Dahua VTO3211D-P

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Name
Description
+12V
12V DC power port
GND
Door sensor feedback
RS-485A
RS485 communication port
RS-485B
VTO3211D-P
2.5.1 Front Panel
Number of buttons on the front panel varies on different models. VTO3211D-P2 has two buttons;
VTO3211D-P4 has four buttons. The following figures use VTO3211D-P4 as example.
VTO3211D-P
Table 2-10 Front panel description
No.
Name
Description
1
IR Fill light
Provides extra IR light for the camera when it
is dark.
2
Camera
Monitors door area.
3
Speaker
Outputs audio.
4
Call button
Press to call VTH or the management center.
5
MIC
Inputs audio.