Dahua VTH5221 series, Quick Start Manual, Page: 6 / 28

1
1
Product Structure
Front Panel 1.1
Different models of devices may have different front panel dimensions and key types, but keys
or indicators with the same silkscreen or icon have the same function. Please refer to Table 1-1
for details.
Table 1-1 Front panel description
Icon or
Silkscreen
Name Description
SOS Press this key to call the Call Center in case of emergency.
Menu Press this key to return to main menu.
Call
In case of incoming call, press this key to answer the call.

During talk, press this key to hang up. 
During monitoring, press this key to speak to unit VTO, villa

VTO, fence station and verifying VTO.
During speaking, press this key to exit speaking.

Monitor
In standby mode, press this key to monitor the main VTO.

During monitoring, press this key to exit monitoring. 
Unlock
In case of incoming call, talk, monitoring and speaking of VTO,
press this key to unlock corresponding VTO.
Message
indicator
If this indicator turns on, it represents that there are unread
messages.
Power
indicator
If this indicator turns on in green, it represents normal power
supply.
Network
Network
indicator
If this indicator turns on, it represents normal

communication with VTO.
If this indicator turns off, it represents abnormal

communication with VTO.
DND
DND
indicator
If this indicator turns on in green, it represents that DND
function is enabled.
For DND settings, please scan QR code on the front cover, and
refer to the user’s manual.