| 摘要 |
PROBLEM TO BE SOLVED: To connect this image recording device with a front door slave device and a master device by using an already set wiring without using any special wiring by detecting an incoming signal from the front door slave device to the master device, detecting power supply from the master device to the front door slave device, and recording a video from a monitor camera, and outputting it to a monitor screen by the image recording device connected with a connection line. SOLUTION: When a calling button 12 is depressed, a master device 3 and an incoming detecting part 41 detects an incoming call from a front door slave device 1 through a connection line 2. An image recording device 4 starts at the time of receiving the incoming signal, and receives a videos signal photographed by a monitor camera 11 through the connection line 2, and records it in a recording part 43. The recorded videos signal is outputted through the connection line 2 to the master device 3, and reproduced on a monitor screen 31 of the master device 3. When the monitor screen 31 is turned off by the operation of the master device 3, power supply through the connection line 2 to the front door slave device 1 is stopped. A power supply detecting part 42 detects this, and stops the reproducing operation of the image recording device 4.
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