| 摘要 |
PURPOSE:To enable service tariff management for incoming call by providing a device that enables a called subscriber to discriminate originating area of a caller by dialing specified items when making a reply to incoming call from main wire using an extension telephone set or a main wire repeating board. CONSTITUTION:At the time of incoming from a main wire 2 to the main body 1 of an automatic privated branch exchange and an extension telephone set 3 makes a reply, a called subscriber asks originating area of a caller, makes hooking, and dials special number that indicates incoming call service tariff management. on discriminating it, the main body 1 sends out dial tone to the telephone set 3 and reports that the main body 1 can receive number of originating area. When the called subscriber dials the area number of the caller, charging registration is completed. The main body 1 sends a tone signal to the telephone set 3 and when the called subscriber hooks on, the main wire 2 becomes holding state. Then, the main body 1 calls the telephone set 3, when the telephone set 3 makes a reply, holding state of the main wire 2 is released and becomes the state that allows speaking. At the same time, tariff calculation is started by a service tariff managing device 4. |
