光信号转发单元，是光传送网设备OADM和OXC的重要组成部分。

Optical Transmission unit, which is an important sub-function unit of OADM device and OXC device.

youdao

光信号转发单元，是光传送网设备OADM和OXC的重要组成部分。

Optical Transmission unit, which is an important sub-function unit of OADM device and OXC device.

youdao