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电话光端机与PCM复用设备的技术分析与区别
电话光端机与PCM复用设备有一个质的区别，正规来说，PCM设备传输介质是2M同轴电缆，光端机传输介质是光缆。一、技术分析：电话光端机与PCM复用设备，都是使用标准PCM脉冲编码调制技术，具备滤波功能，使语音通话更清晰，稳定！都是将用户窄带业务统一接入并复用成2M信号进…
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