ISO/IEC 11801:2002

ISO/IEC 11801
Edition 2.2 2011-06
INTERNATIONAL
STANDARD
Information technology – Generic cabling for customer premises

ISO/IEC 111801:2002+A1:2008+A2:2010(E)

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
either IEC or IEC's member National Committee in the country of the requester.

If you have any questions about ISO/IEC copyright or have an enquiry about obtaining additional rights to this

publication, please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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It also gives information on projects, withdrawn and replaced publications.
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in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
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Fax: +41 22 919 03 00
ISO/IEC 11801
Edition 2.2 2011-06
INTERNATIONAL
STANDARD
Information technology – Generic cabling for customer premises

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
CE
ICS 35.200 ISBN 978-2-88912-194-6

– 2 – 11801 © ISO/IEC:2002+A1:2008

+A2:2010(E)
CONTENTS
FOREWORD . 12

INTRODUCTION . 14

1 Scope . 16

2 Normative references . 16

3 Terms, definitions, abbreviations and symbols . 20

3.1 Terms and definitions . 20
3.2 Abbreviations . 30
3.3 Symbols . 32
3.3.1 Variables . 32
3.3.2 Indices . 33
4 Conformance . 33
5 Structure of the generic cabling system . 34
5.1 General . 34
5.2 Functional elements . 34
5.3 Cabling subsystems . 35
5.3.1 General . 35
5.3.2 Campus backbone cabling subsystem . 36
5.3.3 Building backbone cabling subsystem . 36
5.3.4 Horizontal cabling subsystem . 36
5.3.5 Design objectives . 37
5.4 Interconnection of subsystems . 37
5.4.1 General . 37
5.4.2 Centralised cabling architecture. 38
5.5 Accommodation of functional elements . 39
5.6 Interfaces . 39
5.6.1 Equipment interfaces and test interfaces . 39
5.6.2 Channel and permanent link . 41
5.6.3 External network interface . 41
5.7 Dimensioning and configuring. 41
5.7.1 Distributors . 41
5.7.2 Cables . 43

5.7.3 Work area cords and equipment cords . 43
5.7.4 Patch cords and jumpers . 43
5.7.5 Telecommunications outlet (TO) . 43
5.7.6 Consolidation point . 45
5.7.7 Telecommunications rooms and equipment rooms . 45
5.7.8 Building entrance facilities . 45
5.7.9 External services cabling . 45
6 Performance of balanced cabling . 46
6.1 General . 46
6.2 Layout . 47
6.3 Classification of balanced cabling . 48

11801 © ISO/IEC:2002+A1:2008 – 3 –

+A2:2010(E)
6.4 Balanced cabling performance . 48

6.4.1 General . 48

6.4.2 Return loss . 48

6.4.3 Insertion loss/attenuation . 50

6.4.4 NEXT . 51

6.4.5 Attenuation to crosstalk ratio at the near-end (ACR-N) . 55

6.4.6 Attenuation to crosstalk ratio at the far-end (ACR-F). 56

6.4.7 Direct current (d.c.) loop resistance . 59

6.4.8 Direct current (d.c.) resistance unbalance. 59

6.4.9 Current carrying capacity . 59
6.4.10 Dielectric withstand . 60
6.4.11 Power capacity . 60
6.4.12 Propagation delay . 60
6.4.13 Delay skew . 61
6.4.14 Unbalance attenuation and coupling attenuation . 61
6.4.15 Alien crosstalk . 63
7 Reference implementations for balanced cabling . 69
7.1 General . 69
7.2 Balanced cabling . 69
7.2.1 General . 69
7.2.2 Horizontal cabling . 70
7.2.3 Backbone cabling . 73
8 Performance of optical fibre cabling . 75
8.1 General . 75
8.2 Component choice . 76
8.3 Channel attenuation . 76
8.4 Channel topology . 76
8.5 Propagation delay . 78
9 Cable requirements . 78
9.1 General . 78
9.2 Balanced cables . 78
9.2.1 Performance for balanced cables. 78
9.2.2 Additional requirements . 79
9.2.3 Additional performance requirements for flexible cables . 82

9.3 Additional crosstalk considerations for balanced cables . 82
9.3.1 Cable sharing . 82
9.3.2 Power summation in backbone cables . 82
9.3.3 Hybrid, multi-unit and cables connected to more than one TO . 83
9.4 Optical fibre cable (cabled optical fibres) . 83
9.4.1 Cabled optical fibre Categories . 83
9.4.2 Generic performance requirements . 83
9.4.3 Multimode optical fibre cable . 83
9.4.4 Single-mode optical fibre cables . 84
10 Connecting hardware requirements . 85
10.1 General requirements . 85

