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。
In data communication, the connection through the public switched telephone network from a terminal to a service, network or computer. 数据通信中,通过公共电话交换网,实现一个终端和一个服务部门、网络或计算机的连接。
The integral DACT transmits system status to a central station via the public switched telephone network. 综合DACT通过公用交换电话网将系统状况传输到中央站。
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。
The number of lines and traffic of the Public Switched Telephone Network ( PSTN ) network have also been decreasing. 公共电话交换网(PSTN)的线路和流量也在减少。