Multicore and symmetrical pair/quad cables for digital communications – Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz – Work area wiring – Sectional specification (Edition 3.0)
This part of IEC 61156 makes reference to IEC 61156-1. The cables described herein are intended primarily for work area wiring as defined in ISO/IEC 11801 and ISO/IEC 24702. It covers individually screened@ common screened and unscreened pairs or quads. The transmission characteristics and the frequency range (see Table 1) of the cables are specified at 20 ?? These cables can be used for various communication channels which use as many as four pairs simultaneously. In this sense@ this sectional specification provides the cable characteristics required by system developers to evaluate new systems. The cables covered by this standard are intended to operate with voltages and currents normally encountered in communication systems. These cables are not intended to be used in conjunction with low impedance sources@ for example the electric power supplies of public utility mains@ they are intended to be used to support the delivery of low voltage and power applications such as IEEE's 802.3af (Power over Ethernet) and 802.3at (Power over Ethernet Plus).