This paper gives an account of the implications,a standard system ,and the scope of application, of the HDSL technology4 aiming to help readers acquire a fundamental understanding of this new technology.

• 本文就HDSL技术的内涵，HDSL标准体系，应用范围及HDSL设备系统设计涉及的关键技术作了叙述，目的在于使大家对这一新技术有一个初步的了解。