大容量公共移动电话网除具有市话的控制交换功能外,还具有移动通信特有的跟踪交换功能(如位置登记技术、一齐呼叫功能、话音跟踪监测、通话中的信道切换等)。1.位置登记及一齐呼叫在大范围的服务区域情况下,要寻呼某个移动台,若事先不知道它所处的位置,盲目寻呼.线路的使用效率不高。为此, In addition to the control and exchange functions of the local telephone, the large-capacity public mobile telephone network also has the tracking and exchange functions (such as location registration technology, call-in-place function, voice tracking and monitoring, channel switching in the call, etc.) that are unique to mobile communications. 1. Location registration and call together In the case of a wide range of service areas, to page a mobile station, if it does not know in advance its location, blind paging. The use of lines is not efficient. to this end,