SIST EN 300 052-1 V1.2.4:2005

• Abstract:

  Update references from ETS 300 102-1 and associated I-ETSs to ETS 300 403.

• Status: Published
• Publication Date: 31-Mar-2005
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2005
• Due Date: 01-Apr-2005
• Completion Date: 01-Apr-2005
• Ref Project: ETSI EN 300 052-1 V1.2.4 (1998-06) - Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification

SIST EN 300 052-1 V1.2.4:2005 is the Slovenian adoption of EN 300 052-1 Version 1.2.4, published by SIST. It specifies the Digital Subscriber Signalling System No. one (DSS1) protocol for the Integrated Services Digital Network (ISDN) Multiple Subscriber Number (MSN) supplementary service, for equipment and network implementations at the T reference point or coincident S and T reference point.

The document is for people who need to implement, configure, test, or assess MSN behavior on public ISDN access, including support for private ISDN interworking at the T reference point. In practice, it tells you how MSN digits are carried, how terminal selection works, and how the service fits into basic call control.

What does SIST EN 300 052-1 V1.2.4:2005 specify?

SIST EN 300 052-1 V1.2.4:2005 specifies the stage 3 protocol aspects of the MSN supplementary service for ISDN. It covers the signaling procedures and switching functions needed to support MSN over DSS1, and it also gives the coding rules for the relevant number information elements.

The document is organized into clauses 1 to 14 and four informative annexes. The main body covers scope, normative references, definitions, abbreviations, service description, operational requirements, coding requirements, state definitions, signaling procedures, interworking, interactions, timer values, and SDL diagrams.

Annex	What it covers
Annex A	Signalling flows
Annex B	Terminal interchangeability between public and private ISDNs
Annex C	Changes with respect to the previous ETS 300 052-1
Annex D	Bibliography

What are the key requirements of SIST EN 300 052-1 V1.2.4:2005?

SIST EN 300 052-1 V1.2.4:2005 ties MSN behavior closely to basic call control. That matters because implementers must follow the same call setup rules already used by EN 300 403-1, with MSN added through number coding and delivery rules.

Service provision and access use

Clause 6 says the MSN supplementary service is provided by prior arrangement with the service provider and withdrawn on request or for administrative reasons. The provider allocates a suitable set of ISDN numbers for the access, so numbering policy has to match the terminal arrangement at that access.

Originating side behavior

Clause 6.2 says the originating network side follows the basic call control procedures of EN 300 403-1 and may use Calling party number information to identify the calling terminal. In practice, this means the network can use MSN digits to support terminal identification and related services.

Called-user delivery

Clause 6.3 and clause 9.2 require the network to send at least the significant part of the called party’s ISDN number in the SETUP message. The receiving terminal uses the least significant digits for terminal selection, so equipment must be able to compare only the digits it needs and ignore surplus leading digits when necessary.

Number coding

Clause 7 defines how MSN is carried in the Called party number and Calling party number information elements. This is important for interoperability because implementations must code the number type and numbering plan in a way that other DSS1 equipment can interpret.

Exceptional cases

Clause 9.2.2 and clause 9.3.2 describe what happens when digits are missing or insufficient. A terminal or network then falls back to normal basic call control behavior, which prevents the call from failing for purely MSN-related reasons.

Private ISDN interworking and interactions

Clause 10 gives special handling when a private ISDN is known to be attached, and clause 12 delegates supplementary-service interactions to EN 300 195-1. Clause 11 says no special interaction rules are needed for other networks, which helps keep deployment simpler.

Timers and SDL support

Clause 13 points to the basic call control timers in EN 300 403-1, and clause 14 points to EN 300 403-2 for SDL diagrams. These references matter because implementers and test teams use them to align timing and state handling with the underlying call-control model.

What terms does SIST EN 300 052-1 V1.2.4:2005 define?

SIST EN 300 052-1 V1.2.4:2005 defines the core ISDN and MSN terms used in the protocol rules.

