ADSL宽带接入网基本原理及其关键技术

宽带接入网技术中ADSL（不对称数字用户环路）和HFC(光纤同轴混合网)是最具有竞争力的两种。ADSL技术能使用现有的市话铜线进行信号传输，这篇文章分析了ADSL的技术功能及其使用的调制技术。

(In the broadband access network technology, ADSL (asymmetric digital subscriber loop) and HFC (fiber coaxial hybrid network) are the two most competitive. ADSL technology can use the existing local copper wire for signal transmission. This article analyzes the technical function of ADSL and the modulation technology it uses.)

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