A new Request for Comments is now available in online RFC libraries.
RFC 4028
Title: Session Timers in the Session Initiation Protocol
(SIP)
Author(s): S. Donovan, J. Rosenberg
Status: Standards Track
Date: April 2005
Mailbox: srd@cisco.com, jdrosen@cisco.com
Pages: 27
Characters: 65363
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-sip-session-timer-15.txt
URL: ftp://ftp.rfc-editor.org/in-notes/rfc4028.txt
This document defines an extension to the Session Initiation Protocol
(SIP). This extension allows for a periodic refresh of SIP sessions
through a re-INVITE or UPDATE request. The refresh allows both user
agents and proxies to determine whether the SIP session is still
active. The extension defines two new header fields: Session-Expires,
which conveys the lifetime of the session, and Min-SE, which conveys
the minimum allowed value for the session timer.
This document is a product of the Session Initiation Protocol Working
Group of the IETF.
This is now a Proposed Standard Protocol.
This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
standardization state and status of this protocol. Distribution
of this memo is unlimited.
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