数字用户线的应用和发展

Application and development of digital subscriber lines

本文首先解释对绞铜线用作数字用户线的可能性，接着介绍各种不同应用的数字用户线，最后展望了正在发展中的甚高速率数字用户线。

The paper begins with explaining the possibility of using the twisted pair copper wire for the digital subscriber line (DSL). Then, it describes the application of various kinds of xDSL. Finally,the paper introduces the technology used for very high speed digital subscriber line (VDSL) under development.