SIST ETS 300 050 E1:2003

• Abstract:

  T/NA1(89)20

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 050 ed.1 (1991-10) - Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN) supplementary service; Service Description

Overview

SIST ETS 300 050 E1:2003 defines the stage one service description for the Multiple Subscriber Number (MSN) supplementary service within the Integrated Services Digital Network (ISDN) in Europe. Produced by the Slovenski inštitut za standardizacijo (SIST) and based on ETSI work, this standard focuses on providing users with the ability to assign multiple numbers to a single ISDN access point, whether public or private. The MSN supplementary service enhances the flexibility and efficiency of ISDN networks, enabling users and operators to better manage devices and telecommunication services connected to the same network interface.

This service is applicable to both basic access and primary rate access configurations, supporting various telecommunication services and a broad range of user scenarios. The standard primarily describes the overall service from a user's point of view, as specified in CCITT Recommendation I.130, and does not address signaling protocols or detailed technical implementations (covered in related standards).

Key Topics

• Multiple Subscriber Number (MSN): Allows assignment of multiple, not necessarily consecutive, ISDN numbers to a single network access.
• Service Flexibility: Facilitates the selection of distinct terminals within a single ISDN access and enables identification of devices for applying other supplementary ISDN services.
• User-Centric Design: Focuses on user experience and usability, providing functionality relevant to both public and private network accesses.
• Interworking Requirements: Specifies the base functional requirements for interfacing private ISDNs with public ISDNs, including scenarios where the public network does not manage connected private network devices.
• Terminal and Numbering Plan Considerations: Notes the need for terminal compatibility with multiple numbering schemes, especially in private networks, promoting terminal interchangeability.

Applications

The Multiple Subscriber Number (MSN) supplementary service finds practical value in a range of ISDN applications:

• Small Office and Home Office Environments: Enables multiple devices (phones, fax machines, modems) to share a single ISDN line with distinct numbers, streamlining resource use and user experience.
• Private ISDN Networks: Supports organizations that operate private branch exchanges (PBX), providing individualized access and routing for terminals connected to a single network interface.
• Device Management: Allows precise identification of terminals for targeted service provisioning, such as call forwarding or number identification, enhancing control and security.
• Operational Efficiency: Reduces the need for multiple physical ISDN lines, optimizing infrastructure and associated costs.
• Interoperability: Ensures seamless operation across a variety of supplementary ISDN services (e.g., call waiting, call transfer, number identification) without mutual interference.
• Transition to Digital Networks: Supports organizations shifting from analog to digital telecommunications, facilitating gradual migration by leveraging flexible numbering and device assignment.

Related Standards

The implementation and interoperability of the MSN service within ISDN are further informed by associated standards:

• ETS 300 051: Defines stage two (functional capabilities and information flows) for the MSN supplementary service.
• ETS 300 052: Covers stage three (signaling and protocol requirements) for MSN.
• CCITT Recommendation I.130: Provides methods for characterizing telecommunications services and network capabilities.
• CCITT Recommendation E.164: Details the numbering plan for the ISDN era.
• ETS 300 089: Specifies the Calling Line Identification Presentation (CLIP) supplementary service.
• ECMA-155: Addresses private numbering plans and terminal interchangeability in private ISDNs.
• CCITT Recommendations I.112 and I.210: Offer terminology and principles for telecommunication services in ISDN.

For organizations utilizing or upgrading ISDN, adhering to SIST ETS 300 050 E1:2003 ensures standardized, robust management of multiple subscriber numbers, supporting future-proof and interoperable digital communication solutions.

SLOVENSKI STANDARD
01-december-2003
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YHþãWHYLOþQLQDURþQLN061±2SLVVWRULWYH
Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN)
supplementary service; Service Description
Ta slovenski standard je istoveten z: ETS 300 050 Edition 1
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.

