公用交换网 meaning in Chinese

public switched network psn

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。
The current communication network in the world consists of many private networks and public switching networks . these private networks are connected by switching networks and separately managed . some private networks have built management system , but some have n ' t
当今世界上现有的通信网一般是由许许多多个独自管理的专用网和多个公用交换网相互联组成的，有的专用网已经建立起网络管理系统，有的则正在建立之中。