Hi All,
I have a question regarding supporting the session timer.
Is Session-Expires header mandatory in INVITE request for call-establishment,if
we support session-timers?
Ex:-
A B
INVITE
------------------------------------------>
100 Trying
<-------------------------------------------
180 Ringing
<-------------------------------------------
200 OK
<-------------------------------------------
ACK
------------------------------------------->
<RTP/RTCP>
< ------------------------------------------->
re-INVITE(with Session-Expires header)
------------------------------------------->
200 OK
<-----------------------------------------
ACK
------------------------------------------>
Can i initiate Session-timer extension in re-INVITE? Is the above
scenario is valid ?
Whats the main advantage of using session-timers - is it for BILLING? or is it
to check whether remote end is active or not?
Thanks in advance
Pavan
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