网络控制的概念被扩展到了让数字交换机与数据库（称为服务控制点）和信号处理系统（智能外设）通信。

The concept of network control was extended to let digital switches communicate with databases (known as Service Control Points) and signal processing systems (Intelligent Peripherals).

youdao

在电信中心办公室和交换中心安装工机电，模拟和数字集群系统，电路和设备。

Install electromechanical, analog and digital trunking systems, circuits and equipment in telecommunications central offices and switching centres.

youdao

本文研究的即为适用于电力部门的小型数字程控交换系统。

The small digital programmable exchange system studied in this paper is suitable for electric department.

youdao