LevelOne FCS-4300 - Manual (Page 9)

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unscrew the bottom screw to install cables.
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Insert the plug, and pull these cables through out from the bottom of bracket.
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For the alarm cable
Brown Red Orange Yellow Green Blue Black White
DI 1 DI 2 DI 3 DI 4 GND NC COM NO
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Hook up the safety buckle, and screw the two screws to fix the power box.
Power&A/V Cable
Alarm Cable
Microphone Cable
Speaker Cable
LAN Cable
Reset Button