2 Jul 2003 22:33
<Internet-Drafts <at> ietf.org>
2003-07-02 20:33:58 GMT
2003-07-02 20:33:58 GMT
A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Session Initiation Protocol Working Group of the IETF. Title : Session Timers in the Session Initiation Protocol (SIP) Author(s) : S. Donovan, J. Rosenberg Filename : draft-ietf-sip-session-timer-11.txt Pages : 21 Date : 2003-7-2 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 if 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. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-sip-session-timer-11.txt To remove yourself from the IETF Announcement list, send a message to ietf-announce-request with the word unsubscribe in the body of the message. Internet-Drafts are also available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-ietf-sip-session-timer-11.txt". A list of Internet-Drafts directories can be found in http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt Internet-Drafts can also be obtained by e-mail. Send a message to: mailserv <at> ietf.org. In the body type: "FILE /internet-drafts/draft-ietf-sip-session-timer-11.txt". NOTE: The mail server at ietf.org can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e. documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft.