ISO/IEC 14709-1:1997/Amd 1:2004

Information technology — Configuration of Customer Premises Cabling (CPC) for applications — Part 1: Integrated Services Digital Network (ISDN) basic access — Amendment 1

Technologies de l'information — Configuration du câblage dans les locaux d'usagers (CPC) pour les applications — Partie 1: Accès de base au réseau numérique à intégration de services (RNIS) — Amendement 1

General Information

• Status: Published
• Publication Date: 29-Aug-2004
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Drafting Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: 6060 - International Standard published
• Start Date: 30-Aug-2004
• Due Date: 30-Jul-2004
• Completion Date: 30-Jul-2004

Relations

• Amends: ISO/IEC 14709-1:1997 - Information technology — Configuration of Customer Premises Cabling (CPC) for applications — Part 1: Integrated Services Digital Network (ISDN) basic access
• Effective Date: 06-Jun-2022
• Child: ISO/IEC 14709-1:1997 - Information technology — Configuration of Customer Premises Cabling (CPC) for applications — Part 1: Integrated Services Digital Network (ISDN) basic access
• Effective Date: 15-Apr-2008

Overview

ISO/IEC 14709-1:1997/Amd 1:2004 is an amendment to the international standard for Configuration of Customer Premises Cabling (CPC) for applications - Part 1: ISDN basic access. Amendment 1 updates the original part by replacing the dedicated ISDN cabling subclause on bus configurations with a generalized star configuration option aimed primarily at domestic and SOHO environments, and by adding a normative Annex A that reproduces Category 3 and Category 5 cable characteristics from ISO/IEC 11801:1995.

Key topics and technical requirements

• Star configuration for ISDN basic access
  • Intended for domestic / SOHO installations.
  • NT (Network Termination) must be configured in short passive bus mode.
  • Maximum branches: 4.
  • Maximum cable length (NT to farthest outlet in a branch):
    • 50 m when cables are Category 3 or mixed Category 3/Category 5 (ISO/IEC 11801:1995). Extension cords not permitted beyond 50 m.
    • 100 m when installed cables match Category 5 (ISO/IEC 11801:1995). Extension cords not permitted beyond 100 m.
  • Spurs are discouraged; if present they shall not exceed 1 m.
  • Maintain pair polarity throughout the cabling.
  • 100 Ω termination resistors must be permanently connected at the star point.
  • Maximum number of TEs (terminal equipment) attached: 4; maximum telecommunications outlets overall: 12 (implementation details in figures).
• Annex A (normative) provides the electrical characteristics and attenuation tables for Category 3 and Category 5 cables as defined in ISO/IEC 11801:1995 (included because ISO/IEC 11801 has since been updated).
• Normative references and safety/EMC: replaces IEC 603-7 with IEC 60603-7, adds EN 300 012-1; recommends IEC 60950-1 for safety and IEC 61000-4 / CISPR 22 for EMC.

Practical applications and users

This amendment is directly useful for:

• Telecommunications and cabling designers specifying ISDN basic access wiring for homes and small offices.
• Installers and field technicians implementing CPC using the star configuration and ensuring compliance with distance, spurs, polarity and termination rules.
• Facilities managers and project engineers selecting appropriate media (Category 3 vs Category 5) and verifying installed cable characteristics per Annex A.
• Compliance auditors and consultants assessing legacy ISDN installations or planning upgrades to meet interoperability and safety/EMC reference standards.

Related standards

• ISO/IEC 11801 (1995 and 2002) - generic cabling and Category 3/5 definitions (Annex A references edition 1995)
• EN 300 012-1 - ISDN Basic UNI Layer 1
• IEC 60603-7 - connector requirements
• IEC 60950-1 - IT equipment safety
• IEC 61000-4 series and CISPR 22 - EMC requirements

Keywords: ISO/IEC 14709-1, CPC, customer premises cabling, ISDN basic access, star configuration, Category 3, Category 5, ISO/IEC 11801, NT, TE, cabling standards.

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 14709-1
AMENDMENT 1
2004-08
Amendment 1
Information technology –
Configuration of customer premises
cabling (CPC) for applications –
Part 1:
Integrated services digital network (ISDN)
basic access
© IEC 2004 Droits de reproduction réservés ⎯ Copyright - all rights reserved
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
E
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 14709-1 Amend. 1 © ISO/IEC 2004(E)

FOREWORD
Amendment 1 to International Standard ISO/IEC 14709-1 was prepared by subcommittee 25:
Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
Information technology.
_______________________
Page ii
Contents
Add the following new title:
Annex A (normative) Characteristics of Category 3 and Category 5 (ISO/IEC 11801:1995)
cables
Add, after Annex B:
Bibliography
Page iii
Foreword
Add, after the third paragraph, the following two new paragraphs:
Amendment 1 (2004) replaces subclause 6.6 of ISO/IEC 14709-1 by a generalised
specification of the star configuration as another configuration option for dedicated ISDN
cabling.
The requirements in this part of ISO/IEC 14709 have been derived from ITU-T
Recommendation I.430 (Blue Book) and EN 300 012.

