| 摘要 |
PURPOSE:To expel easily a mischievous telephone call by recording an incoming signal from a telephone line to a recording means, reproducing the signal after a prescribed time is elapsed and transmitting the signal to the telephone line. CONSTITUTION:A call comes from a telephone line 1 to a telephone set 2 and the call is reponded to by hooking off a handset. If it is discriminated that the call is a mischievous call, a key 6 is set and a control section 3 starts recording of the opposite voice to a recording/reproducing section 4. An endless tape is used as the recording tape and when a constant position is detected (5), the control section 3 reproduces the recorded voice and transmits the voice to the line. Thus, the mischievous call is prevented effectively. |
