Combined Local and Tandem Exchange

concourse-connection longitudinal-transverse auto-telephone exchange

汇接用纵横制自动电话交换机

crossbar automatic telephone system

纵横制自动电话交换机

crossbar private automatic branch exchange system

纵横制自动电话小交换机

Relays for crossbar telephone switching systems

GB/T3972-1992纵横制电话交换机用继电器

crossbar automatic exchange system

纵横制自动交换方式

"Present-day telephone-circuit switching equipment is based on either electromechanical techniques (employing crossbar, Strowger, or rotary switches)"

目前，电话的电路交换设备或以机电技术(采用纵横制、步进制或旋转式接线器)，

machine driven switching system

机动制自动电话交换机

Technical requirements and testing methods for crossbar private automatic branch exchange

GB/T5322-1985纵横制用户电话交换机技术要求和试验方法

private automatic telephone exchange

专用自动电话交换机

step-by-step system local automatic telephone exchange

步进制市内用自动电话交换机

selecting chain

(纵横制交换机中的)互斥电路

Technical requirements and testing methods for local crossbar telephone switching systems

GB/T6878-1986纵横制市内电话交换机技术要求和试验方法

A private telephone exchange that automatically connects internal "branch" lines to the external circuits of a telephone system.

一种自动地将内部用户线连接到电话系统外线的专用电话交换机。

computer telephone exchange

电脑自动电话交换机

all relay automatic telephone system

全继电器制自动电话交换机

automatic local exchange

市内电话自动交换机

automatic toll switching system

长途电话自动交换机

unit automatic exchange

内部自动电话交换机