ISO/IEC 11801:1995/Amd 1:1999

DRAFT AMENDMENT ISO/IEC 1 1801 :I 995/DAM 1
ISO/IEC JTC 1 Secretariat: ANSI
Voting begins on Voting terminates on
1997-05-29 1997-09-29
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEWYHAPORHAR OPrAHM3AUHR no CïAHRAPTH3AUHH ORGANISATION INTERNATIONALE DE NORMALISATION
INTERNATIONAL ELECTROTECHNICAL COMMISSION MEWYHAPORHAR 3liEKTPOTEXHHqECKAR KOMHCCHR COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
Information technology - Generic cabling for customer
premises
AMENDMENT 1
@ Technologies de l'information - Câblage générique des locaux du client
AMENDEMENT 1
Descriptors: data processing, information interchange, telecommunications, buildings, premises, communication
cables, cabling, specifications, performance, verification.
In accordance with the provisions of Council Resolution 21/1986 this document is submitted in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 21/1986, ce document est distribué
en version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee secretariat.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité.
'4
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO
AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH
REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
International Organization for Standardization, 1997
@ International Electrotechnical Commission, 1997

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ISO/IEC JOINT TECHNICAL COMMITTEE 1
SUBCOMMITTEE No 25: INTERCONNECTION OF
INFORMATION TECHNOLOGY EQUIPMENT
WORKING GROUP 3 : CUSTOMER PREMISES CABLING.
t
CHANGES to ISO/IEC 11801 1 st edition
I
DAM 1.1 to the ISO/IEC 11801
Page 15
Subclause 5.5 Telecommunications outlets
Replace 3rd paragraph with:
1)
A minimum of one TO served by 100 R or 120 R cable shall be provided at each work area (100 S2
preferred). Other TOs shall be supported by either balanced cable or by fibre optical cable2). In the
horizontal cabling, at least one TO shall be configured as specified in item b of 6.1.3 (balanced or
e
optical fibre cable) or at least one TO shall be served by either class D or optical class, as identified in
7.1 .I. When a TO is supported by balanced cable, 2 pairs31 or 4 pairs shall be provided at each TO; all
pairs shall be terminated. If less than four pairs are provided, the outlet shall be clearly marked4).
Emerging balanced cable applications may be limited by differential delay of pairs that serve a single
telecommunications outlet. See clause 9 for TO specifications that correspond to each of the cables
listed above.
replace footnotes with:
1) When the greatest flexibility is desired, four pair or two quad cable should be used (see Annex G).
2) When the largest bandwidth is desired the use of OF is recommended .
3) Installation of 2 pairs not capable of forming class D links may limit the applications supported.
42 See annex G for number and performance of pairs needed for different applications and their pin assignment.
Page 25
Subclause 7.2.1 Characteristic impedance
Replace first paragraph with:
The nominal characteristic impedance of a link shall be 1 O0 R, 120 R, or 15
...