SIST ETS 300 059 E1:2003

• Abstract:

  T/NA1(89)16

• 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 300 059 ed.1 (1991-10) - Integrated Services Digital Network (ISDN); Subaddressing (SUB) supplementary service; Service Description

SIST ETS 300 059 E1:2003 is the SIST version of ETS 300 059 Edition 1 for the Integrated Services Digital Network (ISDN) Subaddressing (SUB) supplementary service. It gives the stage 1 service description, from the user’s point of view, for public ISDN operators and for implementers who need to handle SUB in call setup and call delivery.

What does SIST ETS 300 059 E1:2003 specify?

SIST ETS 300 059 E1:2003 specifies the stage 1 description of the ISDN SUB supplementary service. In practice, that means it explains what the service does, how users can use it, and how the network should treat subaddress information.

The document is organized into these main parts:

• Foreword
• Scope
• Normative references
• Definitions
• Symbols and abbreviations
• Description
• Procedures
• Intercommunication considerations
• Interaction with other supplementary services

The scope covers public ISDN, interworking with private ISDNs, and basic service behaviour when SUB is provided through a private ISDN. It also states that charging principles and interactions with supplementary services not listed in Clause 8 are outside the scope.

What are the key requirements of SIST ETS 300 059 E1:2003?

SIST ETS 300 059 E1:2003 defines how SUB works at the service level, and those service rules matter because they drive later implementation in stage 2 and stage 3 standards.

Service model and access types

The SUB supplementary service applies to both basic access and primary rate access. It lets the called user extend addressing beyond the ISDN number. In practice, that means a network or terminal can use extra addressing information to reach the right terminal or to invoke a specific process on that terminal.

How subaddress information is handled

If the calling user provides a subaddress during call setup, the network shall transport it transparently to the called user. The called user’s subaddress shall also be delivered unchanged. This matters because the network is not meant to interpret or alter the subaddress - it is passed through for the served user to interpret.

Subaddress size and network limit

The maximum subaddress size is 20 octets. The standard also introduces the Maximum Authorised Length of Subaddress Accepted by Network (MALSAN), which is the maximum number of subaddress octets a network can accept and transmit. For practical deployment, the text notes that some networks may initially be limited to four octets, so implementers need to check the shortest limit across all networks involved in a call.

Provision, withdrawal, and user handling

For the calling subscriber, provision is without prior arrangement, although prior arrangement may be needed to exceed the initial MALSAN value. For the called subscriber, provision may be general or by prior arrangement. Withdrawal is done by the service provider at the subscriber’s request or for administrative reasons. This tells operators how the service is offered and removed in real use.

Exceptional and interworking behaviour

If the called user has not subscribed, the network shall not send a called user subaddress. Any subaddress that exceeds MALSAN is discarded without indication to the calling user. If the subaddress cannot be transported between public and private ISDNs, or between ISDN and non-ISDN, it is discarded and the calling user is not told. In practice, that means service continuity depends on the capabilities of every network in the path.

Interaction with other supplementary services

Clause 8 records how SUB interacts with other supplementary services such as Calling Line Identification Presentation (CLIP), Connected Line Identification Presentation (COLP), and call forwarding. It also states that the original called party subaddress is not forwarded in unconditional and busy forwarding, and gives specific notes for no reply and call deflection. This is important for systems that combine numbering, identification, and diversion features.

What terms does SIST ETS 300 059 E1:2003 define?

SIST ETS 300 059 E1:2003 defines several core terms used throughout the service description.

• Integrated Services Digital Network (ISDN) - the digital network model used by the standard.
• Supplementary service - a service that adds to basic telecommunications service.
• ISDN number - the number format defined by E.164.
• Subaddress - extra addressing information defined by E.164.
• MALSAN - the maximum subaddress length a network can accept and transmit.
• Basic access - the ISDN access type used for the service.
• Primary rate access - the higher-capacity ISDN access type used for the service.

Who uses SIST ETS 300 059 E1:2003?

SIST ETS 300 059 E1:2003 is used by public telecommunications operators, private ISDN operators, and engineers who design or integrate ISDN switches and terminals. It is also relevant to quality managers and buyers who need to check whether equipment supports SUB call handling, subaddress transport, and interworking with other ISDN services. Terminal designers use it when they need the terminal to select a destination or trigger a process from subaddress information.

What changed in SIST ETS 300 059 E1:2003 from the previous edition?

SIST ETS 300 059 E1:2003 is identified as the first edition of ETS 300 059, dated October 1991. The document history also records a later PDF conversion in January 1996.

Which standards are used with SIST ETS 300 059 E1:2003?

