WG 3 - ISO/IEC JTC 1/SC 25/WG 3

ISO/IEC TS 11801-9903:2025 establishes modelling of limits for mixed-mode transmission parameters within and between two pairs of balanced cabling. This document consists of a detailed description of matrix modelling and gives explanations on how to convert matrices, by using the S to T and T to S matrix conversion. Further it consists of terms and definitions used, how specific parameters are modelled, alternative calculation and signal-to-noise ratio (SNR) modelling.
Chain parameters and alternative approaches and formulas are described for combining component cable and connector transmission parameters into cabling link and channel transmission parameters. S-parameter limit matrix formulas are covered, which can be transformed into T-parameter limit matrices for use in chain parameter link and channel limit formulas. The formulas are applicable to all transmission parameters for forming complete differential-mode, mixed-mode, and common-mode link and channel models.
Terms and definitions used for modelling are discussed, together with how modelling is done for specific transmission parameters. Alternative calculation models are explained, and the SNR modelling introduced.
This second edition cancels and replaces the first edition published in 2021. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the expansion of the list of specified parameters to include mixed-mode mode-conversion and related unbalance attenuation parameters;
b) the addition of an informative annex covering the topic of signal-to-noise ratio and its relation to the S-parameter matrix channel model.

ISO/IEC TR 11801-9906:2025 covers cabling channel specifications, for cabling channels constructed from balanced single-pair cabling components, primarily intended for use in industrial automation and process control applications.
The cabling channel specifications are intended to support ISO/IEC/IEEE 8802-3 single-pair Ethernet (SPE) link segment specifications in the following SPE physical layer specifications (PHYs):
a) 1000BASE T1 Type B (bp), with reach up to 40 m;
b) 1000BASE T1 Type A (bp), with reach up to 15 m;
c) 100BASE T1L (dg), with reach up to 500 m;
d) 100BASE T1 (bw), with reach up to 15 m;
e) 10BASE T1L (cg), with reach up to 1000 m;
f) 10BASE T1S (cg), with reach up to 15 m.
The channel component specifications are referenced according to corresponding IEC balanced single-pair cable and connector specifications.
Channel specifications include IL, RL, TCL, coupling attenuation, and alien crosstalk parameters specifications.
Channel EMC related specifications include electromagnetic isolation levels E1, E2 and E3, which are defined according to the MICE standard environmental characterization system specified in ISO/IEC 11801-1.
ISO/IEC TR 11801-9906:2025 cancels and replaces the first edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the addition of ISO/IEC/IEEE 8802-3, 100BASE T1L (dg), long reach;
b) complete rearrangement of the information contained in Clause 4, Clause 5, Annex A, Annex B, and Annex C.

ISO/IEC TR 11801-9911:2024, which is a Technical Report,
a) describes the rules of implementation of balanced single pair as described by ISO/IEC 11801-6:2017/AMD1:202x within a balanced 4- pair cabling system with a current carrying capacity of 0,75 A per conductor;
b) describes the use of components and cabling to implement and configure according to ISO/IEC 11801-6:2017/AMD1:202x
c) describes links and components for generic single pair channels according to ISO/IEC 11801-1:2017/AMD1:202x. Particular areas of interest are:
• remote powering according to IEEE Std 802.3, Clause 104
• loop resistance, max. current
• insertion loss
• return loss
• noise considerations
• frequency range requirements (low and high)
• length calculation of the SCP-Link-4-pair-cable
• number of channels
d) describes the use of application specific single pair channels in addition to ISO/IEC 11801:2017/AMD1:202x, 6.6.4
e) describes guidance on single pair remote powering applications when using 4-pair cabling with current carrying capacity specified
f) describes guidelines for planning, administration and installation

ISO/IEC TS 29125:2017(E) This document specifies the use of generic balanced cabling for customer premises, as specified in the ISO/IEC 11801 series, for remote powering of terminal equipment. It provides guidance on new cabling installations and renovations. The customer premises may encompass one of more buildings or may be within a building that contains more than one organization. The cabling may be installed prior to the seelction of remote powering equipment or powered terminal equipment.

ISO/IEC 14763-3:2024 specifies systems and methods for the inspection and testing of installed optical fibre cabling designed in accordance with premises cabling standards including the ISO/IEC 11801 series. The test methods refer to existing standards-based procedures where they exist.
This third edition cancels and replaces the second edition published in 2014 and Amendment 1:2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) removal of plastic fibre testing;
b) addition of testing of MPO cabling;
c) restructuring of the content;
d) addition of end-to-end link LSPM testing;
e) addition of MPTL LSPM testing;
f) addition of measurement uncertainty for all measurement methods;
g) introduction of normative inspection for cleanliness to align with the ISO/IEC 11801 series;
h) testing will support SM ranges up to 10 km;
i) introduction of new test limits for connector attenuation against reference connector;
j) introduction of description of reference connectors;
k) introduction of recommended cleaning methods.

