| 摘要 |
PURPOSE:To easily introduce charge instantaneous notification service in a short time by making a charge instantaneous notification service device independent of a telephone exchange main body, and connecting it to subscriber's line of the exchange. CONSTITUTION:A charge instantaneous notification service device 7 is connected to the telephone exchange 2; a means to transmit a caller's telephone number information, a callee's telephone number information, and a service time information to the device 7 every time when the speaking ends on the caller's telephone- side and on the callee's telephone-side, is provided to the exchange 2. The charge instantaneous notification service device 7 is provided with a means to receive data form a telephone exchange 12 and a means which calculates a service charge and the distance of the speaking from a received data and informs, in voice, a service time information and a service charge information from a dedicated subscriber's line to the caller's telephone set via the telephone exchange. As a result, without executing any new design modification or remodeling, the charge instantaneous notification service can be introduced to a telephone exchange that does not have this function.
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