高宽带接入技术-ADSL

High Broadband Access Technology-ADSL

ＡＤＳＬ又称非对称数字用户线路，是在当今飞速发展的网络时代背景下，用户接入网由普通电话回路向光纤用户网过渡时期提出的一种新的宽带接入技术。它在不改变现有用户电话回路的同时，采用非对称的调制解调技术，实现了Ｉｎｔｅｒｎｅｔ的高速接入，使网上的多媒体服务真正成为可能．文章详细介绍了这一技术的现状、特点、工作原理，并将它与几种传统上网方式进行了比较。

ADSL, which means Asymmetric Digital Subscriber Line, is a new broadband access technology proposed today while the user access network is to transform from the local telephone loop to the fiber network under the background of high developing internet technology. Without changing the current local telephone loop, ADSL introduces asymmetric modulation and demodulation technologies to implement the high access to the Intcrnet and makes the multimedia services come true. This articles presents the status quo, the characteristics and the principles of this technology and compares it with other traditional access methods.