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INTERNATIONAL STANDARD ISO/IEC 11801 Second edition 2002-09 Information technology Generic cabling for customer premises Reference number ISO/IEC 11801:2002(E) INTERNATIONAL STANDARD ISO/IEC 11801 Second edition 2002-09 Information technology Generic cabling for customer premises PRICE CODE ISO/IEC 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office Case postale 56 CH-1211 Genve 20 Switzerland For price, see current catalogue XB 2 11801 ISO/IEC:2002(E) CONTENTS FOREWORD.10 INTRODUCTION.11 1Scope .13 2Normative references.13 3Definitions, abbreviations and symbols .17 3.1Definitions .17 3.2Abbreviations.23 3.3Symbols .24 3.3.1Variables .24 3.3.2Indices.25 4Conformance .25 5Structure of the generic cabling system .26 5.1General .26 5.2Functional elements.26 5.3Cabling subsystems.27 5.3.1General.27 5.3.2Campus backbone cabling subsystem.27 5.3.3Building backbone cabling subsystem.28 5.3.4Horizontal cabling subsystem.28 5.3.5Design objectives.28 5.4Interconnection of subsystems.29 5.4.1General.29 5.4.2Centralised cabling architecture.30 5.5Accommodation of functional elements.30 5.6Interfaces .30 5.6.1Equipment interfaces and test interfaces.30 5.6.2Channel and permanent link .32 5.6.3External network interface.32 5.7Dimensioning and configuring.32 5.7.1Distributors .32 5.7.2Cables .34 5.7.3Work area cords and equipment cords .34 5.7.4Patch cords and jumpers .34 5.7.5Telecommunications outlet (TO) .35 5.7.6Consolidation point .36 5.7.7Telecommunications rooms and equipment rooms .36 5.7.8Building entrance facilities .36 5.7.9External services cabling .36 6Performance of balanced cabling.37 6.1General .37 6.2Layout .38 6.3Classification of balanced cabling.39 6.4Balanced cabling performance.39 6.4.1General.39 11801 ISO/IEC:2002(E) 3 6.4.2Return loss .39 6.4.3Insertion loss/attenuation.40 6.4.4NEXT.41 6.4.5Attenuation to crosstalk ratio (ACR).44 6.4.6ELFEXT.45 6.4.7Direct current (d.c.) loop resistance .47 6.4.8Direct current (d.c.) resistance unbalance.48 6.4.9Current carrying capacity.48 6.4.10 Operating voltage .48 6.4.11 Power capacity .48 6.4.12 Propagation delay.48 6.4.13 Delay skew .49 6.4.14 Unbalance attenuation .49 6.4.15 Coupling attenuation.50 7Reference implementations for balanced cabling .50 7.1General .50 7.2Balanced cabling .50 7.2.1General.50 7.2.2Horizontal cabling .50 7.2.3Backbone cabling.54 8Performance of optical fibre cabling.55 8.1General .55 8.2Component choice.55 8.3Channel attenuation.56 8.4Channel topology.56 8.5Propagation delay.58 9Cable requirements.58 9.1General .58 9.2Balanced cables .58 9.2.1Basic performance requirements.58 9.2.2Additional requirements .59 9.2.3Additional performance requirements for flexible cables.60 9.3Additional crosstalk considerations for cable sharing in balanced cables .60 9.3.1General.60 9.3.2Power summation in backbone cables.60 9.3.3Hybrid, multi-unit and cables connected to more than one TO.60 9.4Optical fibre cables.61 9.4.1Optical fibre types.61 9.4.2Generic performance requirements .61 9.4.3Multimode optical fibre cable.61 9.4.4Single-mode optical fibre cables .62 10Connecting hardware requirements.62 10.1 General requirements .62 10.1.1 Applicability .62 10.1.2 Location.63 10.1.3 Design .63 10.1.4 Operating environment.63 10.1.5 Mounting.63 4 11801 ISO/IEC:2002(E) 10.1.6 Installation practices.63 10.1.7 Marking and colour coding .64 10.2 Connecting hardware for balanced cabling .64 10.2.1 General requirements .64 10.2.2 Performance marking.64 10.2.3 Mechanical characteristics.64 10.2.4 Electrical characteristics .66 10.2.5 Telecommunications outlet requirements .72 10.2.6 Design considerations for installation.73 10.3 Optical fibre connecting hardware.74 10.3.1 General requirements .74 10.3.2 Marking and colour coding .74 10.3.3 Mechanical and optical characteristics.74 10.3.4 Telecommunications outlet requirements .75 10.3.5 Connection schemes for optical fibre cabling .75 11Screening practices .77 11.1 General .77 11.2 Electromagnetic performance .77 11.3 Earthing.78 12Administration.78 13Balanced cords.78 13.1 Introduction .78 13.2 Insertion loss.78 13.3 Return loss .79 13.4 NEXT.79 Annex A (normative) Balanced permanent link and CP link performance.82 A.1 General .82 A.2 Performance.82 A.2.1General.82 A.2.2Return loss .83 A.2.3Insertion loss/attenuation.84 A.2.4NEXT.85 A.2.5Attenuation to crosstalk ratio (ACR).88 A.2.6ELFEXT.89 A.2.7Direct current (d.c.) loop resistance .92 A.2.8Direct current (d.c.) resistance unbalance.93 A.2.9Propagation delay.93 A.2.10 Delay skew .94 Annex B (normative) Test procedures .96 B.1 General .96 B.2 Channel and link performance testing .96 B.2.1Testing balanced cabling channels, permanent links and CP links .96 B.2.2Testing optical fibre cabling channels .96 B.2.3Channel and link test sc

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