Subject: [Sip] Re: [Sip-implementors] PRACK query

From: "Apoorva Bais" <[email-masked]>
Date: Thu, 28 Sep 2006 20:04:35 +0600

Hi Udit !

First 2 paragraph seem to be correct !
Not sure about the UPDATE thing ,I believe UPDATE would change the Original
request !
So in a way UPDATE would not have the same intention as 183 and PRACK !
Correct me if i am wrong !

Regards,

asb

On 9/28/06, [email-masked] <[email-masked]> wrote:
>
> Hi,
>
> Please let me know if my understanding is correct for regular session
> offer-answer when PRACK is used:
>
> For INVITE containing SDP, and if offer answer done in the using reliable
> 183 response for early media, 200 OK response SDP will have an answer for
> the regular session, so 200 OK SDP will be answer to the offer sent in
> initial SDP.
>
> Similarly, if INVITE does not  have SDP, and if offer-answer done using
> PRACK, still 200 OK will contain the regular session offer and answer will
> be present n the ACK message.
>
> Similarly, if UPDATE is used for offer-answer before call is connected, it
> will not affect the regular session offer-answer, it will be taken care by
> initial INVITE , final 200 OK and ACK message.
>
> Thank,s
> Udit
>
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