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汉语拼音：shù zì chéng kòng jiāo huàn

用预编程序控制交换接续的市内和长途电话交换机。利用了计算机技术，接续快，体积、功耗、噪音小，维护方便，且灵活性强，只要变换或增加相应程序，就可实现交换性能的变更，如呼叫转移、自动回叫、三方会议等。

• Chapter 3 refers the interface circuit and switching network of digital program control exchange.

  第三章涉及数字程控交换机的接口和交换网络；

• Our company has sold more than 500 sets of digital PBX system, mail box and other telecom equipments in Shanghai and neighboring areas.

  本公司已在上海及邻近地区销售了500多套数字程控交换机、语音系统及其他通讯设备。

• 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

• Design and Realization of the Small Digital Program Controlled Exchange

  小型数字程控交换机的设计与实现

• The Reliability Research of Digital Programmed Control Exchange Processor

  数字程控交换处理机可靠性研究

• The Realization and Analysis of Digital Program Control Exchange Experimental System

  一种数字程控交换实验系统的实现与分析

• Code 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

• Principles of Program Controlled Digital Switching System

  数字程控交换原理

• Wideband digital programmed switches (ATM)

  宽带数字程控交换机（异步转移模式宽带交换机ATM）