Early network Bridges, protocol converters, and routers were simple dedicated hardware units typically configured through a terminal directly connected to a serial port on the unit itself.
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。
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In the end, the essay makes an evaluation on the plan of site selection of station for introducing Beijing-Guangzhou passenger dedicated line into Hengyang railway terminal.