标准摘要
[中文适用范围]： IEC 61156 的这一部分描述了主要用于 ISO/IEC 11801 中定义的水平地板布线的电缆。它涵盖单独屏蔽@公共屏蔽和非屏蔽双绞线或四绞线（参见附件 A）。电缆的传输特性和频率范围（见表1）规定为20 ??这些电缆可用于同时使用多达四对的各种通信通道。从这个意义上说，本分规范提供了系统开发人员评估新系统所需的电缆特性。本标准涵盖的电缆适用于通信系统中常见的电压和电流。虽然这些电缆不适合与低阻抗源@例如@公用事业干线的电源@一起使用，但它们旨在用于支持低电压和功率应用的传输，例如 IEEE 802.3af (以太网供电）和 IEEE 802.3at（以太网供电增强版）。 [外文原描述]： IEC 61156-5:2009(E) describes the cables intended primarily for horizontal floor wiring as defined in ISO/IEC 11801. It covers individually screened, common screened and unscreened pairs or quads. The transmission characteristics and the frequency range of the cables are specified at 20 °C. Those cables are intended to be used to support the delivery of low voltage and power applications such as IEEE 802.3af (Power over Ethernet) and IEEE 802.3at (Power over Ethernet Plus). This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - new requirements for new Cat6A and Cat7A cables; - revised requirements and tests for Cat5e, Cat6 and Cat7 cables. The contents of the corrigendum of February 2010 have been included in this copy.This publication is to be read in conjunction with IEC 61156-1:2002 .
英文名称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