Hi Prakash
The Server sends a 420 when it doesn't support "timer"
option-tag. so its working fine when you remove it from your
request.
As per section 7.1 of RFC 4028, the UAC SHALL include a
Require header with option-tag as "time" in the initial INVITE when it wants the
server to support session timer - but this does not necessarily mean that UAC
wants the server to perform refresh - but only wants the server to support the
session timer.
but if
the UAC includes a Proxy-Require header with value as "timer", in the initial
INVITE then the server MUST support "session-timer" in order to process the
request.
But
again as per RFC Require and Proxy-Require headers are not recommended to be
used - but a UAC needs to include "Session-Expires" header field to indicate to
the server to apply Session Timer.
Regards
Ranjit
Regards
Ranjit
From: sipping-bounces@xxxxxxxx [mailto:sipping-bounces@xxxxxxxx] On Behalf Of Prakash Ganesan
Sent: Friday, March 13, 2009 5:08 PM
To: sip@xxxxxxxx; sipping@xxxxxxxx
Subject: Pls clarify on session timer
Hi All,
I am facing a problem with the session
timer.
The refesh re-invite contains header field
Require: timer and my server is rejecting the request with 420 bad extension.
When I remove the header field Reqire: timer, it is working fine.
I am bit confused with the section 7.1
Generating an Initial Session Refresh Request, in RFC 4028 it
is referring to the first SIP invite or the first session refresher
(re-Invite)
--
Cheers
Prakash
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