EUROPEAN ETS 300 050
TELECOMMUNICATION October 1991
STANDARD
Source: ETSI TC-NA Reference: T/NA1(89)20
ICS: 33.080
ISDN, supplementary service
Key words:
Integrated Services Digital Network (ISDN);
Multiple Subscriber Number (MSN) supplementary service
Service description
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
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 1991. All rights reserved.
New presentation - see History box

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ETS 300 050: October 1991
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 050: October 1991
Contents
Foreword .5
1 Scope .7
2 Normative references.8
3 Definitions.8
4 Symbols and abbreviations .8
5 Description .9
6 Procedures.9
6.1 Provision and withdrawal .9
6.2 Normal procedures .9
6.2.1 Activation, deactivation and registration.9
6.2.2 Erasure.9
6.2.3 Invocation and operation .9
6.2.4 Interrogation .10
6.3 Exceptional procedures .10
6.3.1 Activation, deactivation and registration.10
6.3.2 Erasure.10
6.3.3 Invocation and operation .10
6.3.4 Interrogation .10
7 Intercommunication considerations.10
7.1 Interworking with non-ISDNs .10
7.2 Interworking with private ISDNs.10
8 Interaction with other supplementary services .11
8.1 Advice of charge services.11
8.1.1 Charging information at call set-up time.11
8.1.2 Charging information during the call.11
8.1.3 Charging information at the end of the call.11
8.2 Call waiting.11
8.3 Call hold .11
8.4 Call transfer.11
8.4.1 Explicit call transfer .11
8.4.2 Single step call transfer.11
8.5 Number identification services.11
8.5.1 Calling line identification presentation .11
8.5.2 Calling line identification restriction .12
8.5.3 Connected line identification presentation.12
8.6 Closed user group.12
8.7 Completion of calls to busy subscriber .12
8.8 Conference services .12
8.8.1 Conference call, add-on .12
8.8.2 Meet me conference .12
8.9 Direct dialling in.12
8.10 Diversion services.13
8.10.1 Call forwarding unconditional .13
8.10.2 Call forwarding busy.13
8.10.3 Call forwarding no reply.13
8.10.4 Call deflection.13
8.11 Freephone.13
8.12 Malicious call identification.13

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ETS 300 050: October 1991
8.13 Multiple subscriber number . 13
8.14 Subaddressing . 13
8.15 Terminal portability. 14
8.16 Three party. 14
8.17 User-user signalling. 14
Annex A (informative): Terminal interchangeability between public and private ISDNs. 15
Annex B (informative): Bibliography . 16
History. 17

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ETS 300 050: October 1991
Foreword
This European Telecommunication Standard (ETS) has been produced by the Network Aspects (NA)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
In accordance with CCITT Recommendation I.130 [1], 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.
This ETS details the stage 1 aspects (overall service description) for the Multiple Subscriber Number
(MSN) supplementary service. The stage 2 and stage 3 aspects are detailed in ETS 300 051 (1991) and
ETS 300 052 (1991), respectively.

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ETS 300 050: October 1991
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ETS 300 050: October 1991
1 Scope
This standard defines the stage one of the Multiple Subscriber Number (MSN) supplementary service for
the pan-European Integrated Services Digital Network (ISDN) as provided by European public
telecommunications operators. Stage one is an overall service description from the user's point of view
(see CCITT Recommendation I.130 [1]), but does not deal with the details of the human interface itself.
This standard defines the interworking requirements of private ISDNs with the public ISDN.
In addition this standard specifies the base functionality where the service is provided to the user via a
private ISDN.
This standard does not specify the additional requirements where the service is provided to the user via a
telecommunications network that is not an ISDN but does include interworking requirements of other
networks with the public ISDN.
Interactions with supplementary services not listed in Clause 8 are outside the scope of this standard.
Charging principles are outside the scope of this standard.
The Multiple Subscriber Number (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.
This standard is applicable to the stage two and stage three standards for the ISDN MSN supplementary
service. The terms "stage two" and "stage three" are also defined in CCITT Recommendation I.130 [1].
Where the text indicates the status of a requirement (i.e. as strict command or prohibition, as
authorisation leaving freedom, as a capability or possibility), this shall be reflected in the text of the
relevant stage two and stage three standards.
Furthermore, conformance to this standard is met by conforming to the stage three standards with the
field of application appropriate to the equipment being implemented. Therefore no method of testing is
provided for this standard.
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ETS 300 050: October 1991
2 Normative references
This standard incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to, or revisions of any of these publications
apply to this standard only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.
[1] CCITT Recommendation I.130 (1988): "Method for the characterisation of
telecommunication services supported by an ISDN and network capabilities of
an ISDN".
[2] CCITT Recommendation I.112 (1988): "Vocabulary of terms for ISDNs".
[3] CCITT Recommendation E.164 (1988): "Numbering plan for the ISDN era".
[4] ETS 300 089 (1991): "Integrated Services Digital Network (ISDN); Calling Line
Identification
...