[SIPForum-discussion] [Sip-implementors] Offer in a 200OK for Invite transaction.

[Manpreet Singh]

Thanks...so what I said was correct...thanks for the confirmation.

Manpreet 

-----Original Message-----
From: Bob Penfield [mailto:BPenfield at acmepacket.com] 
Sent: Wednesday, July 19, 2006 4:45 PM
To: Manpreet Singh; discussion at sipforum.org
Cc: sip-implementors at cs.columbia.edu
Subject: Re: [Sip-implementors] Offer in a 200OK for Invite transaction.

No, a second offer cannot be sent in the 200OK. Only one offer/answer
exchange is permitted per transaction. The UAS should send the 200-OK either
w/o SDP or the same SDP as the 18x. Then is can send an UPDATE or a reINVITE
to propose a new offer.

cheers,
(-:bob

Robert F. Penfield
Chief Software Architect
Acme Packet, Inc.
71 Third Avenue
Burlington, MA 01803
bpenfield at acmepacket.com

----- Original Message -----
From: "Manpreet Singh" <msingh at ibasis.net>
To: <discussion at sipforum.org>
Cc: <sip-implementors at cs.columbia.edu>
Sent: Wednesday, July 19, 2006 4:18 PM
Subject: [Sip-implementors] Offer in a 200OK for Invite transaction.


> For the INVITE transaction where the offer was sent in an INVITE and the
> answer coming back in 183, would it be valid to send a new offer in the
> 200OK? So the question is whether the 200OK can be used to send a "new"
> Offer ( different from the answer in 183 ) for the INVITE transaction once
> 183 has completed the offer/answer part of that transaction. Only UPDATE 
> can
> be used for early dialog changes as per my understanding and a 200OK still
> constitutes early dialog so it wont be valid to send a new offer in 200OK?
> Although 200OK can carry the same SDP as 183 which would mean nothing or
> would not be considered as early dialog change in capability.
>
> Please correct me if I am wrong.
>
> Thanks
>
> Manpreet
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