– 4 – 11801 © ISO/IEC:2002+A1:2008

+A2:2010(E)
10.1.1 Applicability . 85

10.1.2 Location . 85

10.1.3 Design . 86

10.1.4 Operating environment . 86

10.1.5 Mounting . 86

10.1.6 Installation practices . 86

10.1.7 Marking and colour coding . 87

10.2 Connecting hardware for balanced cabling . 87

10.2.1 General requirements . 87

10.2.2 Performance marking . 87

10.2.3 Mechanical characteristics . 87
10.2.4 Electrical characteristics . 89
10.2.5 TO requirements . 100
10.2.6 Design considerations for installation . 102
10.3 Optical fibre connecting hardware . 102
10.3.1 General requirements . 102
10.3.2 Marking and colour coding . 103
10.3.3 Mechanical and optical characteristics . 103
10.3.4 TO requirements . 104
10.3.5 Connection schemes for optical fibre cabling . 104
11 Screening practices . 107
11.1 General . 107
11.2 Electromagnetic performance . 107
11.3 Earthing . 107
12 Administration . 108
13 Balanced cords . 108
13.1 Introduction . 108
13.2 Insertion loss . 108
13.3 Return loss . 109
13.4 NEXT . 109
Annex A (normative) Balanced permanent link and CP link performance . 113
A.1 General . 113
A.2 Balanced cabling . 114
A.2.1 General . 114
A.2.2 Return loss . 115
A.2.3 Insertion loss/attenuation . 116
A.2.4 NEXT . 118
A.2.5 Attenuation to crosstalk ratio at the near-end (ACR-N) . 122
A.2.6 Attenuation to crosstalk ratio at the far-end (ACR-F). 124
A.2.7 Direct current (d.c.) loop resistance . 127
A.2.8 Direct current (d.c.) resistance unbalance. 128
A.2.9 Propagation delay . 129
A.2.10 Delay skew . 130
A.2.11 Alien crosstalk . 132
Annex B (normative) Test procedures . 139

11801 © ISO/IEC:2002+A1:2008 – 5 –

+A2:2010(E)
B.1 General . 139

B.2 Channel and link performance testing . 139

B.2.1 General . 139

B.2.2 Installation conformance testing of balanced cabling channels, permanent

links and CP links . 139

B.2.3 Installation conformance testing of optical fibre cabling channels . 140

B.3 Overview of test regimes . 140

Annex C (normative)  Mechanical and environmental performance testing of connecting

hardware for balanced cabling . 144

C.1 Overview . 144
C.2 Solderless connections . 144
C.3 Free and fixed connectors (modular plugs and jacks) . 145
C.4 Other connecting hardware . 146
Annex D (informative) . 148
Annex E (informative)  Acronyms for balanced cables . 149
Annex F (informative) Supported applications . 152
F.1 Supported applications for balanced cabling . 152
F.2 Supported applications for optical fibre cabling . 155
Annex G (informative) Channel and permanent link models for balanced cabling . 161
G.1 General . 161
G.2 Insertion loss . 161
G.2.1 Insertion loss of the channel configuration . 161
G.2.2 Insertion loss of the permanent link configurations . 162
G.2.3 Assumptions for insertion loss . 162
G.3 NEXT . 163
G.3.1 NEXT of the channel configuration . 163
G.3.2 NEXT of the permanent link configurations . 163
G.3.3 Assumptions for NEXT. 164
G.4 ACR-F . 167
G.4.1 ACR-F of the channel configuration . 167
G.4.2 ACR-F for the permanent link configurations . 167
G.4.3 Assumptions for ACR-F . 168
G.5 Return loss . 168
G.5.1 Return loss of the channel and permanent link configurations . 168

G.5.2 Assumptions for the return loss circuit analysis method . 169
G.6 PS ANEXT link modelling . 171
G.6.1 General . 171
G.6.2 PS ANEXT between connectors . 171
G.6.3 PS ANEXT between cable segments . 171
G.6.4 Principles of link modelling . 172
G.7 PS AACR-F link modelling . 172
G.7.1 General . 172
G.7.2 PS AFEXT between connectors . 172
G.7.3 PS AACR-F between cable segments . 172
G.7.4 Principles of link modelling . 173

– 6 – 11801 © ISO/IEC:2002+A1:2008

+A2:2010(E)
G.7.5 Impact of PS AACR-F in channels and links with substantially different

lengths . 173

G.8 Component assumptions for modelling purposes . 175

Annex H (informative) Significant changes to balanced cabling requirements with respect to