Delete the last paragraph of the introduction:
Annexes A and B of this part of ISO/IEC 14709 are for information only.

14709-1 Amend. 1 © ISO/IEC 2004(E) – 3 –
Page iv
Introduction
Add, after the existing paragraph, the following two new paragraphs:
For general safety requirements refer to IEC 60950-1 and for EMC requirements refer to
IEC 61000-4 and CISPR 22.
Category 3 and category 5 cable definitions and requirements used in this standard are from
the first edition of ISO/IEC 11801 (1995). The relevant values are given in Annex A, since the
first edition of ISO/IEC 11801 has been replaced. Category 5 cable requirements as stated in
ISO/IEC 11801 (first edition, 1995) are less stringent and do not include additional
requirements specified in ISO/IEC 11801 (second edition, 2002).
Page 1
Scope
Add, at the end of the scope, the following new paragraph:
General safety and EMC requirements have not been included in this standard.

Page 1
2 Normative references
Replace “IEC 603-7” by “IEC 60603-7”.
This change applies to the whole document.
Add the following new document after publication IEC 60603-7:
EN 300 012-1, Integrated Services Digital Network (ISDN) – Basic User-Network Interface
(UNI) – Part 1: Layer 1 specification
Page 2
4.1 Abbreviations
Add:
CP Consolidation point
Page 8
6.6 The star configuration
Replace the existing text of subclause 6.6 by the following new text and renumber the
following figures accordingly.

– 4 – 14709-1 Amend. 1 © ISO/IEC 2004(E)
The star configuration which is shown in Figure 6a) is primarily intended for the domestic and
small office/home office (SOHO) environment.
Requirements
The NT shall be configured in short passive bus mode. The maximum number of branches
shall be 4 (four). The maximum length of cabling from the NT to the farthest
telecommunications outlet in any branch (i.e. d + d ) shall not exceed
8 9
a) 50 m, if either installed balanced cables match Category 3 or if d and d are implemented
8 9
mixing Category 3 and Category 5 (ISO/IEC 11801:1995) cables. Extension cords shall
not be used to extend the cabling distance from NT to the socket beyond 50 m,
b) 100 m, if installed balanced cables match Category 5 (ISO/IEC 11801:1995). Extension
cords shall not be used to extend the cabling distance from NT to the socket beyond
100 m.
NOTE For this application the minimum requirements of Category 3 cables and Category 5 cables as specified in
the first edition of ISO/IEC 11801:1995 are applicable, see Annex A. For this application the low frequency
requirements given in Annex A are not explicitly specified in ISO/IEC 11801: 2002.
It is recommended not to use spurs to connect telecommunications outlets. However, if spurs
are present they shall not exceed 1 m.
The polarity of each wire of the balanced cable unit shall be maintained throughout the
cabling.
The 100 Ω termination resistors shall be permanently connected to the star point for proper
administration of this configuration.
The maximum number of telecommunications outlets in a branch may exceed 1 (one)
provided that the maximum number of TEs attached does not exceed 4 (four).
The individual branches of the star configuration may be connected at the star point in the
following ways:
⎯ hardwired (as indicated in Figure 6a);
⎯ using connecting hardware in accordance with ISO/IEC 11801 (see Figure 6b).

14709-1 Amend. 1 © ISO/IEC 2004(E) – 5 –
a) Star configuration
d
d
Star
point
NT
*)
TE
d Length from the star point to the farthest telecommunications outlet in any
branch
d Length from the star point to NT
*) TE connecting cord or integral cord
Maximum number of telecommunications outlets: 12 (twelve)
Maximum number of terminals: 4 (four)
b) Implementation example of connections at the star point
towards NT
connector panel
Figure 6 – ISDN star configuration
Renumber figures 6 to 9 accordingly.

6.7.1 General
Figure on page 9 (previously Figure 6, now Figure 7):
Replace “TP” with “CP” and replace the existing NOTE by the following new NOTE:
NOTE In installations that were implemented on the basis of the replaced publication ISO/IEC:11801:1995
(edition 1.0) and ISO/IEC 11801:2000 (edition 1.2) TPs may be found instead of CP
...