Fibre optic communication subsystem basic test procedures - Part 4-2: Fibre optic cable plant - Single-mode fibre optic cable plant attenuation (IEC 61280-4-2:1999); German version EN 61280-4-2:1999
光纤通信子系统基本试验程序第4-2部分:光纤电缆设备单模光纤电缆设备衰减(IEC 61280-4-2-1999);德文版EN 61280-4-2:1999