... 线路信号 line signal 线路信号单元 line signal element 线路信号发送连接器 line signal sender connector ...
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由于不同的光网络单元onu与光线路终端olt的距离不同，实际工作时到达接收端的信号的幅度，相位都相差很大。
Because the distances from different ONUs to OLT are different, the amplitudes and phases of the different signals will have significant difference when receiving the receive terminal.
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