| 摘要 |
PURPOSE:To eliminate the sense of incongruity at the listening sense by provid ing a means connecting a wired telephone set and a wired telephone line into a master equipment and providing a means retarding the detection output of a call signal from the wired telephone circuit so as to reduce the difference between the start of ring tone at the incoming call to the wired telephone set and the start of ring tone of a radio telephone set. CONSTITUTION:The master equipment 1 is provided with a delay circuit 59, a flip-flop 60, a relay 61, a voltage detection circuit and an OR gate 64. More over, a wired telephone set 58 is connected to the relay 61 and the voltage detection circuit via a connection terminal 62. When a call signal detection circuit 30 detects a call signal from the wired telephone line 3, its detection output is inputted to a control circuit 12 and a delay circuit 59. After the delay circuit 59 retards the inputted detection output for a prescribed time t3, the result is inputted to the set terminal S of the S-R flip-flop 60 to drive the relay 61, thereby throwing contacts of the relay 61. Thus, the start of ring tone from the call signal of the wired telephone set 58 is delayed and brought into the vicinity of the ring tone start of the radio telephone set. |
