According to the demand of 863 scientific research project, the paper discusses theV5 interface and the El circuit emulation. Also,based on the request of UAS on V5interface,the 16-line El circuit emulation is realized by using the AAL 1 function ofATM.

• 按照863科研项目的需要，本文讨论了V5接口以及E1电路仿真，并且根据实用化综合接入系统（UAS）对V5接口的要求，利用ATM的AAL1功能，实现了16路E1电路仿真。