earlier editions of this International Standard . 178

H.1 General . 178

H.2 References . 178

H.3 Structural elements . 178

H.4 Product designation . 178

H.5 Component requirements . 178

H.6 Installed cabling requirements . 179
Figure 1 – Structure of generic cabling . 35
Figure 2 – Hierarchical structure of generic cabling. 37
Figure 3 – Structures for centralised generic cabling . 38
Figure 4 – Accommodation of functional elements . 39
Figure 5 – Interconnect models . 40
Figure 6 – Cross-connect models . 40
Figure 7 – Equipment and test interfaces . 40
Figure 8 – Example of a generic cabling system with combined BD and FD . 42
Figure 9 – Inter-relationship of functional elements in an installation with redundancy . 43
Figure 10 – Balanced cabling: channel, permanent link and CP link . 46
Figure 11 – Example of a system showing the location of cabling interfaces and extent of
associated channels . 47
Figure 12 – Horizontal cabling models . 72
Figure 13 – Backbone cabling model . 74
Figure 14 – Combined backbone/horizontal channels . 77
Figure 15 – Pin grouping and pair assignments for IEC 60603-7 series interface for
Categories 5, 6 and 6 (front view of fixed connector (jack), not to scale). 100
A
Figure 16 – Pin grouping and pair assignment for the IEC 60603-7 series interface for
Categories 7 and 7 . 101
A
Figure 17 – Pin grouping and pair assignments for Categories 7 and 7 (IEC 61076-3-104)
A
interface . 101
Figure 18 – Duplex-able LC connectivity configuration with an example of polarity

identification . 105
Figure 19 – Duplex SC connectivity configuration . 106
Figure 20 – Optical fibre cord . 107

Figure A.1 – Link options . 114

Figure E.1 – Cable naming schema . 150
Figure E.2 – Examples of cable types . 151

Figure G.1 – Example of computation of NEXT with higher precision . 164

11801 © ISO/IEC:2002+A1:2008 – 7 –

+A2:2010(E)
Figure G.2 – Example of increased impact of PS AFEXT. . 173

Figure H.1 – Horizontal cabling model . 180

Figure H.2 – Backbone cabling model . 180

Table 1 – Maximum channel lengths . 41

Table 2 – Return loss for channel . 49

Table 3 – Informative return loss values for channel at key frequencies . 50

Table 4 – Insertion loss for channel . 51

Table 5 – Informative insertion loss values for channel at key frequencies . 51
Table 6 – NEXT for channel . 52
Table 7 – Informative NEXT values for channel at key frequencies . 53
Table 8 – PS NEXT for channel . 54
Table 9 – Informative PS NEXT values for channel at key frequencies . 54
Table 10 – Informative ACR-N values for channel at key frequencies . 55
Table 11 – Informative PS ACR-N values for channel at key frequencies . 56
Table 12 – ACR-F for channel . 57
Table 13 – Informative ACR-F values for channel at key frequencies . 57
Table 14 – PS ACR-F for channel . 58
Table 15 – Informative PS ACR-F values for channel at key frequencies . 59
Table 16 – Direct current (d.c.) loop resistance for channel . 59
Table 17 – Current carrying capacity for channel . 60
Table 18 – Propagation delay for channel . 60
Table 19 – Informative propagation delay values for channel at key frequencies . 61
Table 20 – Delay skew for channel . 61
Table 21 – TCL for channel for unscreened systems . 62
Table 22 – ELTCTL for channel for unscreened systems . 62
Table 23 – Coupling attenuation for channel for screened systems . 63
Table 24 – PS ANEXT for channel . 64
Table 25 – Informative PS ANEXT values for channel at key frequencies . 64
Table 26 – PS ANEXT for channel . 65
avg
Table 27 – Informative PS ANEXT values for channel at key frequencies . 66
avg
Table 28 – PS AACR-F for channel . 68
Table 29 – Informative PS AACR-F values for channel at key frequencies . 68
Table 30 – PS AACR-F for channel . 69
avg
Table 31 – Informative PS AACR-F values for channel at key frequencies . 69

avg
Table 32 – Length assumptions used in the mathematical modelling of balanced horizontal
cabling . 72
Table 33 – Horizontal channel length equations . 73
Table 34 – Backbone channel length equations . 75
Table 35 – Channel attenuation . 76

