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一、DSL的主要技术特点DSL是英文“Digital Subscriber Line”的简称,中文意义为数字用户线,是一种基于普通电话线的宽带接入技术。它将数据信号和电话音频信号以频分复用原理调制于各自频段互不干扰,可以在一对铜双绞线上同时传送两种信号,保证正常语音服务质量的同时,还可以支持众多宽带网络应用。在现有电话线上安装ADSL,只需在普通电话用户端安装一台专用终端设备,无须为宽带上网而改造用户原有电话线路,从而充分利用
First, the main technical characteristics of DSL DSL is short for English “Digital Subscriber Line”, the Chinese meaning of digital subscriber line, is based on a common telephone line broadband access technology. It will data signals and telephone audio signal to frequency division multiplexing principle modulation in their respective bands do not interfere with each other, in a pair of copper twisted pair at the same time to send two signals to ensure normal voice service quality, but also can support many broadband Internet application. ADSL installed in the existing telephone line, simply install a dedicated terminal equipment in the ordinary telephone user, without the need for broadband Internet access and transform the user’s existing telephone lines, so as to make full use of