hi Neel, I have seen some implementation that does not send contact header in re-INVITE or INVITE for call hold. Mainly this happens if implementation is according to RFC 2543. So it is better if implementation handles without contact header for INVITEs within dialog.
Regards, Mahipati Deshpande --- Bala Neelakantan <[EMAIL PROTECTED]> wrote: > Deepak, > > Even though it is called Re-INVITE is also uses the same method INVITE. So > the rules for INVITE should be applied for Re-INVITEs. So, I would expect > to see contact header in Re-INVITE and the 200 OK response too. The contact > could still be the same. In this case, it is equivalent to no-op. > > Thanks, > Neel > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Wednesday, August 30, 2006 10:14 AM > To: sip-implementors@cs.columbia.edu > Cc: [EMAIL PROTECTED] > Subject: [Sip-implementors] Contact header in re-INVITE message > > rfc 3261 states the following > > Section 12.2 Page 75 > " Requests within a dialog MAY contain Record-Route and Contact header > fields. However, these requests do not cause the dialog's route set > to be modified, although they may modify the remote target URI." > > Page 75 > " A UAC SHOULD include a Contact header field in any target refresh > requests within a dialog, and unless there is a need to change it," > > > Does this mean that Contact header is not mandatory/required in a > re-INVITE message > or a 2xx response to a re-INVITE message. > > Table 3, Section 20, page 162 shows that the Contact is mandatory in INV > and 2xx messages. > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > Mahipati Deshpande __________________________________________________________ Yahoo! India Answers: Share what you know. Learn something new http://in.answers.yahoo.com/ _______________________________________________ Sip-implementors mailing list Sip-implementors@cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
