Dahua VTO2000A Series

Figure 1- 4
1.3.2 Group Call Scene
When visitor press Call on VTO, multiple VTH will ring at the same time. The resident can
anwer, hang up or unlock door from any of the VTHs.
Note:
VTH has main VTH (host) and sub VTH (extension). One host can have up to 3
extensions.
See Figure 1- 5.
Figure 1- 5