SIST-TS ETSI/TS 102 142 V1.1.1:2005

• Abstract:

  To endorse and constrain where relevant the SIGTRAN (IETF) RFC on M3UA.

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.040.01 - Telecommunication systems in general
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Ref Project: ETSI TS 102 142 V1.1.1 (2003-05) - Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP and SIGTRAN (Message of SS7 over IP); Message transfer part 3 User Adaptation layer (M3UA) [Endorsement of RFC 3332 (2002), modified]

SIST-TS ETSI/TS 102 142 V1.1.1:2005 is the Slovenian version of ETSI TS 102 142 V1.1.1. It defines how MTP3 User Adaptation layer (M3UA) is used with Stream Control Transmission Protocol (SCTP) to carry Signalling System No. 7 (SS7) message transfer part 3 information over Internet Protocol (IP). It is aimed at people implementing or operating SIGTRAN-based SS7-over-IP systems who need the RFC 3332 behavior as constrained for ETSI use.

What does SIST-TS ETSI/TS 102 142 V1.1.1:2005 specify?

SIST-TS ETSI/TS 102 142 V1.1.1:2005 specifies the requirements for M3UA when it is used with SCTP for SS7 MTP3 transport over IP. It endorses RFC 3332 and constrains it where ETSI needs specific behavior.

The document is organized into:

• Scope, references, definitions and abbreviations
• General considerations for transport of SS7 over IP
• M3UA-specific considerations
• Modifications to RFC 3332
• Security considerations
• IANA considerations

Clause 6 is the main place where the ETSI-specific changes to RFC 3332 are recorded. Clause 7 gives the protocol registration and port guidance used with M3UA.

What are the key requirements of SIST-TS ETSI/TS 102 142 V1.1.1:2005?

SIST-TS ETSI/TS 102 142 V1.1.1:2005 is strict about the transport protocol, peer behavior, routing control, and SS7 network management handling. In practice, it tells implementers what they may not do, what they must signal, and how to react to SS7 events.

Transport and SCTP use

Clause 4 and clause 6 require SCTP for M3UA and prohibit TCP for M3UA. Clause 4 also says unordered user messages shall not be used. For implementers, this means the IP stack and message handling must be built around SCTP behavior, not a generic TCP model.

Configuration and routing control

Clause 4 and clause 5 say dynamic registration is not used for configuration management, and system configuration is changed only by the management system. Clause 5 also requires the Routing Key granularity to be no smaller than Point Code. This matters because routing behavior must stay under managed configuration, not protocol-side changes.

Application Server behavior

Clause 4 says the Application Server (AS) becomes active when the first Application Server Process (ASP) becomes active and remains active until the last ASP becomes inactive. Broadcast mode shall not be used. In practice, this defines how traffic availability is judged in a multi-ASP setup.

Message handling and error response

Clause 4 requires a Management Error with error code “Unsupported Message Class” when an unrecognized message class is received. Clause 6 also defines behavior for unexpected or unsupported messages and for discarded traffic. This gives clear interworking rules for error reporting and fallback behavior.

SS7 management and congestion

Clause 6 covers DAUD, DUNA, DRST, DUPU, SCON, BEAT and BEAT ACK handling. It requires audit of unavailable destinations, congestion reporting, and heartbeat acknowledgement, while forbidding DRST and M3UA BEAT use. For operations teams, this is the part that ties M3UA to SS7 route status and congestion management.

Network limits and identifiers

Clause 6 sets the maximum signalling information field size at 272 octets and states that SCTP stream mapping is implementation dependent, but sequenced messages for each other shall use the same stream. Clause 7 recommends port 2905 for server operation and requires payload protocol ID 3 for M3UA. These details matter for interoperability between vendors.

What terms does SIST-TS ETSI/TS 102 142 V1.1.1:2005 define?