• Integrated Services Digital Network (ISDN) - The digital network framework for the service.
• Digital Subscriber Signalling System No. one (DSS1) - The signaling protocol used on the user-network interface.
• Multiple Subscriber Number (MSN) - A set of ISDN numbers assigned to one access so individual terminals can be selected.
• Network - The DSS1 protocol entity on the network side of the user-network interface.
• User - The DSS1 protocol entity on the user side of the user-network interface.
• ISDN number - A number that follows the ISDN numbering plan and structure.
• Direct Dialling In (DDI) - A numbering concept mentioned in the interworking note for private ISDNs.

Who uses SIST EN 300 052-1 V1.2.4:2005?

SIST EN 300 052-1 V1.2.4:2005 is used by public telecommunications operators, ISDN network engineers, terminal manufacturers, and test laboratories. It is also relevant to private ISDN integrators and service providers who need MSN behavior to work across public and private access points.

In practice, users apply it when they configure number assignment, implement terminal selection, verify SETUP message coding, and check interworking with basic call control and supplementary services.

What changed in SIST EN 300 052-1 V1.2.4:2005 from the previous edition?

SIST EN 300 052-1 V1.2.4:2005 replaces the previous ETS 300 052-1. Annex C states three changes: conversion to EN layout, replacement of references to ETS 300 102 with EN 300 403, and replacement of non-specific basic-standard references with later-version references.

Which standards are used with SIST EN 300 052-1 V1.2.4:2005?

The standard uses several companion documents:

• EN 300 403-1 - Basic call control procedures and the coding rules for the number information elements.
• EN 300 403-2 - SDL diagrams for the basic call control model.
• EN 300 195-1 - Interactions with other supplementary services.
• EN 300 092-1 - The special arrangement definition used in the terms section.
• CCITT Recommendation I.411 - Reference configurations at the ISDN user-network interface.
• CCITT Recommendation I.130 - The three-stage method used to describe the service.
• CCITT Recommendation I.112 - Core ISDN vocabulary.
• CCITT Recommendation E.164 - ISDN numbering structure.
• CCITT Recommendation I.210 - Definition of supplementary services.
• ETS 300 189 and ETS 300 192 - Private ISDN references used in the bibliography and interworking note.

What does the SIST EN 300 052-1 V1.2.4:2005 document contain?

SIST EN 300 052-1 V1.2.4:2005 contains the protocol rules, coding rules, and state-oriented behavior needed to support MSN on DSS1. It describes how called and calling party numbers are delivered, how terminals interpret the digits for selection, and how the service behaves when the number information is incomplete or used across a private ISDN boundary.

It also points readers to the supporting material they need for implementation and testing: signaling flows in Annex A, public/private compatibility notes in Annex B, change information in Annex C, and related references in Annex D.

SLOVENSKI STANDARD
01-april-2005
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Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN)
supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification
Ta slovenski standard je istoveten z: EN 300 052-1 Version 1.2.4
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 300 052-1 V1.2.4 (1998-06)
European Standard (Telecommunications series)
Integrated Services Digital Network (ISDN);
Multiple Subscriber Number (MSN) supplementary service;
Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification

