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                光端机的E1信号,是由欧洲30路脉码所调制PCM,E1是它的简称,其速率为2.048比特每秒(Mbit/s)。每一个E1的时分复用帧一共划分为32个时隙,每个均等,每个时分复用帧的长度是T=125us,时隙编号分别由CH0到CH31。其中CH0的时隙用作帧同步,…
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