Wiring diagram of video phone system
Requirements on cabling of the system
Video door phone system uses 8 core cables. Maximal distances between camera unit and monitor with
regards to the cross sectional area (CRA) of the wires is show in the following table.
In the areas with high possibility of interference it is recommended to use a 75 Ohm coaxial cable for
connection of video signal.
CRA of the wire [mm] 0,5 0,65 0,8 1
Distance [m] 30 50 70 115
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