– 8 – 11801 © ISO/IEC:2002+A1:2008

+A2:2010(E)
Table 36 – Performance for balanced cables . 79

Table 37 – Mechanical characteristics of balanced cables . 79

Table 38 – ACR-F for cables . 80

Table 39 – Informative ACR-F values for cables at key frequencies . 80

Table 40 – PS ACR-F for cables . 81

Table 41 – Informative PS ACR-F values for cables at key frequencies . 81

Table 42 – Current carrying capacity for channel . 81

Table 43 – Cabled optical fibre attenuation . 83

Table 44 – Multimode optical fibre modal bandwidth . 84
Table 45 – Mechanical characteristics of connecting hardware for use with balanced cabling88
Table 46 – Electrical characteristics of TOs intended for use with balanced cabling . 89
Table 47 – Return loss for connector . 90
Table 48 – Informative return loss values for connector at key frequencies . 90
Table 49 – Insertion loss for connector . 91
Table 50 – Informative insertion loss values for connector at key frequencies . 91
Table 51 – Near end crosstalk (NEXT) for connector . 92
Table 52 – Informative NEXT values for connector at key frequencies . 92
Table 53 – Power sum near end crosstalk (PS NEXT) for connector (for information only) . 92
Table 54 – Informative PS NEXT values for connector at key frequencies . 93
Table 55 – Far end crosstalk (FEXT) for connector . 93
Table 56 – Informative FEXT values for connector at key frequencies . 94
Table 57 – Power sum far end crosstalk (PS FEXT) for connector (for information only) . 94
Table 58 – Informative PS FEXT values for connector at key frequencies . 94
Table 59 – Input to output resistance . 95
Table 60 – Input to output resistance unbalance . 95
Table 61 – Current carrying capacity. 95
Table 62 – Propagation delay . 95
Table 63 – Delay skew . 96
Table 64 – Transverse conversion loss (TCL) . 96
Table 65 – Informative TCL values for connector at key frequencies . 96
Table 66 – Transverse conversion transfer loss (TCTL) . 97

Table 67 – Informative TCTL values for connector at key frequencies . 97
Table 68 – Transfer impedance (screened connectors only) . 97
Table 69 – Informative transfer impedance values (screened connectors only) at key
frequencies . 97
Table 70 – Coupling attenuation (screened connectors only) . 98
Table 71 – Informative coupling attenuation values (screened connectors only) at key
frequencies . 98
Table 72 – Insulation resistance . 98
Table 73 – Voltage proof . 98
Table 74 – Power sum alien near end crosstalk (PS ANEXT) . 99

11801 © ISO/IEC:2002+A1:2008 – 9 –

+A2:2010(E)
Table 75 – Informative PS ANEXT values at key frequencies . 99

Table 76 – Power sum alien far end crosstalk (PS AFEXT) . 99

Table 77 – Informative PS AFEXT values at key frequencies . 100

Table 78 – Matrix of backward compatible mated free and fixed connector (plug and jack)
performance . 102

Table 79 – Mechanical and optical characteristics of optical fibre connecting hardware . 104

Table 80 – Minimum return loss for balanced cords . 109

Table 81 – Informative values of return loss for balanced cords at key frequencies . 109

Table 82 – Assumptions for cabling components used in the calculation of NEXT informative
values . 111
Table 83 – Informative values of NEXT for 2 m balanced cords at key frequencies . 111
Table 84 – Informative values of NEXT for 5 m balanced cords at key frequencies . 111
Table 85 – Informative values of NEXT for 10 m balanced cords at key frequencies . 112

Table A.1 – Return loss for permanent link or CP link . 115
Table A.2 – Informative return loss values for permanent link at key frequencies . 116
Table A.3 – Insertion loss for permanent link or CP link . 117
Table A.4 – Informative insertion loss values for permanent link with maximum
implementation at key frequencies . 118
Table A.5 – NEXT for permanent link or CP link . 119
Table A.6 – Informative NEXT values for permanent link with maximum implementation at
key frequencies . 120
Table A.7 – PS NEXT for permanent link or CP link . 121
Table A.8 – Informative PS NEXT values for permanent link with maximum implementation at
key frequencies . 122
Table A.9 – Informative ACR-N values for permanent link with maximum implementation at
key frequencies . 123
Table A.10 – Informative PS ACR-N values for permanent link with maximum implementation
at key frequencies . 124
Table A.11 – ACR-F for permanent link or CP link . 125
Table A.12 – Informative ACR-F values for permanent link with maximum implementation at
key frequencies . 126
Table A.13 – PS ACR-F for permanent link or CP link . 127

Table A.14 – Informative PS ACR-F values for permanent link with maximum implementation
at key frequencies . 127
Table A.15 – Direct current (d.c.) loop resistance for permanent link or CP link . 128
Table A.16 – Informative d.c. loop resistance for permanent link with maximum
implementation . 128
Table A.17 – Propagation delay for permanent link or CP link . 129
Table A.18 – Informative propagation delay values for permanent link with maximum
implementation at key frequencies . 130
Table A.19 – Delay skew for permanent link or CP link . 131
Table A.20 – Informative delay skew for permanent link with maximum implementation . 131

– 10 – 11801 © ISO/IEC:2002+A1:2008

+A2:2010(E)
Table A.21 – PS ANEXT for permanent link or CP link . 133

Table A.22 – Informative PS ANEXT values for permanent link at key frequencies . 133

Table A.23 – PS ANEXT for permanent link or CP link . 134
avg
Table A.24 – Informative PS ANEXT values for permanent link at key frequencies . 134
avg
Table A.25 – PS AACR-F for permanent link or CP link . 136

Table A.26– Informative PS AACR-F values for permanent link at key frequencies . 137

