| 摘要 |
PURPOSE:To provide several functions of displaying charge in a call and of serving as a timepiece while any call is not made, by adding a display part and counting circuit to a telephone set. CONSTITUTION:With handset 7 off the hook, the dial is operated to dispaly a dial number on digital display part 1. From the point in time when a party subscriber answers, calculation circuit 4 calculates the signal of time counter 3 and then sends the signal to data processing circuit 2 and memory 5. On receiving the signal from memory 5, circuit 2 processes it and sends the signal to digital display part 1 to display digitally the charge moment by moment. The charge at the point of a call end is stored in memory 6 receiving the signal of memory 5. This charge is displayed on display part 1 by way of circuit 2 by the signal of handset 7. With handset 7 off, the signal of counter 3 is inputted to display part 1 via circuit 2, so that display part 1 can be used as a timepiece. |
