1.ietf.org/mail-archive/web/sip/current/msg11956.html
Regards,
Thangarajan.
"Shekar, Nagesh"
<[EMAIL PROTECTED]
.com> To
Sent by: <[EMAIL PROTECTED]>, "Suganya"
sip-implementors- <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] <[email protected]>
ia.edu cc
Subject
08/31/2005 12:13 RE: [Sip-implementors] Offer in
PM reliable provisional response
After an initial offer-answer exchange via 183-PRACK, an additional
offer-answer exchange can happen in 200 OK and ACK, if needed.
Nagesh Shekar
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Darshan
Bildikar
Sent: Wednesday, August 31, 2005 10:36 AM
To: 'Suganya'; [email protected]
Subject: RE: [Sip-implementors] Offer in reliable provisional response
Inline.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Suganya
Sent: Wednesday, August 31, 2005 10:23 AM
To: [email protected]
Subject: [Sip-implementors] Offer in reliable provisional response
Hi all,
This is a query about offer answer model and reliable provisional
response.
As per RFC 3261, when INVITE (UAC) does not send an offer, offer can be
made in the 200 Ok (UAS) and the answer can be sent in the ACK.
Is the same possible with reliable provisional responses also?
ie.,
1) when my INVITE does not contain an offer, can the UAS send
provisional responses - 180,183 with an offer in it?
<Darshan> Yes. In this case according to the RFC the answer MUST be in
the
PRACK.
2) If so, should the same offer be sent in 200 OK also?
<Darshan> No need. The 200 OK answer can be without SDP.
Thanks in advance,
B.Suganya
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