Subscriber line interface circuit is an important part of digital program-controlled switching system.
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。
The memory control block (MCB) shown in Fig. 1 is widely used in digital program-controlled switching systems, telecommunication equipments and other automatic control equipments.
图1所示的存储控制模块MCB在数字程控交换机等通信设备和自动控制设备中得到大量应用。
Postal and telecommunications to achieve the program-controlled exchange, digital transmission will take the lead in the province completed the first telephone counties.
邮电通讯实现了交换程控化，传输数字化，并率先在全省建成了第一个电话县。
The telephone network based on circuit-switching and digital program controlled exchanging technology plays an important role in the whole communicating networks.
以电路交换和数字程控交换技术为基础的电话网更是在整个通信网中占据着重要的地位。
This paper introduces hardware constitution and software design of digital clock controlled by 8031 single-chip microcomputer, and its assembly language program is given.
介绍了用8031单片机控制的电脑数字钟的硬件结构与软件设计，给出了汇编语言源程序。
In electric power system, Digital Program Controlled Exchange has been used broadly because communications requests high reliability.
在电力系统中，由于对通信的可靠性要求较高，因此程控数字交换机正在得到广泛的应用。
The telecommunications are more advanced with the program-controlled exchange and digital transmission.
通讯上实现了交换程控化、传输数字化。
The paper analyzes the major reasons of overvoltage and overcurrent occuring to program-controlled digital users exchanger, and discusses the protection methods against overvoltage and overcurrent.
本文分析了程控数字用户交换机过压过流产生的主要原因，并讨论了过压过流的保护方法。
The paper analyzes the major reasons of overvoltage and overcurrent occuring to program-controlled digital users exchanger, and discusses the protection methods against overvoltage and overcurrent.
本文分析了程控数字用户交换机过压过流产生的主要原因，并讨论了过压过流的保护方法。
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