模拟用户线接口电路是数字程控交换系统的重要组成部分。
Subscriber line interface circuit is an important part of digital program-controlled switching system.
STA5型用户板用于数字程控交换机的用户接口，也可做为各类接入网系统的远端二线模拟接口。
STA5 subscriber line is applied to subscriber line interface of programmed control digital switches, and two wire analogy remote interface of access network.
模拟用户的拉丝工艺条件，对中心缩孔方坯轧制的ER70S - 6焊丝用高线盘条进行拉拔试验。
To simulate wire drawing process conditions of consumers, the ER70S-6 high speed wire rod for welding wire, which is rolled with shrinkage void square billet at center, is drawn.
应用推荐