digital telephone switching

New generation speech CODEC for digital telephone switching;

新一代数字程控交换机话音编解码电路

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。

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。

Multimedia Communications in Digital SPC Exchanges and Private Networks

数字程控交换机与专网中的多媒体通信

Design of the Small Digital Program Controlled Exchange Used in Electric Power Communication;

电力通信用小型数字程控交换机的设计

Research and Realization of Shipborne Digital Programme-controlled Telephone Switching Board Based on the CAN Bus

基于CAN总线船用数字程控交换机的实现研究

SPC digital toll exchange

程控数字长途电话交换机

Technical requirements of digital SPC automatic telephone exchange

GB/T15542-1993数字程控自动电话交换机技术要求

Realization of Call Restricting of S1240 SPC Digital Exchanger

S1240程控数字交换机呼叫限制功能的实现

Regulation for construction of railway SPC digital telephone switching engineering

铁路数字程控交换通信工程施工规范

Technical code for SPC digital telephone switching engineering design of railway

铁路时分数字程控交换设备技术规范

SPC exchanges have accounted for 99.8% of the country central office telephone exchanges and 99.6% of long distance transmission has been digitized.

全国局用交换机程控化比重达到99.8%，长途传输数字化比重达到99.6%；

Generic specification for stored program control digital private automatic branch telephone exchange system

GB/T14381-1993程控数字用户自动电话交换机通用技术条件

Code for design of railway SPC digital switching engineering

铁路时分数字程控电话交换工程设计规范

Standard for quality inspection and assessment of railway digital telephone switching engineering

铁路数字程控交换通信工程质量评定验收标准

Exploration of Basic Architectures of the Course in "Program Control Digital Switch Technology";

探索“程控数字交换技术”课程的基本结构

microcomputer controlled digitizing robot

微机控制数字变换机扑

digital computer switching center

数字计算机交换中心

digital cellular switch (DCS), and

数字蜂窝交换机 (DCS)，和

SPC telex exchange

程控用户电报交换机

The ZXJ10 data maintenance program- controlled switchboards and the failure to deal with common

ZXJ10程控交换机的数据维护及常见故障处理