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介绍在普通的双绞铜线对用户线路上实现宽带多媒体信息传输的新技术──ADSL技术．文中着重介绍这种非对称数字用户线（ADSL）的信道特性、传输技术和多媒体通信系统结构．这种ADSL技术使数字视频和多媒体信息进入千家万户和中小企业成为可能，也为用户线由铜线过渡到FTTC或FTTH奠定了基础。
Describes the ADSL technology, a new technology to realize broadband multimedia information transmission on subscriber line in ordinary twisted pair copper wire. This article focuses on the channel characteristics of this asymmetric digital subscriber line (ADSL), transmission technology and multimedia communication system architecture. This ADSL technology makes it possible for digital video and multimedia information to reach millions of households and small and medium-sized businesses, laying the foundation for subscriber lines to transition from copper to FTTC or FTTH.