RFC 3087 (rfc3087) - Page 1 of 39

Control of Service Context using SIP Request-URI

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Network Working Group                                        B. Campbell
Request for Comments: 3087                                     R. Sparks
Category: Informational                                      dynamicsoft
                                                              April 2001


            Control of Service Context using SIP Request-URI

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2001).  All Rights Reserved.

Abstract

   This memo provides information for the Internet community.  It
   describes a useful way to conceptualize the use of the standard SIP
   (Session Initiation Protocol) Request-URI (Uniform Resource
   Identifier) that the authors and many members of the SIP community
   think is suitable as a convention.  It does not define any new
   protocol with respect to RFC 2543.

   In a conventional telephony environment, extended service
   applications often use call state information, such as calling party,
   called party, reason for forward, etc, to infer application context.
   In a SIP/2.0 call, much of this information may be either non-
   existent or unreliable.  This document proposes a mechanism to
   communicate context information to an application.  Under this
   proposal, a client or proxy can communicate context through the use
   of a distinctive Request-URI.  This document continues with examples
   of how this mechanism could be used in a voice mail application.















Campbell & Sparks            Informational
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