• AS - Application Server: the logical server that handles a set of SS7 traffic associations.
• ASP - AS Process: a process within an AS that becomes active or inactive for traffic handling.
• SG - Signalling Gateway: the gateway that connects SS7 signaling to IP transport.
• SGP - SG Process: the process inside an SG that performs the gateway function.
• SCTP - Stream Control Transmission Protocol: the transport protocol required for M3UA in this document.
• M3UA - Message transfer part 3 User Adaptation layer: the adaptation layer that carries MTP3 information over IP.

Who uses SIST-TS ETSI/TS 102 142 V1.1.1:2005?

This document is used by telecom equipment vendors, signaling gateway designers, and software developers implementing SIGTRAN stacks. It is also relevant to network operators, integration teams, and test engineers who need interoperable SS7-over-IP behavior between ASPs and SGs. Quality and procurement teams use it to check that a product follows the ETSI-constrained M3UA behavior.

What changed in SIST-TS ETSI/TS 102 142 V1.1.1:2005 from RFC 3332?

SIST-TS ETSI/TS 102 142 V1.1.1:2005 endorses RFC 3332 and records ETSI modifications to it. The document constrains RFC 3332 by fixing the transport choice to SCTP, limiting certain M3UA and SS7 management behaviors, and adding ETSI-specific handling for routing, congestion, and message processing.

Which standards are used with SIST-TS ETSI/TS 102 142 V1.1.1:2005?

• IETF RFC 3332 - the base M3UA specification that this document endorses and modifies.
• ETSI TS 102 144 - defines the SCTP profile used by this document.
• ETSI EN 300 008-1 - provides SS7 MTP procedures and modified ITU-T references.
• ITU-T Recommendation Q.704 - supplies SS7 signaling network functions, messages, and congestion procedures.
• ETSI EG 201 693 - provides the master list of codepoints, including service indicator alignment.
• ETSI TS 102 141 - related M2UA specification in the same SPAN family.
• ETSI TS 102 143 - related SUA specification in the same SPAN family.

What does the SIST-TS ETSI/TS 102 142 V1.1.1:2005 document contain?

The document contains the scope, reference list, definitions, abbreviations, and the technical clauses that govern SS7 over IP transport with M3UA. It includes rules for transport protocol choice, application server state handling, routing key use, heartbeat behavior, and SS7 network management messages such as DUNA, DAUD, and SCON. Clause 6 is the main technical change log against RFC 3332, while clause 7 gives IANA-related port and payload guidance for interoperability and deployment.

SLOVENSKI STANDARD
01-januar-2005
6WRULWYHLQSURWRNROL]DQDSUHGQDRPUHåMD63$1±0736&&366&23LQ6,*75$1
SUHQRV66SUHNR,3±8SRUDEQLãNDSULODJRGLOQDSODVWVSRURþLOQRSUHQRVQHJD
GHOD08$>SUHY]HWL5)&VSUHPHQMHQ@
Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP and
SIGTRAN (Message of SS7 over IP); Message transfer part 3 User Adaptation layer
(M3UA) [Endorsement of RFC 3332 (2002), modified]
Ta slovenski standard je istoveten z: TS 102 142 Version 1.1.1
ICS:
33.040.01 Telekomunikacijski sistemi Telecommunication systems
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Technical Specification
Services and Protocols for Advanced Networks (SPAN);
MTP/SCCP/SSCOP and SIGTRAN (Message of SS7 over IP);
Message transfer part 3 User Adaptation layer (M3UA)
[Endorsement of RFC 3332 (2002), modified]

