RFC 3398 (rfc3398) - Page 1 of 68
Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping
Alternative Format: Original Text Document
Network Working Group G. Camarillo
Request for Comments: 3398 Ericsson
Category: Standards Track A. B. Roach
dynamicsoft
J. Peterson
NeuStar
L. Ong
Ciena
December 2002
Integrated Services Digital Network (ISDN) User Part (ISUP)
to Session Initiation Protocol (SIP) Mapping
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
This document describes a way to perform the mapping between two
signaling protocols: the Session Initiation Protocol (SIP) and the
Integrated Services Digital Network (ISDN) User Part (ISUP) of
Signaling System No. 7 (SS7). This mechanism might be implemented
when using SIP in an environment where part of the call involves
interworking with the Public Switched Telephone Network (PSTN).
Table of Contents
1. Introduction............................................ 3
2. Scope................................................... 4
3. Terminology............................................. 5
4. Scenarios............................................... 5
5. SIP Mechanisms Required................................. 7
5.1 'Transparent' Transit of ISUP Messages.................. 7
5.2 Understanding MIME Multipart Bodies..................... 7
5.3 Transmission of DTMF Information........................ 8
5.4 Reliable Transmission of Provisional Responses.......... 8
5.5 Early Media............................................. 8
5.6 Mid-Call Transactions which do not change SIP state..... 9
Camarillo, et. al. Standards Track