ISO/IEC 14709-1:1997/AMD1:2004

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
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– 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 : 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
...