基本光纤子系统由一个光发送机一个光接收机和光纤链路串连组成的系统它提供了上述单元之间的光学通道
The basic optical fiber subsystem is a system composed of an optical transmitter, an optical receiver and optical fiber links connected in series, which provides optical channels between the above-mentioned units
以上为机器翻译结果，长、整句建议使用 人工翻译 。