ISO/IEC 14763-4:2021 (E) specifies the measurement of two- and four-pair balanced cabling of
a) end-to-end (E2E) link Class D, E and EA;
b) modular plug terminated links (MPTLs) of Class D, E, EA, F, FA and of Class I and II;
c) direct attach cabling of Class D, E, EA, F, FA and of Class I and II.
The free connectors which terminate two and four pairs in field and laboratory conditions are included. This second edition cancels and replaces the first edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- measurement of the transmission performance of modular plug terminated link (MPTL) and direct attach cabling were added.
- Additional requirements of test head designs of E2E link were introduced.
The contents of the corrigendum 1 (2022-09) have been included in this copy.

ISO/IEC 11801-9903:2021 establishes a matrix-model for formulating limits for mixed mode parameters within and between two pairs of balanced cabling. This is for the purpose of supporting new, improved balanced cabling channel and link specifications.

ISO/IEC TR 11801-9906:2020(E) covers channel specifications, for channels constructed from balanced 1 pair cabling components, primarily intended for use in industrial automation and process control applications. The channel specifications are consistent with corresponding IEEE 802.3 single-pair Ethernet (SPE) applications and are referenced from link segment specifications in the following IEEE SPE physical layer specifications: • ISO/IEC/IEEE 8802-3:2017/AMD4, 1 000 Mb/s: 1000BASE T1 Type A, ≤ 15 m, 1000BASE T1 Type B, ≤ 40 m; • ISO/IEC/IEEE 8802-3:2017/AMD1, 100 Mb/s: 100BASE T1, ≤ 15 m; • IEEE 802.3cg, 10 Mb/s: 10BASE T1S, ≤ 15 m; 10BASE T1L, ≤ 1 000 m. The channel component specifications are referenced according to corresponding IEC balanced 1 pair cable and connector specifications. Channel specifications include IL, RL, TCL, coupling attenuation, and alien crosstalk parameters specifications. Channel EMC related specifications include electromagnetic isolation levels E1, E2 and E3, which are defined according to the MICE standard environmental characterization system specified in ISO/IEC 11801-1

ISO/IEC 14763-2:2019 specifies requirements for the planning, installation and operation of telecommunications cabling and cabling infrastructures including cabling, pathways, spaces and telecommunications bonds (other than that specified in ISO/IEC 30129) in support of generic cabling standards and associated documents. The following aspects are addressed: a) specification of the installation; b) quality assurance; c) installation planning; d) installation practice; e) documentation; f) administration; g) testing; h) inspection; i) operation; j) maintenance; k) repair. The requirements and recommendations of Clauses 5 to 14 are premises-independent. Annexes C through G contain premises-specific amendments of and additions to these requirements and recommendations. In addition, this document describes the methodology for the assessment of spaces, pathways, pathway systems and cabling (either installed or planned) in support of remote powering objectives. This document excludes specific requirements applicable to other cabling systems (e.g. power supply cabling); however, it takes account of the effects other cabling systems may have on the installation of telecommunications cabling (and vice versa) and gives general advice. This document excludes those aspects of installation associated with the transmission of signals in free space between transmitters, receivers or their associated antenna systems (e.g. wireless, radio, microwave or satellite). This document is applicable to certain hazardous environments but does not exclude additional requirements which are applicable in particular circumstances (e.g. electricity supply and electrified railways). Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this document and are covered by other standards and regulations. However, information given in this document can be of assistance in meeting these standards and regulations. This second edition includes the following significant technical changes with respect to the previous edition: the inclusion of planning and installation practices to support remote powering over the telecommunications cabling infrastructure and the inclusion of planning and installation practices outside buildings.

ISO/IEC 14763-4:2018(E) specifies the measurement at frequencies of end-to-end links of two- and four-pair balanced cabling of 100 MHz of Class D and 250 MHz of Class E including free connectors which terminate two and four pairs in both field and laboratory conditions.

This Technical Report provides guidance to determine whether and which installed channels will support 25GBASE-T. It also provides mitigation procedures to improve the performance of installed channels to the point where the 25GBASE-T application is supported. Additionally, it recommends the use of Class I and Class II channels to support 25GBASE-T in new installations.

ISO/IEC 11801-6:2017(E) This part of ISO/IEC 11801 specifies generic cabling within premises that comprise single or multiple buildings on a campus. It covers balanced cabling and optical fibre cabling. The contents of the corrigendum of April 2018 have been included in this copy.

ISO/IEC TR 11801-9903:2015(E) establishes a matrix-model for formulating limits for differential mode parameters for return loss, insertion loss, and near and far end crosstalk, within and between two pairs of balanced cabling. This is for the purpose of supporting new, improved balanced cabling channel and link specifications, which are expected to be included in the next edition of ISO/IEC 11801.