RFC 4916 on Connected Identity in the Session Initiation Protocol (SIP)

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

        RFC 4916

        Title:      Connected Identity in the Session 

                    Initiation Protocol (SIP) 

        Author:     J. Elwell

        Status:     Standards Track

        Date:       June 2007

        Mailbox:    john.elwell@siemens.com

        Pages:      24

        Characters: 42924

        Updates:    RFC3261

        See-Also:   

        I-D Tag:    draft-ietf-sip-connected-identity-05.txt

        URL:        http://www.rfc-editor.org/rfc/rfc4916.txt

This document provides a means for a Session Initiation Protocol

(SIP) User Agent (UA) that receives a dialog-forming request to

supply its identity to the peer UA by means of a request in the

reverse direction, and for that identity to be signed by an

Authentication Service.  Because of retargeting of a dialog-forming

request (changing the value of the Request-URI), the UA that receives

it (the User Agent Server, UAS) can have a different identity from

that in the To header field.  The same mechanism can be used to

indicate a change of identity during a dialog, e.g., because of some

action in the Public Switched Telephone Network (PSTN) behind a

gateway.  This document normatively updates RFC 3261 (SIP).  

[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

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