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The Reason Header Field for the Session Initiation Protocol (SIP) (RFC3326)

IP.com Disclosure Number: IPCOM000010473D
Original Publication Date: 2002-Dec-01
Included in the Prior Art Database: 2002-Dec-06
Document File: 9 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

H. Schulzrinne: AUTHOR [+3]

Abstract

For creating services, it is often useful to know why a Session Initiation Protocol (SIP) request was issued. This document defines a header field, Reason, that provides this information. The Reason header field is also intended to be used to encapsulate a final status code in a provisional response. This functionality is needed to resolve the "Heterogeneous Error Response Forking Problem", or HERFP.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 17% of the total text.

Network Working Group                                     H. Schulzrinne

Request for Comments: 3326                           Columbia University

Category: Standards Track                                        D. Oran

                                                                   Cisco

                                                            G. Camarillo

                                                                Ericsson

                                                           December 2002

   The Reason Header Field 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 (2002).  All Rights Reserved.

Abstract

   For creating services, it is often useful to know why a Session

   Initiation Protocol (SIP) request was issued.  This document defines

   a header field, Reason, that provides this information.  The Reason

   header field is also intended to be used to encapsulate a final

   status code in a provisional response.  This functionality is needed

   to resolve the "Heterogeneous Error Response Forking Problem", or

   HERFP.

Schulzrinne, et. al.        Standards Track                     [Page 1]

RFC 3326            The Reason Header Field for SIP        December 2002

Table of Contents

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

   1.1. Terminology ................................................  3

   2.   The Reason Request Header Field ............................  3

   3.   Examples ...................................................  4

   3.1. Call Completed Elsewhere ...................................  4

   3.2. Refusing an Offer that Comes in a Response .................  4

   3.3. Third Party Call Control ...................................  5

   3.4. ISUP interworking ..........................................  5

   4.   IANA Considerations ........................................  6

   5.   Security Considerations ....................................  6

   6.   Acknowledgments ............................................  7

   7.   Authors' Addresses .........................................  7

   8.   Normative References .......................................  7

   9...