Dahua NVR21-4KS3 Series User Manual page 67

The figure is for reference only.
Port Name
HDMI
MIC IN
MIC OUT
VGA
1–4
N1, N2
C1, C2
PoE PORTS
Figure 2-81 Rear panel
Figure 2-82 Rear panel
Table 2-30 Ports
Connection
GND
USB port
High Definition
Media Page
Audio input port
Audio output port
VGA video output
port
—
—
—
—
Network port
PoE port
47
Function
Ground end.
USB port. Connect to mouse, USB storage device
and more.
High definition audio and video signal output
port. It transmits uncompressed high definition
video and multiple-channel data to the HDMI port
of the display device. HDMI version is 1.4.
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.
VGA video output port. Output analog video
signal. It can connect to the monitor to view
analog video.
—
—
—
—
10/100 Mbps self-adaptive Ethernet port. Connect
to the network cable.
Built-in switch. Support PoE function.
For PoE series product, you can use this port to
provide power to the network camera.
User's Manual