Table A.27 – PS AACR-F for permanent link or CP link . 137

avg
Table A.28– Informative PS AACR-F values for permanent link at key frequencies . 138
avg
Table B.1 – Test regime for reference conformance and installation conformance – Balanced
cabling . 141
Table B.2 – Test regime for reference conformance and installation conformance – Optical
fibre cabling . 143

Table C.1 – Standards for solderless connections . 144
Table C.2 – Standards for free and fixed connectors (modular plugs and jacks) . 145
Table C.3 – Free and fixed connectors (modular plugs and jacks) operations matrix . 146
Table C.4 – Reference for reliability testing of other connecting hardware . 146
Table C.5 – Other connecting hardware operations matrix . 147

Table F.1 – Applications using balanced cabling . 153
Table F.2 – Modular connector pin assignment for applications . 155
Table F.3 – Supported applic
...

ISO/IEC 11801
Edition 2.1 2008-05
INTERNATIONAL
STANDARD
Information technology –
Generic cabling for customer premises

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
either IEC or IEC's member National Committee in the country of the requester.

If you have any questions about ISO/IEC copyright or have an enquiry about obtaining additional rights to this

publication, please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
ISO/IEC 11801
Edition 2.1 2008-05
INTERNATIONAL
STANDARD
Information technology –
Generic cabling for customer premises

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
CC
ICS 35.200 ISBN 2-8318-9775-0
– 2 – 11801 © ISO/IEC:2002+A1:2008(E)

CONTENTS
FOREWORD.10

INTRODUCTION.12

1 Scope.14

2 Normative references .14

3 Terms, definitions, abbreviations and symbols.18

3.1 Terms and definitions .18
3.2 Abbreviations .27
3.3 Symbols .28
4 Conformance.30
5 Structure of the generic cabling system .30
5.1 General .30
5.2 Functional elements .31
5.3 Cabling subsystems .31
5.3.1 General .31
5.3.2 Campus backbone cabling subsystem .32
5.3.3 Building backbone cabling subsystem.32
5.3.4 Horizontal cabling subsystem .32
5.3.5 Design objectives .33
5.4 Interconnection of subsystems .33
5.4.1 General .33
5.4.2 Centralised cabling architecture.34
5.5 Accommodation of functional elements.34
5.6 Interfaces .35
5.6.1 Equipment interfaces and test interfaces .35
5.6.2 Channel and permanent link .36
5.6.3 External network interface .36
5.7 Dimensioning and configuring.36
5.7.1 Distributors.36
5.7.2 Cables.39
5.7.3 Work area cords and equipment cords.39
5.7.4 Patch cords and jumpers .39

5.7.5 Telecommunications outlet (TO) .40
5.7.6 Consolidation point.41
5.7.7 Telecommunications rooms and equipment rooms.41
5.7.8 Building entrance facilities.41
5.7.9 External services cabling.41
6 Performance of balanced cabling.42
6.1 General .42
6.2 Layout .43
6.3 Classification of balanced cabling.44
6.4 Balanced cabling performance .44
6.4.1 General .44
6.4.2 Return loss .44
6.4.3 Insertion loss/attenuation.46

11801 © ISO/IEC:2002+A1:2008(E) – 3 –

6.4.4 NEXT .47

6.4.5 Attenuation to crosstalk ratio at the near-end (ACR-N) .50

6.4.6 Attenuation to crosstalk ratio at the far-end (ACR-F).51

6.4.7 Direct current (d.c.) loop resistance .54

6.4.8 Direct current (d.c.) resistance unbalance.55

6.4.9 Current carrying capacity.55

6.4.10 Dielectric withstand .55

6.4.11 Power capacity .55

6.4.12 Propagation delay .55

6.4.13 Delay skew.56

6.4.14 Unbalance attenuation and coupling attenuation.56
6.4.15 Alien crosstalk .58
7 Reference implementations for balanced cabling .64
7.1 General .64
7.2 Balanced cabling.64
7.2.1 General .64
7.2.2 Horizontal cabling.65
7.2.3 Backbone cabling .68
8 Performance of optical fibre cabling.69
8.1 General .69
8.2 Component choice.70
8.3 Channel attenuation .70
8.4 Channel topology .70
8.5 Propagation delay .72
9 Cable requirements .72
9.1 General .72
9.2 Balanced cables .72
9.2.1 Basic performance requirements .72
9.2.2 Additional requirements .73
9.2.3 Additional performance requirements for flexible cables .74
9.3 Additional crosstalk considerations for cable sharing in balanced cables .74
9.3.1 General .74
9.3.2 Power summation in backbone cables .74
9.3.3 Hybrid, multi-unit and cables connected to more than one TO .74
9.4 Optical fibre cables.75

