ISO/IEC 11801:2002

INTERNATIONAL ISO/IEC
STANDARD
11801
Second edition
2002-09
Information technology –
Generic cabling for customer premises
Reference number
ISO/IEC 11801:2002(E)

---------------------- Page: 1 ----------------------
INTERNATIONAL ISO/IEC
STANDARD
11801
Second edition
2002-09
Information technology –
Generic cabling for customer premises
 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 Genève 20 Switzerland
• • •
PRICE CODE
XB
For price, see current catalogue

---------------------- Page: 2 ----------------------
– 2 – 11801 © ISO/IEC:2002(E)
CONTENTS
FOREWORD .10
INTRODUCTION .11
1 Scope .13
2 Normative references.13
3 Definitions, abbreviations and symbols .17
3.1 Definitions .17
3.2 Abbreviations.23
3.3 Symbols .24
3.3.1 Variables .24
3.3.2 Indices.25
4 Conformance .25
5 Structure of the generic cabling system .26
5.1 General .26
5.2 Functional elements.26
5.3 Cabling subsystems.27
5.3.1 General.27
5.3.2 Campus backbone cabling subsystem.27
5.3.3 Building backbone cabling subsystem .28
5.3.4 Horizontal cabling subsystem.28
5.3.5 Design objectives.28
5.4 Interconnection of subsystems.29
5.4.1 General.29
5.4.2 Centralised cabling architecture.30
5.5 Accommodation of functional elements .30
5.6 Interfaces .30
5.6.1 Equipment interfaces and test interfaces.30
5.6.2 Channel and permanent link .32
5.6.3 External network interface.32
5.7 Dimensioning and configuring.32
5.7.1 Distributors .32
5.7.2 Cables .34
5.7.3 Work area cords and equipment cords .34
5.7.4 Patch cords and jumpers .34
5.7.5 Telecommunications outlet (TO) .35
5.7.6 Consolidation point .36
5.7.7 Telecommunications rooms and equipment rooms .36
5.7.8 Building entrance facilities .36
5.7.9 External services cabling .36
6 Performance of balanced cabling .37
6.1 General .37
6.2 Layout .38
6.3 Classification of balanced cabling.39
6.4 Balanced cabling performance.39
6.4.1 General.39

---------------------- Page: 3 ----------------------
11801 © ISO/IEC:2002(E) – 3 –
6.4.2 Return loss .39
6.4.3 Insertion loss/attenuation.40
6.4.4 NEXT.41
6.4.5 Attenuation to crosstalk ratio (ACR) .44
6.4.6 ELFEXT .45
6.4.7 Direct current (d.c.) loop resistance .47
6.4.8 Direct current (d.c.) resistance unbalance.48
6.4.9 Current 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
7 Reference implementations for balanced cabling .50
7.1 General .50
7.2 Balanced cabling .50
7.2.1 General.50
7.2.2 Horizontal cabling .50
7.2.3 Backbone cabling.54
8 Performance of optical fibre cabling .55
8.1 General .55
8.2 Component choice.55
8.3 Channel attenuation.56
8.4 Channel topology.56
8.5 Propagation delay.58
9 Cable requirements.58
9.1 General .58
9.2 Balanced cables .58
9.2.1 Basic performance requirements.58
9.2.2 Additional requirements .59
9.2.3 Additional performance requirements for flexible cables.60
9.3 Additional crosstalk considerations for cable sharing in balanced cables .60
9.3.1 General.60
9.3.2 Power summation in backbone cables.60
9.3.3 Hybrid, multi-unit and cables connected to more than one TO.60
9.4 Optical fibre cables.61
9.4.1 Optical fibre types.61
9.4.2 Generic performance requirements .61
9.4.3 Multimode optical fibre cable.61
9.4.4 Single-mode optical fibre cables .62
10 Connecting 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

---------------------- Page: 4 ----------------------
– 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
11 Screening practices .77
11.1 General .77
11.2 Electromagnetic performance .77
11.3 Earthing.78
12 Administration.78
13 Balanced 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.2.1 General.82
A.2.2 Return loss .83
A.2.3 Insertion loss/attenuation.84
A.2.4 NEXT.85
A.2.5 Attenuation to crosstalk ratio (ACR) .88
A.2.6 ELFEXT .89
A.2.7 Direct current (d.c.) loop resistance .92
A.2.8 Direct current (d.c.) resistance unbalance.93
A.2.9 Propagation 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.2.1 Testing balanced cabling channels, permanent links and CP links .96
B.2.2 Testing optical fibre cabling channels .96
B.2.3 Channel and link test schedules.96
B.3 Transmission testing of cords for balanced cabling .97
B.4 Transmission testing of components for cabling.98
B.4.1 Transmission testing of copper cables for balanced cabling .98

