This paper introduces the general concept of ATM,and introduces the cell strcture and network unit in detail,such as the functions and principles of ATM-TM ATMADM. ATM-DXC. From these readers can understand the ATM communication system better.

• 本文介绍了ATM异步转移模式的一般概念，并较详细地介绍了信元的结构及网络单元设备，如ATM终端设备（TM）、ATM复用设备（ADM）、ATM跨接设备（DXC）的功能原理等，对读者了解ATM通信系统有一定的帮助。