9.4.1 Optical fibre types .75
9.4.2 Generic performance requirements.75
9.4.3 Multimode optical fibre cable .75
9.4.4 Single-mode optical fibre cables .76
10 Connecting hardware requirements .76
10.1 General requirements.76
10.1.1 Applicability .76
10.1.2 Location .77
10.1.3 Design.77
10.1.4 Operating environment .77
10.1.5 Mounting .77
10.1.6 Installation practices.77
10.1.7 Marking and colour coding.78

– 4 – 11801 © ISO/IEC:2002+A1:2008(E)

10.2 Connecting hardware for balanced cabling .78

10.2.1 General requirements .78

10.2.2 Performance marking .78

10.2.3 Mechanical characteristics.78

10.2.4 Electrical characteristics.80

10.2.5 Telecommunications outlet requirements .86

10.2.6 Design considerations for installation .87

10.3 Optical fibre connecting hardware .88

10.3.1 General requirements .88

10.3.2 Marking and colour coding.88

10.3.3 Mechanical and optical characteristics.88
10.3.4 Telecommunications outlet requirements .89
10.3.5 Connection schemes for optical fibre cabling .89
11 Screening practices .91
11.1 General .91
11.2 Electromagnetic performance .91
11.3 Earthing .92
12 Administration .92
13 Balanced cords.92
13.1 Introduction .92
13.2 Insertion loss.92
13.3 Return loss.93
13.4 NEXT .93
Annex A (normative) Balanced permanent link and CP link performance.96
A.1 General .96
A.2 Performance.96
A.2.1 General .96
A.2.2 Return loss .97
A.2.3 Insertion loss/attenuation.98
A.2.4 NEXT .99
A.2.5 Attenuation to crosstalk ratio (ACR).102
A.2.6 ELFEXT.103
A.2.7 Direct current (d.c.) loop resistance .106
A.2.8 Direct current (d.c.) resistance unbalance.107

A.2.9 Propagation delay .107
A.2.10 Delay skew.108
Annex B (normative) Test procedures .110
B.1 General .110
B.2 Channel and link performance testing. 110
B.2.1 Testing balanced cabling channels, permanent links and CP links . 110
B.2.2 Testing optical fibre cabling channels .110
B.2.3 Channel and link test schedules . 110
B.3 Transmission testing of cords for balanced cabling. 111
B.4 Transmission testing of components for cabling.112
B.4.1 Transmission testing of copper cables for balanced cabling. 112
B.4.2 Transmission testing of connecting hardware for balanced cabling . 112
B.4.3 Transmission testing of cables for optical cabling . 112

11801 © ISO/IEC:2002+A1:2008(E) – 5 –

B.4.4 Transmission testing of connectors for optical cabling . 112

Annex C (normative)  Mechanical and environmental performance testing of

connecting hardware for balanced cabling .113

C.1 Introduction .113

C.2 Test requirements .113

C.2.1 General .113

C.2.2 Initial test measurements.113

C.2.3 Environmental and mechanical performance. 114

Annex D (informative)  Electromagnetic characteristics. 118

Annex E (informative)  Acronyms for balanced cables.119
Annex F (informative) Supported applications .121
F.1 Supported applications for balanced cabling.121
F.2 Supported applications for optical fibre cabling. 124
Annex G (informative) Channel and permanent link models for balanced cabling . 128
G.1 General .128
G.2 Insertion loss.128
G.2.1 Insertion loss of the channel configuration. 128
G.2.2 Insertion loss of the permanent link configurations . 129
G.2.3 Assumptions for insertion loss .129
G.3 NEXT .130
G.3.1 NEXT of the channel configuration . 130
G.3.2 NEXT of the permanent link configurations . 130
G.3.3 Assumptions for NEXT.131
G.4 ELFEXT.134
G.4.1 ELFEXT of the channel configuration.134
G.4.2 ELFEXT for the permanent link configurations . 134
G.4.3 Assumptions for ELFEXT.135
G.5 Return loss.135
G.5.1 Return loss of the channel and permanent link configurations. 135
G.5.2 Assumptions for the return loss circuit analysis method .136
Annex H (informative) Class F channel and permanent link with two connections . 139
Annex I (informative) Significant changes to balanced cabling requirements with
respect to earlier editions of this International Standard .140

I.1 General .140
I.2 References.140
I.3 Structural elements .140
I.4 Product designation.140
I.5 Component requirements . 140
I.6 Installed cabling requirements .141
Bibliography.147

– 6 – 11801 © ISO/IEC:2002+A1:2008(E)

