Dahua NVR4108-P User Manual page 80

Please refer to the following sheet for detailed information.
Name
Power
switch
MIC IN
MIC OUT
1～2
C
Function
/ Power on/off button.
Power input port Input DC 53V--2.3A
Audio input port Bidirectional talk input port. It is to receive the analog
audio signal output from the devices such as mike
phone, pickup.
Audio output port. It is to output the analog audio signal
Audio output port
to the devices such as the sound box.




Alarm input port
1～2
GND Alarm input ground port.
Alarm output public end.
Alarm output
public port
Figure 2-39
Bidirectional talk output.
Audio output on 1-window video monitor.
Audio output on 1-window video playback.
When your alarm input device is using external
power, please make sure the device and the NVR
have the same ground.
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