Dahua NVR21-4KS3 Series User Manual page 59

The NVR48-16P-4KS2/NVR48-16P-4KS2/L/NVR48-16P-4KS2/I series rear panel is shown as below.
The NVR48-16P-EI series rear panel is shown as below.
Name
Power switch —
Power input
—
port
Audio input
MIC IN
port
Audio output
MIC OUT
port
Video output
VIEDEO OUT
port
Figure 2-72 Rear panel
Figure 2-73 Rear panel
Figure 2-74 Rear panel
Table 2-24 Ports
Function
Power on-off button.
90~264-12 VAC 12.5 A/-53 V 2.83 A.
Bidirectional talk input port. It is to receive the analog audio
signal output from the devices such as microphone, pickup.
Audio output port. It is to output the analog audio signal to
the devices such as the sound box.
● Bidirectional talk output.
● Audio output on 1-window video monitor.
● Audio output on 1-window video playback.
CVBS output.
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User's Manual