ISO/IEC 11801-1:2017/AMD1:2025
(Amendment)Amendment 1 - Information technology - Generic cabling for customer premises - Part 1: General requirements
Amendment 1 - Information technology - Generic cabling for customer premises - Part 1: General requirements
Amendement 1 -
General Information
Relations
Standards Content (Sample)
ISO/IEC 11801-1
Edition 1.0 2025-11
INTERNATIONAL
STANDARD
AMENDMENT 1
Information technology - Generic cabling for customer premises -
Part 1: General requirements
ICS 35.200 ISBN 978-2-8327- 0856-9
ISO/IEC 11801-1:2017-11/AMD1:2025-11(en)
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Information technology -
Generic cabling for customer premises -
Part 1: General requirements
AMENDMENT 1
FOREWORD
1) ISO (the International Organization for Standardization) and IEC (the 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 through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental,
in liaison with ISO and IEC, also take part in the work.
2) 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 National bodies.
3) IEC and ISO documents have the form of recommendations for international use and are accepted by IEC and
ISO National bodies in that sense. While all reasonable efforts are made to ensure that the technical content of
IEC and ISO documents is accurate, IEC and ISO cannot be held responsible for the way in which they are used
or for any misinterpretation by any end user.
4) In order to promote international uniformity, IEC and ISO National bodies undertake to apply IEC and
ISO documents transparently to the maximum extent possible in their national and regional publications. Any
divergence between any IEC and ISO document and the corresponding national or regional publication shall be
clearly indicated in the latter.
5) IEC and ISO do not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC and ISO marks of conformity. IEC and ISO are not
responsible for any services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this document.
7) No liability shall attach to IEC and ISO or their directors, employees, servants or agents including individual
experts and members of its technical committees and IEC and ISO National 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, use of, or reliance upon, this ISO/IEC document or any
other IEC and ISO documents.
8) Attention is drawn to the Normative references cited in this document. Use of the referenced publications is
indispensable for the correct application of this document.
9) IEC and ISO draw attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC and ISO take no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, IEC and ISO had not received notice of
(a) patent(s), which may be required to implement this document. However, implementers are cautioned that this
may not represent the latest information, which may be obtained from the patent database available at
https://patents.iec.ch and www.iso.org/patents. IEC and ISO shall not be held responsible for identifying any or
all such patent rights.
Amendment 1 to ISO/IEC 11801-1:2017 has been prepared by subcommittee 25:
Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
Information technology.
The text of this Amendment is based on the following documents:
Draft Report on voting
JTC1-SC25/3285/CDV JTC1-SC25/3337A/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1, and the ISO/IEC Directives, JTC 1 Supplement
available at www.iec.ch/members_experts/refdocs and www.iso.org/directives.
INTRODUCTION TO THE AMENDMENT
This document specifies single pair component Categories T1-A, T1-B, and T1-C, as well as
cabling channels and link Classes T1-A, T1-B, and T1-C to support single pair applications.
Balanced single pair channels and links specified in this document are not a replacement for
the generic 4-pair channels in ISO/IEC 11801-1:2017. They are an additional media type
intended for use in intelligent building and industrial automation devices (e.g. in network
sensors, actuators, and controllers). Because of the different types and locations of these
devices, single pair cabling will have distinct structures and distribution architectures that are
detailed in other parts of the ISO/IEC 11801 series.
This document also provides modifications and corrections to ISO/IEC 11801-1:2017.
INTRODUCTION
Replace the existing Figure 1 with the following new figure:
Figure 1 – Relationships between the generic cabling documents
produced by ISO/IEC JTC 1/SC 25
1 Scope
Replace existing bullet b) with the following:
b) channel transmission, environmental and power delivery performance requirements;
2 Normative references
Add the following normative references at the end of the list:
IEC 60512-99-002, Connectors for electrical and electronic equipment - Tests and
measurements - Part 99-002: Endurance test schedules - Test 99b: Test schedule for unmating
under electrical load
IEC 61156-11, Multicore and symmetrical pair/quad cables for digital communications - Part 11:
Symmetrical single pair cables with transmission characteristics up to 1,25 GHz - Horizontal
floor wiring - Sectional specification
IEC 61156-12, Multicore and symmetrical pair/quad cables for digital communications - Part 12:
Symmetrical single pair cables with transmission characteristics up to 1,25 GHz - Work area
wiring - Sectional specification
IEC 61156-13, Multicore and symmetrical pair/quad cables for digital communications - Part 13:
Symmetrical single pair cables with transmission characteristics up to 20 MHz - Horizontal floor
wiring - Sectional specification
IEC 61156-14, Multicore and symmetrical pair/quad cables for digital communications - Part 14:
Symmetrical single pair cables with transmission characteristics up to 20 MHz - Work area
wiring - Sectional specification
IEC 61196-1-105, Coaxial communication cables - Part 1-105: Electrical test methods - Test for
withstand voltage of cable dielectric
IEC 61935-4, Specification for the testing of balanced and coaxial information technology
cabling - Part 4: Installed balanced single-pair cabling as specified in ISO/IEC 11801-1 and
related standards
IEC 63171, Connectors for electrical and electronic equipment - Shielded or unshielded free
and fixed connectors for balanced single-pair data transmission with current-carrying capacity -
General requirements and tests
IEC 63171-1, Connectors for electronic equipment - Part 1: Detail specification for two-way,
shielded or unshielded, free and fixed connectors - Mechanical mating information, pin
assignment and additional requirements for Type 1 copper LC style
IEC 63171-6, Connectors for electrical and electronic equipment - Part 6: Detail specification
for 2-way and 4-way (data/power), shielded, free and fixed connectors for power and data
transmission with frequencies up to 600 MHz
ISO/IEC TS 29125, Telecommunications cabling requirements for remote powering of terminal
equipment
___________
First edition under preparation. Stage at the time of publication: IEC CDV 61935-4:2025.
