IEC 60876-1:20 14适用于具有以下所有一般特性的光纤交换机: -它们是无源的，因为它们不包含光电或其他转换元件； -它们具有用于传输光功率的一个或多个端口以及其中功率可以在这些端口之间路由或阻塞的两种或更多种状态； -端口是光纤或光纤连接器。第五版取消并取代了2012年出版的第四版，构成了技术修订。与上一版相比，此版本包括以下重大技术变更: -增加术语“常开”的定义； -“常关”和“串扰”； -增加新的附件E。 关键词:光纤交换机,光功率传输,光纤连接器

IEC 60876-1:2014 applies to fibre optic switches possessing all of the following general features:
- they are passive in that they contain no optoelectronic or other transducing elements;
- they have one or more ports for the transmission of optical power and two or more states in which power may be routed or blocked between these ports;
- the ports are optical fibres or fibre optic connectors. This fifth edition cancels and replaces the fourth edition that was published in 2012 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of definitions for the terms for "normally-on;
- "normally-off" and "crosstalk";
- addition of a new Annex E. Keywords: fibre optic switches, transmission of optical power, fibre optic connectors