| 摘要 |
PROBLEM TO BE SOLVED: To provide a monitoring camera system that a camera door slave machine is connected to a monitoring camera controller and includes a television doorphone master machine and an interphone master machine, which can communicate with the camera doorphone slave machine. SOLUTION: Camera doorphone slave machine I/F 11 which is for connecting a color or black/white camera doorphone slave machine and has an overlap/ separation circuit 110, an incoming call detection circuit 111, a power supply circuit 112, a sound processing circuit 113, a color or back/white video processing circuit 114 and a hybrid(HYB) circuit 115 and color or black/white television door master machine I/F 12 which has an overlap/separation circuit 121, an incoming call transmission circuit 122, a call detection circuit 123, a sound processing circuit 124, a video processing circuit 125 and a hybrid(HYB) circuit 126 and which is for connecting a television doorphone master machine 5 are provided for the monitoring camera controller 3 of a monitoring camera system. Thus, the connection of the camera door slave machine 1 and bi- directional communication (conversation) can be realized.
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