From: varun <[EMAIL PROTECTED]>
What is the use of expires header field in an Invite
request? Will the request get timed out after this
time in case no final response is received?
It means that the invitation is only valid for the specified length of
time.
13.3.1 Processing of the INVITE
1. If the request is an INVITE that contains an Expires header
field, the UAS core sets a timer for the number of seconds
indicated in the header field value. When the timer fires, the
invitation is considered to be expired. If the invitation
expires before the UAS has generated a final response, a 487
(Request Terminated) response SHOULD be generated.
(Although IMHO opinion there should be a different 4xx response for
this sort of Ring-No-Answer condition.)
In addition, the UAC is expected to CANCEL the INVITE from its end if
the Expires time elapses without a final response.
Dale
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