| 摘要 |
PURPOSE:To eliminate the need for reset operation, by making an automatic answering telephone set detect automatically that a line is interrupted after a caller listens to the recorded content of a receiving tape with remote control and resetting a telephone set to the receiving mode. CONSTITUTION:A transient pulse generated and transmitted on a line when a caller hooks on a telehone set, is detected at a pulse detecting block 6. Further, an output from the pulse detecting clock 6 is inputted to a timer-cut block 7 to cut off the operation of a timer block 10. Then, a holding circuit 2 is reset and the telephone set is reset to the receiving mode. |