2 ETSI TS 102 142 V1.1.1 (2003-05)

Reference
DTS/SPAN-130263
Keywords
M3UA, MTP, SCCP, SIGTRAN, SS7,
endorsement
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, send your comment to:
[e-mail]
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2003.
All rights reserved.
TM TM TM
DECT , PLUGTESTS and UMTS are Trade Marks of ETSI registered for the benefit of its Members.
TM
TIPHON and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI TS 102 142 V1.1.1 (2003-05)
Contents
Intellectual Property Rights.4
Foreword.4
Endorsement notice .4
Introduction .4
1 Scope.5
2 References.5
3 Definitions and abbreviations.5
3.1 Definitions.5
3.2 Abbreviations.6
4 General considerations applicable to transport of Signalling System No. 7 over IP.6
4.1 Transport protocol.6
4.2 SCTP considerations.6
4.3 National options.6
4.4 Application Server mode.6
4.5 Application Server state handling.6
4.6 Dynamic registration.7
4.7 Message distribution to the Application Server.7
4.8 Receipt of unrecognized messages.7
5 Considerations applicable to M3UA .7
5.1 National options.7
5.2 Dynamic registration.7
5.3 Message distribution to the Application Server.7
5.4 M3UA procedures.7
6 Modifications to RFC 3332.7
History .11

ETSI
4 ETSI TS 102 142 V1.1.1 (2003-05)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
All published ETSI deliverables shall include information which directs the reader to the above source of information.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Services and Protocols for
Advanced Networks (SPAN).
Endorsement notice
The Elements of the Internet Engineering Task Force Request for Comments RFC 3332 [1] apply, with the following
modifications.
Introduction
The present document records the changes to the Internet Engineering Task Force (IETF) RFC 3332 [1]. This RFC
specifies an Internet standard track protocol for the transport of Signalling Systems No.7 (SS7) information over IP
using the Stream Control Transmission Protocol.
ETSI
5 ETSI TS 102 142 V1.1.1 (2003-05)
1 Scope
The present document specifies the requirements for the MTP3 User Adaptation layer (M3UA), when used in
conjunction with the Stream Control Transmission Protocol (SCTP) for the transport of the Signalling System No.7
Message Transport Part 3 (MTP3) information over the Internet Protocol (IP). The document endorses and constrains
where relevant the SIGTRAN (IETF) RFC 3332 [1] of M3UA.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] IETF RFC 3332 (2002): "Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User
Adaptation Layer (M3UA)", G. Sidebottom, K. Morneault, J. Pastor-Balbas.
[2] ETSI TS 102 144: "Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP
and SIGTRAN; SCTP [Endorsement of RFC 2960 and RFC 3309 , modified]".
[3] ETSI EN 300 008-1: "Integrated Services Digital Network (ISDN); Signalling System No.7;
Message Transfer Part (MTP) to support international interconnection; Part 1: Protocol
specification [ITU-T Recommendations Q.701, Q.702, Q.703, Q.704, Q.705, Q.706, Q.707 and
Q.708 modified]".
[4] ITU-T Recommendation Q.704: "Specifications of Signalling System No. 7, Message Transfer
Part, Signalling network functions and messages".
[5] ETSI EG 201 693: "Integrated Services Digital Network (ISDN); Signalling System No.7; Master
list of codepoints".
[6] ETSI TS 102 141: "Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP
and SIGTRAN (Transport of SS7 over IP); Message transfer part 2 User Adaptation layer (M2UA)
[Endorsement of RFC 3331 (2002), modified]".
[7] ETSI TS 102 143: "Services and Protocols for Advanced Networks (SPAN); MTP/SCCP/SSCOP
and SIGTRAN (Transport of SS7 over IP); Signalling connection control part User Adaptation
layer (SUA) [Endorsement of SIGTRAN-SUA-14 (December 2002), modified]".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
example 1: text used to clarify abstract rules by applying them literally
ETSI
6 ETSI TS 102 142 V1.1.1 (2003-05)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AS Application Server
ASP AS Process
BEAT heartBEAT
BEAT Ack heartBEAT Acknowledgement
DAUD Destination state AUDit
DRST Destination ReSTricted
DUNA Destination UNAvailable
DUPU Destination User Part Unavailable
IANA Internet Assigned Numbers Authority
IETF Internet Engineering Task Force
IP Internet Protocol
RFC Request For Comment
SCTP Stream Control Transmission Protocol
SG Signalling Gateway
SGP SG Process
SS7 Signalling System Number 7
TCP Transmission Control Protocol
4 General considerations applicable to transport of
Signalling System No. 7 over IP
The elements of SIGTRAN adaptation la
...