I believe the recommended use of UPDATE for offer/answer is in early dialog state but after 200OK, its in confirmed dialog state. But if that limitation werent there, then it might just be valid to do it too. May be other folks can confirm?
M -----Original Message----- From: kaiduan xie [mailto:[EMAIL PROTECTED] Sent: Friday, April 11, 2008 10:32 PM To: Bob Penfield; Manpreet Singh; [EMAIL PROTECTED]; sip-implementors@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 <[EMAIL PROTECTED]> To: Manpreet Singh <[EMAIL PROTECTED]>; "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>; "sip-implementors@lists.cs.columbia.edu" <sip-implementors@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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Manpreet Singh Sent: Friday, April 11, 2008 1:47 PM To: [EMAIL PROTECTED]; sip-implementors@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 _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors __________________________________________________________________ Ask a question on any topic and get answers from real people. Go to Yahoo! Answers and share what you know at http://ca.answers.yahoo.com _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
