[SIPForum-discussion] Offer/Answer question

[gaurav katiyar]

After receving 200OK, UAC should generate ACk immediatly. and on UAS side, it should wait for ACK and than can generate UPDATE/INVITE as per their capability.
   
  cheers
  Gaurav
   
  > -----Original Message-----
> From: kaiduan xie [mailto:kaiduanx at yahoo.ca]
> Sent: Friday, April 11, 2008 10:32 PM
> To: Bob Penfield; Manpreet Singh; discussion at sipforum.org; 
> sip-implementors at lists.cs.columbia.edu
> Subject: Re: [Sip-implementors] Offer/Answer question
> 
> Is the following case legal?
> 
> UAC                              UAS
> INVITE/SDP  ------------------->
> <-------------------------------- 200/SDP, UPDATE/SDP 
> ---------------->
> <------------ 200 for UPDATE/SDP
> ACK(no SDP) ------------------>
> 
> There is no PRACK in the call flow.
> 
> Thanks,
> 
> kaiduan
> ----- Original Message ----
> From: Bob Penfield <BPenfield at acmepacket.com>
> To: Manpreet Singh <msingh at ibasis.net>; "discussion at sipforum.org"
> <discussion at sipforum.org>; "sip-implementors at lists.cs.columbia.edu"
> <sip-implementors at lists.cs.columbia.edu>
> Sent: Friday, April 11, 2008 5:54:36 PM
> Subject: Re: [Sip-implementors] Offer/Answer question
> 
> Yes. The 200 OK (or the 180 if using 100rel) MUST have the answer.
> 
> cheers,
> (-:bob
> 
> -----Original Message-----
> From: sip-implementors-bounces at lists.cs.columbia.edu
> [mailto:sip-implementors-bounces at lists.cs.columbia.edu] On Behalf Of 
> Manpreet Singh
> Sent: Friday, April 11, 2008 1:47 PM
> To: discussion at sipforum.org; sip-implementors at lists.cs.columbia.edu
> Subject: [Sip-implementors] Offer/Answer question
> 
> For an INVITE carrying an offer, does the offer/answer has to complete

> within the INVITE transaction? Can it complete outside the transaction

> but within the same dialog? Call flow is:
> 
> -------------->Invite ( offer )
> <------------180 ( ringing )
> <------------200OK ( empty..no offer )
> ------------->ACK
> <------------Re-Invite ( Answer to offer in first invite )
> -------------->200OK
> <--------------ACK
> 
> M
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Gaurav Katiyar
  Induslogic india pvt. ltd
  B-34/1 sector 59 NOIDA
  Phone:9818381368
   

        
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