Subject: RE: draft-ietf-mmusic-sip-session-timer-00.txt

From: "Donovan, Steven R. (MCI)" <[email-masked]>
Date: Thu, 11 Feb 1999 09:59:22 -0700

This time with the draft attached.  Sorry for the extra mail.

Steve

 <<draft-ietf-mmusic-sip-session-timer-00.txt>> 

> -----Original Message-----
> From:	Donovan, Steven R. (MCI) 
> Sent:	Thursday, February 11, 1999 10:17 AM
> To:	[email-masked]'; [email-masked]'
> Subject:	draft-ietf-mmusic-sip-session-timer-00.txt
> 
> This message is notification of the following Internet Draft which has
> been submitted to the IETF for posting.
> 
> <draft-ietf-mmusic-sip-session-timer-00.txt> 
> 
> Abstract: 
> 
> This document proposes an extension to the SIP specification.  This
> extension adds a new message header that is used to specify the 
> duration of a requested session.
> 
> The session timer can be used to limit the total duration of a session
> if, for instance, one of the participants in the session wants to
> limit the cost of the session.  It can also be used by stateful SIP
> Proxy Servers to track the status of sessions for which session state
> exists on the servers. Currently a stateful SIP Proxy Server that is 
> not handling the media stream(s) for the session has no mechanism to 
> definitively determine the state of all sessions for which it has state.
> While the SIP Specification does provide the BYE method for terminating
> the session, there is no mechanism for a SIP Proxy Server to detect the
> end of a session when the BYE message is not sent or is lost due to 
> network problems.
> 
> The internet draft is attached.
> 
> Steve Donovan
> MCIWorldcom