---------------------- Page: 5 ----------------------
11801 © ISO/IEC:2002(E) – 5 –
B.4.2 Transmission testing of connecting hardware for balanced cabling .98
B.4.3 Transmission testing of cables for optical cabling.98
B.4.4 Transmission testing of connectors for optical cabling.98
Annex C (normative)  Mechanical and environmental performance testing of
connecting hardware for balanced cabling .99
C.1 Introduction.99
C.2 Test requirements.99
C.2.1 General.99
C.2.2 Initial test measurements .99
C.2.3 Environmental and mechanical performance .100
Annex D (informative)  Electromagnetic characteristics .104
Annex E (informative)  Acronyms for balanced cables .105
Annex F (informative) Supported applications .107
F.1 Supported applications for balanced cabling .107
F.2 Supported applications for optical fibre cabling .109
Annex G (informative) Channel and permanent link models for balanced cabling .113
G.1 General .113
G.2 Insertion loss .113
G.2.1 Insertion loss of the channel configuration .113
G.2.2 Insertion loss of the permanent link configurations.114
G.2.3 Assumptions for insertion loss .114
G.3 NEXT.115
G.3.1 NEXT of the channel configuration.115
G.3.2 NEXT of the permanent link configurations .115
G.3.3 Assumptions for NEXT .116
G.4 ELFEXT .119
G.4.1 ELFEXT of the channel configuration .119
G.4.2 ELFEXT for the permanent link configurations .119
G.4.3 Assumptions for ELFEXT .120
G.5 Return loss .120
G.5.1 Return loss of the channel and permanent link configurations .120
G.5.2 Assumptions for the return loss circuit analysis method .121
Annex H (informative) Class F channel and permanent link with two connections.124
Annex I (informative) Significant changes to balanced cabling requirements with
respect to earlier editions of this International Standard.125
I.1 General .125
I.2 References .125
I.3 Structural elements.125
I.4 Product designation .125
I.5 Component requirements.125
I.6 Installed cabling requirements .126
Bibliography.132

---------------------- Page: 6 ----------------------
– 6 – 11801 © ISO/IEC:2002(E)
Figure 1 – Structure of generic cabling.27
Figure 2 – Hierarchical structure of generic cabling.29
Figure 3 – Structures for centralised generic cabling .29
Figure 4 – Accommodation of functional elements.30
Figure 5 – Interconnect models .31
Figure 6 – Cross-connect models .31
Figure 7 – Equipment and test interfaces .31
Figure 8 – Example of a generic cabling system with combined BD and FD.33
Figure 9 – Inter-relationship of functional elements in an installation with redundancy.34
Figure 10 – Channel, permanent link and CP link of a balanced cabling .37
Figure 11 – Example of a system showing the location of cabling interfaces
and extent of associated channels .38
Figure 12 – Horizontal cabling models.52
Figure 13 – Backbone cabling model.54
Figure 14 – Combined backbone/horizontal channels.57
Figure 15 – Eight-position outlet pin and pair grouping assignments (front view
of connector).73
Figure 16 – Duplex SC connectivity configuration.76
Figure 17 – Optical fibre patch cord .77
Figure A.1 – Link options .82
Figure E.1 – Cable naming schema.105
Figure E.2 – Cable types.106
Figure G.1 – Example of computation of NEXT with higher precision.116
Figure H.1 – Two connection channel and permanent link .124
Figure I.1 – Horizontal cabling model .127
Figure I.2 – Backbone cabling model.127

---------------------- Page: 7 ----------------------
11801 © ISO/IEC:2002(E) – 7 –
Table 1 – Maximum channel lengths .32
Table 2 – Return loss for channel.40
Table 3 – Informative return loss values for channel at key frequencies .40
Table 4 – Insertion loss for channel.41
Table 5 – Informative insertion loss values for channel at key frequencies .41
Table 6 – NEXT for channel .42
Table 7 – Informative NEXT values for channel at key frequencies.42
Table 8 – PS NEXT for channel.43
Table 9 – Informative PS NEXT values for channel at key frequencies .43
Table 10 – Informative ACR values for channel at key frequencies.44
Table 11 – Informative PS ACR values for channel at key frequencies .45
Table 12 – ELFEXT for channel.46
Table 13 – Informative ELFEXT values for channel at key frequencies.46
Table 14 – PS ELFEXT for channel .47
Table 15 – Informative PS ELFEXT values for channel at key frequencies .47
Table 16 – Direct current (d.c.) loop resistance for channel.47
Table 17 – Propagation delay for channel .48
Table 18 – Informative propagation delay values for channel at key frequencies .49
Table 19 – Delay skew for channel.49
Table 20 – Unbalance attenuation for channel.50
Table 21 – Horizontal link length equations .53
Table 22 – Backbone link length equations .55
Table 23 – Channel attenuation.56
Table 24 – Basic requirements of balanced cables .58
Table 25 – Mechanical characteristics of balanced cables.59
Table 26 – Optical fibre cable attenuation .61
Table 27 – Multimode optical fibre modal bandwidth.62
Table 28 – Mechanical characteristics of connecting hardware for use with
balanced cabling .65
Table 29 – Electrical characteristics of telecommunications outlets intended
for use with balanced cabling .67
Table 30 – Return loss .68
Table 31 – Insertion loss .68
Table 32 – Near end crosstalk (NEXT) .68
Table 33 – Power sum near end crosstalk (PS NEXT) .69
Table 34 – Far end crosstalk (FEXT).69
Table 35 – Power sum far end crosstalk (PS FEXT .70
Table 36 – Input to output resistance .70
Table 37 – Input to output resistance unbalance .70
Table 38 – Current carrying capacity.71
Table 39 – Propagation delay.71
Table 40 – Delay skew .71

---------------------- Page: 8 ----------------------
– 8 – 11801 © ISO/IEC:2002(E)
Table 41 – Transve
...