RFC 4028

Session Timers in the Session Initiation Protocol (SIP), April 2005

Canonical URL:
https://www.rfc-editor.org/rfc/rfc4028.txt
File formats:
Plain TextPDF
Status:
PROPOSED STANDARD
Authors:
S. Donovan
J. Rosenberg
Stream:
IETF
Source:
sip (rai)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC4028

Discuss this RFC: Send questions or comments to sipcore@ietf.org

Other actions: View Errata  |  Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

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. [STANDARDS-TRACK]


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


Download PDF Reader