SIST ETS 300 059 E1:2003 cites these companion standards and references:

• CCITT Recommendation I.130 - the three-stage method used to describe ISDN supplementary services
• CCITT Recommendation I.112 - definitions for ISDN terms and vocabulary
• CCITT Recommendation E.164 - numbering plan and subaddress definition
• CCITT Recommendation I.210 - principles and description methods for ISDN services
• ETS 300 060 - the stage 2 description for ISDN SUB
• ETS 300 061 - the stage 3 description for ISDN SUB
• ETS 300 089 - CLIP service description
• ETS 300 094 - COLP service description
• CCITT Recommendation Q.9 - switching and signalling vocabulary

What does the SIST ETS 300 059 E1:2003 document contain?

SIST ETS 300 059 E1:2003 contains a service description, operating procedures, and interaction rules for the SUB supplementary service. Clause 6 sets out provision, withdrawal, normal procedures, and exceptional procedures, including call setup and interrogation behavior. Clause 7 covers intercommunication with non-ISDNs and private ISDNs. Clause 8 gives the service interactions that matter in practice, especially number identification and call forwarding.

SLOVENSKI STANDARD
01-december-2003
Digitalno omrežje z integriranimi storitvami (ISDN) – Dopolnilna storitev:
podnaslavljanje (SUB) – Opis storitve
Integrated Services Digital Network (ISDN); Subaddressing (SUB) supplementary
service; Service Description
Ta slovenski standard je istoveten z: ETS 300 059 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 300 059
TELECOMMUNICATION October 1991
STANDARD
Source: ETSI TC-NA Reference: T/NA1(89)16
ICS: 33.080
ISDN, supplementary service
Key words:
Integrated Services Digital Network (ISDN);
Subaddressing (SUB) 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

Page 2
ETS 300 059: 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.

Page 3
ETS 300 059: October 1991
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions.8
4 Symbols and abbreviations .8
5 Description .9
5.1 Size of subaddress .9
6 Procedures.9
6.1 Provision and withdrawal .9
6.1.1 Calling subscriber.9
6.1.2 Called subscriber.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 .10
6.2.3.1 Calling user side .10
6.2.3.2 Called user side.10
6.2.4 Interrogation .10
6.3 Exceptional procedures .11
6.3.1 Activation, deactivation and registration.11
6.3.2 Erasure.11
6.3.3 Invocation and operation .11
6.3.4 Interrogation .11
7 Intercommunication considerations.11
7.1 Interworking with non-ISDNs .11
7.2 Interworking with private ISDNs.11
8 Interaction with other supplementary services .12
8.1 Advice of charge services.12
8.1.1 Charge advice at call set-up.12
8.1.2 Charge advice during the call.12
8.1.3 Charge advice at the end of a call.12
8.2 Call waiting.12
8.3 Call hold .12
8.4 Call transfer services .12
8.4.1 Explicit call transfer .12
8.4.2 Single step call transfer.12
8.5 Number identification services.12
8.5.1 Calling line identification presentation .12
8.5.2 Calling line identification restriction .12
8.5.3 Connected line identification presentation.13
8.5.4 Connected line identification restriction.13
8.6 Closed user group.13
8.7 Completion of calls to busy subscriber .13
8.8 Conference services .13
8.8.1 Conference call, add-on .13
8.8.2 Meet me conference .13
8.9 Direct dialling in.13
8.10 Diversion services.13

Page 4
ETS 300 059: October 1991
8.10.1 Call forwarding unconditional. 13
8.10.2 Call forwarding busy . 13
8.10.3 Call forwarding no reply . 14
8.10.4 Call deflection . 14
8.11 Freephone. 14
8.12 Malicious call identification. 14
8.13 Multiple subscriber number . 14
8.14 Subaddressing . 14
8.15 Terminal portability. 14
8.16 Three party. 14
8.17 User-user signalling. 14
History. 15

Page 5
ETS 300 059: 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 Subaddresing (SUB)
supplementary service. The stage 2 and stage 3 aspects are detailed in ETS 300 060 (1991) and
ETS 300 061 (1991), respectively.

Page 6
ETS 300 059: October 1991
Blank page
Page 7
ETS 300 059: October 1991
1 Scope
This standard defines the stage one of the subaddressing (SUB) 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.
Charging principles are outside the scope of this standard.
Interactions with supplementary services not listed in Clause 8 are outside the scope of this standard.
The Subaddressing (SUB) supplementary service allows the called (served) user to expand his
addressing capacity beyond the one given by the ISDN number.
The SUB supplementary service is applicable to all telecommunication services.
This standard is applicable to the stage two and stage three standards for the ISDN SUB 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, or 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.
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] CCITT Recommendation I.210 (1988): "Principles of telecommunication
services supported by an ISDN and the means to describe them".
[5] ETS 300 089 (1991): "Integrated Services Digital Network (ISDN); Calli
...