Figure 1 – Structure of generic cabling .31

Figure 2 – Hierarchical structure of generic cabling.33

Figure 3 – Structures for centralised generic cabling.34

Figure 4 – Accommodation of functional elements .35

Figure 5 – Interconnect models.35

Figure 6 – Cross-connect models.35

Figure 7 – Equipment and test interfaces .36

Figure 8 – Example of a generic cabling system with combined BD and FD .38
Figure 9 – Inter-relationship of functional elements in an installation with redundancy .39
Figure 10 – Balanced cabling: channel, permanent link and CP link.42
Figure 11 – Example of a system showing the location of cabling interfaces and extent
of associated channels .43
Figure 12 – Horizontal cabling models .66
Figure 13 – Backbone cabling model .68
Figure 14 – Combined backbone/horizontal channels .71
Figure 15 – Eight-position outlet pin and pair grouping assignments (front view of
connector) .87
Figure 16 – Duplex SC connectivity configuration .90
Figure 17 – Optical fibre patch cord .91

Figure A.1 – Link options .96
Figure E.1 – Cable naming schema .119
Figure E.2 – Cable types .120
Figure G.1 – Example of computation of NEXT with higher precision . 131
Figure H.1 – Two connection channel and permanent link.139
Figure I.1 – Horizontal cabling model.142
Figure I.2 – Backbone cabling model .142

11801 © ISO/IEC:2002+A1:2008(E) – 7 –

Table 1 – Maximum channel lengths .37

Table 2 – Return loss for channel .45

Table 3 – Informative return loss values for channel at key frequencies .46

Table 4 – Insertion loss for channel .47

Table 5 – Informative insertion loss values for channel at key frequencies.47

Table 6 – NEXT for channel .48

Table 7 – Informative NEXT values for channel at key frequencies .48

Table 8 – PS NEXT for channel .49
Table 9 – Informative PS NEXT values for channel at key frequencies.50
Table 10 – Informative ACR-N values for channel at key frequencies.51
Table 11 – Informative PS ACR-N values for channel at key frequencies .51
Table 12 – ACR-F for channel.52
Table 13 – Informative ACR-F values for channel at key frequencies .53
Table 14 – PS ACR-F for channel .54
Table 15 – Informative PS ACR-F values for channel at key frequencies .54
Table 16 – Direct current (d.c.) loop resistance for channel .55
Table 17 – Propagation delay for channel .55
Table 18 – Informative propagation delay values for channel at key frequencies.56
Table 19 – Delay skew for channel .56
Table 20 – TCL for channel for unscreened systems.57
Table 21 – ELTCTL for channel for unscreened systems .57
Table 22 – Coupling attenuation for channel for screened systems .58
Table 23 – PS ANEXT for channel .59
Table 24 – Informative PS ANEXT values for channel at key frequencies .59
Table 25 – PS ANEXT for channel.60
avg
Table 26 – Informative PS ANEXT values for channel at key frequencies .61
avg
Table 27 – PS AACR-F for channel.63
Table 28 – Informative PS AACR-F values for channel at key frequencies .63
Table 29 – PS AACR-F for channel .64
avg
Table 30 – Informative PS AACR-F values for channel at key frequencies .64

avg
Table 31 – Minimum and maximum length .67
Table 32 – Horizontal link length equations.67
Table 33 – Backbone link length equations .69
Table 34 – Channel attenuation .70
Table 35 – Basic requirements of balanced cables.72
Table 36 – Mechanical characteristics of balanced cables .73
Table 37 – Optical fibre cable attenuation .75
Table 38 – Multimode optical fibre modal bandwidth .76
Table 39 – Mechanical characteristics of connecting hardware for use with balanced
cabling.79
Table 40 – Electrical characteristics of telecommunications outlets intended for use
with balanced cabling .81

– 8 – 11801 © ISO/IEC:2002+A1:2008(E)

Table 41 – Return loss.82

Table 42 – Insertion loss.82

Table 43 – Near end crosstalk (NEXT).82

Table 44 – Power sum near end crosstalk (PS NEXT) (for information only) .83

Table 45 – Far end crosstalk (FEXT) .83

Table 46 – Power sum far end crosstalk (PS FEXT) (for information only).84

Table 47 – Input to output resistance .84

Table 48 – Input to output resistance unbalance .84

Table 49 – Current carrying capacity.85
Table 50 – Propagation delay .85
Table 51 – Delay skew.85
Table 52 – Transverse conversion loss (TCL) f.f.s. .85
Table 53 – Transfer impedance (screened connectors only) .86
Table 54 – Insulation resistance .86
Table 55 – Voltage proof.86
Table 56 – Matrix of backward compatible mated modular connector performance.87
Table 57 – Mechanical and optical characteristics of optical fibre connecting hardware .89
Table 58 – Minimum return loss for balanced cords .93
Table 59 – Informative values of return loss at key frequencies for Category 5, 6 and 7
cords .93
Table 60 – Informative values of NEXT at key frequencies for Category 5, 6 and 7
cords .95
Table A.1 – Return loss for permanent link or CP link .97
Table A.2 – Informative return loss values for permanent link with maximum
implementation at key frequencies .97
Table A.3 – Insertion loss for permanent link or CP link .98
Table A.4 – Informative insertion loss values for permanent link with maximum
implementation at key frequencies .99
Table A.5 – NEXT for permanent link or CP link. 100
Table A.6 – Informative NEXT values for permanent link with maximum implementation
at key frequencies .100
Table A.7 – PS NEXT for permanent link or CP link . 101

