RFC 3087 (rfc3087) - Page 1 of 39
Control of Service Context using SIP Request-URI
Alternative Format: Original Text Document
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