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電話光端機與PCM復用設備有一個質的區(qū)別,正規(guī)來說,PCM設備傳輸介質是2M同軸電纜,光端機傳輸介質是光纜。一、技術分析:電話光端機與PCM復用設備,都是使用標準PCM脈沖編碼調制技術,具備濾波功能,使語音通話更清晰,穩(wěn)定!都是將用戶窄帶業(yè)務統(tǒng)一接入并復用成2M信號進…
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