Historical
IEC 61156-7 Ed. 1.0 b:2003
Multicore and symmetrical pair/quad cables for digital communications - Part 7: Symmetrical pair cables with transmission characteristics up to 1 200 MHz - Sectional specification for digital and analog communication cables
provides the cable characteristics required by system developers to evaluate new systems as well as to enhance present systems
International Electrotechnical Commission [iec]

