Dahua VTH5221 Series User Manual

Product Structure 6
Icon
Name
Description
Unlock
Press this key during calling, talking, monitoring and
speaking of VTO, so corresponding VTO will be
unlocked.
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.
Table 2-5
2.1.4 VTH15 Series Type CH /VTH5222CH
Figure 2-6

Dahua VTH5221 Series Specifications

General

Brand	Dahua
Model	VTH5221 Series
Category	Intercom System
Language	English