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- A. B. Strowger invents the telephone switch, dial telephone. 史端乔发明自动电话交换系统。
- Western panel type automatic telephone switch board 西部板式自动电话交换机
- crossbar type automatic telephone switch board 纵横制自动电话交换机
- If not,the call went to the company's in-house telephone switching system,or PBX (private branch exchange). 如果没有，电话就转到公司内的电话交换系统（即PBX，用户电话交换机）。
- SSPs are telephone switches,interconnected by SS7 links,that originate,terminate or tandem calls. SSP 是由 SS7 链路互连的电话交换机，用来发起、终止或汇接呼叫。
- An IP PBX is telephone switching equipment that resides in a private business instead of the telephone company. IP PBX是私人公司中的电话交换设备,而不是电话公司中的电话交换设备。
- SS7 is a switch-to-switch protocol that lets telephone switches set up calls, manage circuits and perform intelligent network functions. 七号信令系统（SS7）是交换机至交换机的协议，它让电话交换建立通话、管理电路和执行智能网络功能。
- Field Automatic Telephone Switch 战地自动电话转换
- SSPs are telephone switches, interconnected by SS7 links, that originate, terminate or tandem calls. SSP 是由 SS7 链路互连的电话交换机，用来发起、终止或汇接呼叫。
- I groped for the light switch in the dark room. 我在黑暗的房间里摸索着找电灯开关。
- D.Talley, "Basic Telephone Switching Systems", Hayden Book Company, Rochelle Park, N.J. 1969. 由坐标式交换器所组成的交换网路。
- If not, the call went to the company's in-house telephone switching system, or PBX (private branch exchange). 如果没有，电话就转到公司内的电话交换系统（即pbx，用户电话交换机）。
- If not, the call went to the company's inhouse telephone switching system, or PBX (private branch exchange). 如果没有,电话就转到公司内的电话交换系统(即PBX,用户电话交换机)。
- Thus, in the byways of the telephone switching network, the first electrical self was born. 就这样，就在电话交换网络的两面交锋中，第一个电学意义上的自我诞生了。
- In a telephone switching system,inability to make a connection or obtain a service because the devices needed for the connection or service are in use. 在电话交换系统中,由于需要连接或服务的设备正在使用而不能连通或得到服务。
- SS7 is a switch-to-switch protocol that lets telephone switches set up calls,manage circuits and perform intelligent network functions. 七号信令系统（SS7）是交换机至交换机的协议，它让电话交换建立通话、管理电路和执行智能网络功能。
- semi-automatic telephone switch board 半自动电话交换机
- crossbar type automatic telephone switch 纵横制自动电话交换机
- A kite dangles from a telephone wire. 一只风筝悬挂在电话线上晃来晃去。
- I grope for the light switch in the dark room. 我在黑洞洞的屋里摸索著寻找电灯开关。
