[Sip-implementors] question reletade to 491 respnse processing
neranza at batmbg.com
Fri Sep 16 11:11:37 EDT 2005
I have a question according to 491 processing. Let say that A and B user
agents are in call. There is a dialog between A and B. A holds B. B
tries to hold A and in the same time A tries to unhold B. A and B
receives Invite request form the other side of the dialog in the moment
when they have already sent the INVITE requests. A and B sends 491
response to the INVITE requests that they have received. A and B starts
retransmit timers. Retry timer of A UA fires.
What will be the correct behavior for B.
B to send a 4xx or 5xx response to the INVITE and after the retry timer
of B fires it to resend its INVITE request.
B to process INVITE request (unhold the media) and not to resend the
INVITE after retry timer fires.
B to process the INVITE request (unhold the media), after retry timer
firing to hold the media and resend its INVITE request.
Thanks in advance
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