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Caller Preferences for the Session Initiation Protocol (SIP) (RFC3841)

IP.com Disclosure Number: IPCOM000030836D
Original Publication Date: 2004-Aug-01
Included in the Prior Art Database: 2004-Aug-28
Document File: 27 page(s) / 61K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Rosenberg: AUTHOR [+3]

Abstract

This document describes a set of extensions to the Session Initiation Protocol (SIP) which allow a caller to express preferences about request handling in servers. These preferences include the ability to select which Uniform Resource Identifiers (URI) a request gets routed to, and to specify certain request handling directives in proxies and redirect servers. It does so by defining three new request header fields, Accept-Contact, Reject-Contact, and Request- Disposition, which specify the caller's preferences.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 5% of the total text.

Network Working Group                                       J. Rosenberg

Request for Comments: 3841                                   dynamicsoft

Category: Standards Track                                 H. Schulzrinne

                                                     Columbia University

                                                              P. Kyzivat

                                                           Cisco Systems

                                                             August 2004

      Caller Preferences for the Session Initiation Protocol (SIP)

Status of this Memo

   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 unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

Abstract

   This document describes a set of extensions to the Session Initiation

   Protocol (SIP) which allow a caller to express preferences about

   request handling in servers.  These preferences include the ability

   to select which Uniform Resource Identifiers (URI) a request gets

   routed to, and to specify certain request handling directives in

   proxies and redirect servers.  It does so by defining three new

   request header fields, Accept-Contact, Reject-Contact, and Request-

   Disposition, which specify the caller's preferences.

Rosenberg, et al.           Standards Track                     [Page 1]

RFC 3841               Caller Preferences for SIP            August 2004

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2

   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4

   3.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  4

   4.  Overview of Operation  . . . . . . . . . . . . . . . . . . . .  4

   5.  UAC Behavior . . . . . . . . . . . . . . . . . . . . . . . . .  5

       5.1.  Request Handling Preferences . . . . . . . . . . . . . .  6

       5.2.  Feature Set Preferences  . . . . . . . . . . . . . . . .  6

   6.  UAS Behavior . . . . . . . . . . . . . . . . . . . . . . . . .  8

   7.  Proxy Behavior . . . . . . . . . . . . . . . . . . . . . . . .  9

       7.1.  Request-Disposition Processing . . . . . . . . . . . . .  9

       7.2.  Preference and Capability Matchin...