RFC 3204 (rfc3204) - Page 1 of 10

MIME media types for ISUP and QSIG Objects

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Network Working Group                                        E. Zimmerer
Request for Comments: 3204                                  Rankom, Inc.
Category: Standards Track                                    J. Peterson
                                                           Neustar, Inc.
                                                               A. Vemuri
                                                    Qwest Communications
                                                                  L. Ong
                                                          Ciena Networks
                                                                F. Audet
                                                               M. Watson
                                                               M. Zonoun
                                                         Nortel Networks
                                                           December 2001


               MIME media types for ISUP and QSIG Objects

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 (2001).  All Rights Reserved.

Abstract

   This document describes MIME types for application/ISUP and
   application/QSIG objects for use in SIP applications, according to
   the rules defined in RFC 2048.  These types can be used to identify
   ISUP and QSIG objects within a SIP message such as INVITE or INFO, as
   might be implemented when using SIP in an environment where part of
   the call involves interworking to the PSTN.

1. Introduction

   ISUP (ISDN User part) defined in the ITU-T recommendations Q.761-4 is
   a signaling protocol used between telephony switches.  There are
   configurations in which ISUP-encoded signaling information needs to
   be transported between SIP entities as part of the payload of SIP
   messages, where the preservation of ISUP data is necessary for the
   proper operation of PSTN features.





Zimmerer, et al.            Standards Track
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