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介绍了一种全光传输系统的监控技术。监控信息由主信道之外的光波承载，在由传输光纤、端站和光放大器构成的环路中，以帧的方式进行传递，实现了整个系统工作状态的监视和控制。
An all-optical transmission system monitoring technology is introduced. The monitoring information is carried by the light waves outside the main channel, and transmitted in the frame by the transmission optical fiber, the end station and the optical amplifier, which realizes the monitoring and control of the working status of the whole system.