2 EN 300 052-1 V1.2.4 (1998-06)
Reference
REN/SPS-05145-B-1 (0hc90iqo.PDF)
Keywords
ISDN, DSS1, MSN, supplementary service
ETSI
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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 1998.
All rights reserved.
ETSI
3 EN 300 052-1 V1.2.4 (1998-06)
Contents
Intellectual Property Rights.4
Foreword .4
1 Scope.6
2 Normative references .6
3 Definitions.7
4 Abbreviations.8
5 Description.8
6 Operational requirements.8
6.1 Provision and withdrawal. 8
6.2 Requirements on the originating network side. 8
6.3 Requirements on the destination network side. 8
7 Coding requirements .8
8 State definitions .8
9 Signalling procedures at the coincident S and T reference point .9
9.1 Activation, deactivation and registration . 9
9.2 Delivery of multiple subscriber number. 9
9.2.1 Normal operation . 9
9.2.2 Exceptional procedures . 9
9.3 Receipt of multiple subscriber number . 9
9.3.1 Normal operation . 9
9.3.2 Exceptional procedures . 10
10 Procedures for interworking with private ISDNs .10
11 Interactions with other networks.10
12 Interactions with other supplementary services.10
13 Parameter values (timers).10
14 Dynamic description (SDL diagrams) .10
Annex A (informative): Signalling flows.11
Annex B (informative): Terminal interchangeability between public and private ISDNs .12
Annex C (informative): Changes with respect to the previous ETS 300 052-1 .13
Annex D (informative): Bibliography.14
History.15
ETSI
4 EN 300 052-1 V1.2.4 (1998-06)
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 SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect
of ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)
which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Signalling
Protocols and Switching (SPS).
The present document is part 1 of a multi-part standard covering the Digital Subscriber Signalling System No. one
(DSS1) protocol specification for the Integrated Services Digital Network (ISDN) Multiple Subscriber Number (MSN)
supplementary service, as described below:
Part 1: "Protocol specification";
Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification";
Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user";
Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification for the user";
Part 5: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network";
Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification for the network".
In accordance with CCITT Recommendation I.130, the following three level structure is used to describe the
supplementary telecommunications services as provided by European public telecommunications operators under the
pan-European Integrated Services Digital Network (ISDN):
- Stage 1: is an overall service description, from the user's standpoint;
- Stage 2: identifies the functional capabilities and information flows needed to support the service described in
stage 1; and
- Stage 3: defines the signalling system protocols and switching functions needed to implement the service
described in stage 1.
The present document details the stage 3 aspects (signalling system protocols and switching functions) needed to
support the Multiple Subscriber Number (MSN) supplementary service. The stage 1 and stage 2 aspects are detailed in
ETS 300 050 and ETS 300 051, respectively.
The present version updates the references to the basic call specifications.
ETSI
5 EN 300 052-1 V1.2.4 (1998-06)
National transposition dates
Date of adoption of this EN: 19 June 1998
Date of latest announcement of this EN (doa): 30 September 1998
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 1999
Date of withdrawal of any conflicting National Standard (dow): 31 March 1999
ETSI
6 EN 300 052-1 V1.2.4 (1998-06)
1 Scope
This first part of EN 300 052 specifies the stage three of the Multiple Subscriber Number (MSN) supplementary service
for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications
operators at the T reference point or coincident S and T reference point (as defined in CCITT Recommendation
I.411 [1]) by means of the Digital Subscriber Signalling System No. one (DSS1). Stage three identifies the protocol
procedures and switching functions needed to support a telecommunications service (see CCITT Recommendation
I.130 [2]).
In addition, the present document specifies the protocol requirements at the T reference point where the service is
provided to the user via a private ISDN.
The present document does not specify the additional protocol requirements where the service is provided to the user via
a telecommunications network that is not an ISDN.
The MSN supplementary service provides the possibility for assigning multiple numbers to a single public or private
access.
NOTE: This allows e.g.:
1) a calling user to select, via the public network, one or multiple distinct terminals out of a multiple
choice;
2) to identify the terminal to the network for the application of other supplementary services.
It is considered:
- that in the case of a basic access some service providers may not have knowledge or control over what is
connected, e.g. a private ISDN or a terminal configuration;
- that service providers have differing numbering methods.
The MSN supplementary service is applicable to all telecommunication services.
Further parts of the present document specify the method of testing required to identify conformance to the present
document.
The present document is applicable to equipment, supporting the MSN supplementary service, to be attached at either
side of a T reference point or coincident S and T reference point when used as an access to the public ISDN.
2 Normative references
References may be made to:
a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in
which case, subsequent revisions to the referenced document do not apply; or
b) all versions up to and including the identified version (identified by "up to and including" before the version
identity); or
c) all versions subsequent to and including the identified version (identified by "onwards" following the version
identity); or
d) publications without mention of a specific version, in which case the latest version applies.
A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] CCITT Recommendation I.411 (1988): "ISDN user-network interfaces - Reference
configurations".
ETSI
7 EN 300 052-1 V1.2.4 (1998-06)
[2] CCITT Recommendation I.130 (1988): "Method for the characterisation of telecommunication
services supported by an ISDN and network capabilities of an ISDN".
[3] EN 300 403-1: "Int
...