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 61156-12:2025 specifies cables intended to be used for single balanced pair cabling for office, home, and industrial applications described in ISO/IEC 11801-1:2017 and ISO/IEC 11801:2017/AMD1. An example of existing application is 1000BASE-T1, see ISO/IEC TR 11801 9906.
The transmission characteristics of these cables are specified up to a frequency of 1.25 GHz and at a temperature of 20 °C. The T1-B type cable is specified from 0.1 MHz to 600 MHz, the T1-C type cable from 0.1 MHz to 1.25 GHz. Depending on the MICE environment and the installation conditions, either unscreened or screened cables can be used. A blank detail specification can be found in Annex A.
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:
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