[rfc-dist] RFC 4508 on Conveying Feature Tags with the Session Initiation Protocol (SIP) REFER Method

rfc-editor@rfc-editor.org rfc-editor at rfc-editor.org
Fri May 26 15:26:14 PDT 2006

A new Request for Comments is now available in online RFC libraries.

        RFC 4508

        Title:      Conveying Feature Tags with the 
                    Session Initiation Protocol (SIP) REFER Method 
        Author:     O. Levin, A. Johnston
        Status:     Standards Track
        Date:       May 2006
        Mailbox:    oritl at microsoft.com, 
                    ajohnston at ipstation.com
        Pages:      6
        Characters: 11338
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-sip-refer-feature-param-01.txt

        URL:        http://www.rfc-editor.org/rfc/rfc4508.txt

The SIP "Caller Preferences" extension defined in RFC 3840 provides a
mechanism that allows a SIP request to convey information relating to
the originator's capabilities and preferences for handling of that
request.  The SIP REFER method defined in RFC 3515 provides a mechanism
that allows one party to induce another to initiate a SIP
request.  This document extends the REFER method to use the mechanism
of RFC 3840.  By doing so, the originator of a REFER may inform the
recipient as to the characteristics of the target that the induced
request is expected to reach.  [STANDARDS TRACK]

This document is a product of the Session Initiation Protocol
Working Group of the IETF.

This is now a Proposed Standard Protocol.

STANDARDS TRACK: 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 

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USC/Information Sciences Institute


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