| 摘要 |
PURPOSE:To connect a telephone set to a general exchange and to attain cache information processing by providing the telephone set with a destination number information accumulating circuit, a ground information storing circuit, a clock circuit, etc., in addition to a telephone set basic circuit to execute process control. CONSTITUTION:When a handset is hooked off, the destination number information accumulating circuit 2, the ground information storing circuit 4, the clock circuit 5, and an output control circuit 6 are turned to driving states by a processor 3 in accordance with a hook switch detecting output from the telephone set basic circuit 1. In accordance with succeeding dialing operation, a destination number is accumulated in the circuit 2 through the circuit 1 and outputted to the circuit 4 at the time of ending the dialing and ground information data are selected and supplied to the processor 3. Consequently, the circuit 5 outputs the ground information data, the circuit 5 calculates calling time and using charge and outputs the calculated results to the circuit 6 and charge information is displayed or printed out through a display 7 or a printer 8. Thus, the telephone set can execute detailed cache information processing by connecting it to a general exchange.
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