PURPOSE:To attain a wide area service with a simple constitution by using a radio line controller at a mobile destination to apply position registration according to the request from a radio telephone set newly when a radio telephone set moves between different talking connection areas. CONSTITUTION...
private branch exchange 4, automatically representatively responds to the call, subsequently connects the call to hold the call, transmits a voice message showing that the cell is being handled to the caller and also calls the user by a speaker 170 in the area 101 or a local pager receiver ...