RFC 3841 (rfc3841) - Page 1 of 26

Caller Preferences for the Session Initiation Protocol (SIP)

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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
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