| 摘要 |
PURPOSE:To call a portable set moved to a zone of other base station without installing an exclusive radio equipment by providing a 2nd call function calling the portable set via a base station around base stations whose position is registered. CONSTITUTION:When a call comes to a portable set 5a from a line 1, a wired communication exchange 6 searches the information of registering the position of the set 5a to detect a base station of a zone to which the exchange is located. As a result, when a base station of a zone where the set 5a is located is a base station 3b, the set 6 uses a 1st call function to be stored and the station 3b calls the set 5a. Then a 2nd call function is used to call the set 5a in a prescribed timing from a base station 3a of a zone 4a adjacent to a zone 4b of the station 3b and the base station 3c of the zone 4c. When the set 5a is moved from the zone 4b of the station 3b to the zone 4c of the station 3c and the position registration is not yet revised, the set 5a receives a radio wave from the station 3c and replies it to attain talking via the exchange 6. |
