This paper Introduces the working principles of the transceiver units in HDSL transmission devices as well as the block diagram of the system. and gives an analytical account of the constituent modules of the main circuits.

• 本文介绍了HDSL传输设备中收、发器单元的工作原理与系统组成框图，并就其中的主要电路组成模块进行分析与叙述。