1.
"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)，
2.
Typically, permanent virtual circuits are set up between multiple backbone switches and between switches and devices with heavy network traffic.
一般而言，永久性虚拟电路建在多个主干网交换机之间和交换机与网络信息流量大的设备之间。
3.
Device used to prevent excessive voltages and/or currents on a line from damaging exchange equipment or subscribers' apparatus.
在线路上用来防止过电压或过电流损坏交换设备或用户设备的装置。
4.
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
5.
AC/DC and DC/AC Converty Circuits in Power Supply Equipment;
电源设备中AC/DC和DC/AC变换电路
6.
An IP telephony software switch is designed to replace and/or augment any telecommunications device that uses circuit-based technology.
设计IP电话软件交换机是用来替代和/或增强那些基于电路技术的电信设备。
7.
Application and Research of Heat-exchange System in Electronic Equipments Thermal Design;
热交换系统在电子设备热设计中的应用研究
8.
The Design of Hot Standby and the Implementation of Link Aggregation of Ethernet Switch;
以太网交换机热备份的设计与链路汇聚的实现
9.
gentex exchange
公众电报电路交换局
10.
In this case, a call is placed by the fax device and routed to the local central office by the PBX.
在此案例中，传真设备要了一个呼叫，并通过小交换机路由到了本地电话局。
11.
The number of telephone lines connecting the subscriber's terminal equipment to the public switched network and which have a dedicated port in the telephone exchange equipment.
连接用户终端设备和公用交换网并具有一个电话交换设备专用端口的电话线数。
12.
An Integrated Services Digital Network device on a public switched telephone network.
公用交换电话网上的综合业务数字网设备。
13.
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
14.
moving-bed ion-exchange equipment
移动床离子交换设备
15.
container equipment data exchange
集装箱设备数字交换
16.
automatic cation exchange unit
自动阳离子交换设备
17.
time multiplex telephone exchange
时分多路电话交换机
18.
railway telephone exchange
铁路专用电话交换机