IEC 61156-5 Revised
IEC 61156-5:2009/COR2:2010
Corrigendum 2 - Multicore and symmetrical pair/quad cables for digital communications - Part 5: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz - Horizontal floor wiring - Sectional specification
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A more recent version of this publication exists:
IEC 61156-5:2020 RLV