Table A.8 – Informative PS NEXT values for permanent link with maximum
implementation at key frequencies .102
Table A.9 – Informative ACR values for permanent link with maximum implementation
at key frequencies .103
Table A.10 – Informative PS ACR values for permanent link with maximum
implementation at key frequencies .103
Table A.11 – ELFEXT for permanent link or CP link . 104
Table A.12 – Informative ELFEXT values for permanent link with maximum
implementation at key frequencies .105
Table A.13 – PS ELFEXT for permanent link or CP link .106
Table A.14 – Informative PS ELFEXT values for permanent link with maximum
implementation at key frequencies .106
Table A.15 – Direct current (d.c.) loop resistance for permanent link or CP link . 107

11801 © ISO/IEC:2002+A1:2008(E) – 9 –

Table A.16 – Informative d.c. loop resistance for permanent link with maximum

implementation .107

Table A.17 – Propagation delay for permanent link or CP link. 108

Table A.18 – Informative propagation delay values for permanent link with maximum

implementation at key frequencies .108

Table A.19 – Delay skew for permanent link or CP link .109

Table A.20 – Informative delay skew for permanent link with maximum implementation .109

Table B.1 – Cabling characteristics of copper and optical fibre cabling for acceptance,

compliance and reference testing .111

Table C.1 – Group P .114
Table C.2 – Group A .115
Table C.3 – Group B .116
Table C.4 – Group C.117
Table C.5 – Group D.117
Table F.1 – Applications using balanced cabling.122
Table F.2 – Modular connector pin assignment for applications .124
Table F.3 – Supported applications using optical fibre cabling . 125
Table F.4 – Maximum channel lengths supported by optical fibre applications for
multimode fibre .126
Table F.5 – Maximum channel length supported by optical fibre applications for single-
mode fibres.127
Table G.1 – Insertion loss deviation. .129
Table H.1 – ACR and PS ACR values for 2 connection class F channels and
permanent links at key frequencies .139
Table I.1 – Principal transmission performance requirements of 150 Ω connecting
hardware .141
Table I.2 – Minimum return loss limits for links, permanent links and channels for the
different cabling classes .143
Table I.3 – Maximum attenuation limits for links, permanent links and channels for the
different cabling classes .143
Table I.4 – Minimum NEXT limits for links, permanent links and channels for the
different cabling classes .144
Table I.5 – Minimum ACR limits for links, permanent links and channels for the
different cabling classes .144

Table I.6 – Maximum propagation delay limits for links, permanent links and channels
for the different cabling classes .145
Table I.7 – Maximum d.c. loop resistance limits for links, permanent links and channels
for the different cabling classes .145
Table I.8 – Minimum unbalance attenuation (LCL/LCTL) limits for links, permanent
links and channels for the different cabling classes.145
Table I.9 – Minimum PS NEXT, PS ACR, ELFEXT and PS ELFEXT limits for
permanent links and channels for the different cabling classes . 146
Table I.10 – Maximum delay skew limits for permanent links and channels for the
different cabling classes .146

– 10 – 11801 © ISO/IEC:2002+A1:2008(E)

INFORMATION TECHNOLOGY –
GENERIC CABLING FOR CUSTOMER PREMISES

FOREWORD
1) ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form the

specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in

the development of International Standards. Their preparation is entrusted to technical committees; any ISO and
IEC member body interested in the subject dealt with may participate in this preparatory work. International

governmental and non-governmental organizations liaising with ISO and IEC also participate in this preparation.

2) In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.
3) The formal decisions or agreements of IEC and ISO on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested IEC and ISO member bodies.
4) IEC, ISO and ISO/IEC publications have the form of recommendations for international use and are accepted
by IEC and ISO member bodies in that sense. While all reasonable efforts are made to ensure that the
technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO cannot be held responsible for
the way in which they are used or for any misinterpretation by any end user.
5) In order to promote international uniformity, IEC and ISO member bodies undertake to apply IEC, ISO and
ISO/IEC publications transparently to the maximum extent possible in their national and regional publications.
Any divergence between any ISO/IEC publication and the corresponding national or regional publication
should be clearly indicated in the latter.
6) ISO and IEC provide no marking procedure to indicate their approval and cannot be rendered responsible for
any equipment declared to be in conformity with an ISO/IEC publication.
7) All users should ensure that they have the latest edition of this publication.
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and members of their technical committees and IEC or ISO member bodies for any personal injury, property
damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees)
and expenses arising out of the publication of, use of, or reliance upon, this ISO/IEC publication or any other IEC,
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9)
...