3.2 Abbreviations
Add the following new abbreviations at the end of the list:
PON passive optical network
S-PoE single pair Power over Ethernet
SP single pair
SPE single pair Ethernet
5.3.1 Cabling subsystem 1
Replace the last paragraph with the following paragraph:
Although terminal equipment cords and equipment cords are used to connect terminal and
transmission equipment respectively to the cabling subsystem, they are not considered part of
the cabling subsystem because they can be application specific.
6 Channel performance requirements
6.3.3.4.1 General
Delete the existing second paragraph.
6.3.3.6 Direct current loop resistance
Replace the existing Table 17 with the following new Table 17:
Table 17 – DC loop resistance for a channel
a
DC loop resistance
b b
Class
Maximum DC loop resistance at 60 °C Informative DC loop resistance at 20 °C
Ω Ω
A 560 472
B 170 143,3
C 40 33,7
c e
D, E, E , F, F
25 21,1
A A
BCT-B-L 4,0 3,4
BCT-B-M 6,9 5,8
d f
I, II
6,4 5,4
a
This requirement is based on channels designed for the MICE C1 environmental classification.
b
The requirements at 20 °C and 60 °C are equivalent according to the generic formula for temperature
correction of resistance. To correct DC loop resistance to a different temperature, the conversion is as follows:
( )
R R [1+ α T− T ]
ref ref
where
R is conductor resistance at temperature T in Ω;
R is conductor resistance at reference temperature T , usually 20 °C, in Ω;
ref ref
α is temperature coefficient of resistance for the conductor material (copper = 0,003 93) per °C;
T is conductor temperature in °C;
T is reference temperature that α is specified at for the conductor material in °C.
ref
c
The maximum DC loop resistance at 60 °C of each pair of a cable (excluding connections) within a 2-connector
link used in a channel shall be 0,22 Ω/m. This shall be achieved by an appropriate design.
d
The maximum DC loop resistance at 60 °C of each pair of a cable (excluding connections) within a 2-connector
link used in a channel shall be 0,16 Ω/m. This shall be achieved by an appropriate design.
e
The maximum DC loop resistance at 20 °C of each pair of a cable (excluding connections) within a 2-connector
link used in a channel shall be 0,19 Ω/m. This shall be achieved by an appropriate design.
f
The maximum DC loop resistance at 20 °C of each pair of a cable (excluding connections) within a 2-connector
link used in a channel shall be 0,14 Ω/m. This shall be achieved by an appropriate design.
6.3.3.12.2 Unbalance attenuation, near-end
Replace the existing Table 22 with the following new Table 22:
Table 22 – Informative TCL values for unscreened channels at key frequencies
Minimum TCL
dB
Frequency Class
MHz A B C D E, E
A
E , E , E E , E , E E , E , E E E E E E E
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
0,1 30,0 40,0 – – – – – – –
1 – 20,0 30,0 40,0 40,0 40,0 40,0 40,0 40,0
16 – – 24,0 34,9 40,0 40,0 34,9 40,0 40,0
30 – – – 30,8 40,0 40,0 30,8 40,0 40,0
100 – – – 20,3 30,3 40,0 20,3 30,3 40,0
250 – – – – – – 12,3 22,3 32,3
NOTE E , E and E relate to the MICE environmental classification.
1 2 3
6.3.3.12.4 Coupling attenuation
Add the following sentence after the first sentence of the second paragraph:
The coupling attenuation of each pair of a channel, with maximum implementation, at key
frequencies is given in Table 145 for information only.
=
Add the following new table below the existing Table 29:
Table 145 – Informative coupling attenuation values
for a screened channel at key frequencies
Minimum coupling
...
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