Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping
RFC 3398
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Type |
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RFC - Proposed Standard
(December 2002; Errata)
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Last updated |
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2015-10-14
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IETF
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plain text
pdf
html
bibtex
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WG state
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(None)
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Document shepherd |
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No shepherd assigned
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IESG state |
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RFC 3398 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Allison Mankin
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IESG note |
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Responsible: RFC Editor
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Send notices to |
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<rohan@cisco.com>, <dean.willis@softarmor.com>
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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 [Page 1]
RFC 3398 ISUP to SIP Mapping December 2002
5.7 Privacy Protection...................................... 9
5.8 CANCEL causes........................................... 10
6. Mapping................................................. 10
7. SIP to ISUP Mapping..................................... 11
7.1 SIP to ISUP Call flows.................................. 11
7.1.1 En-bloc Call Setup (no auto-answer)..................... 11
7.1.2 Auto-answer call setup.................................. 12
7.1.3 ISUP T7 Expires......................................... 13
7.1.4 SIP Timeout............................................. 14
7.1.5 ISUP Setup Failure...................................... 15
7.1.6 Cause Present in ACM Message............................ 16
7.1.7 Call Canceled by SIP.................................... 17
7.2 State Machine........................................... 18
7.2.1 INVITE received......................................... 19
7.2.1.1 INVITE to IAM procedures................................ 19
7.2.2 ISUP T7 expires......................................... 23
7.2.3 CANCEL or BYE received.................................. 23
7.2.4 REL received............................................ 24
7.2.4.1 ISDN Cause Code to Status Code Mapping.................. 24
7.2.5 Early ACM received...................................... 27
7.2.6 ACM received............................................ 27
7.2.7 CON or ANM Received..................................... 28
7.2.8 Timer T9 Expires........................................ 29
7.2.9 CPG Received............................................ 29
7.3 ACK received............................................ 30
8. ISUP to SIP Mapping..................................... 30
8.1 ISUP to SIP Call Flows.................................. 30
8.1.1 En-bloc call setup (non auto-answer).................... 31
8.1.2 Auto-answer call setup.................................. 32
8.1.3 SIP Timeout............................................. 33
8.1.4 ISUP T9 Expires......................................... 34
8.1.5 SIP Error Response...................................... 35
8.1.6 SIP Redirection......................................... 36
8.1.7 Call Canceled by ISUP................................... 37
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