标准摘要
[中文适用范围]： 覆盖单独未屏蔽的 20 对/10 个四边形或更多垂直井道或垂直楼层之间的情况。当垂直安装时，额外长度要求可能适用，并在适当的规范中定义。电缆可以在电缆芯上设置有公共屏蔽。这些电缆适用于各种通信系统，在相应的详细规范中给出了参考。 [外文原描述]： Covers individually unscreened 20 pairs/10 quads or more for vertical shafts or vertically between floors. When installed vertically extra length requirements may be applicable and are defined in the appropriate specifications. The cables may be provided with a common screen over the cable core. These cables are suitable for the various communication systems for which the reference is given in the appropriate detail specification.
英文名称Multicore and symmetrical pair/quad cables for digital communications - Part 4: Riser cables - Sectional specification