Dahua VTH5221D - Call from User

Interface Operation 70
6.4.3 Call from User
When another VTH calls this VTH, the call interface will be displayed, as shown in Figure 6-32.
Figure 6-32
 Press to talk with each other, as shown in Figure 6-33. For key description, please
refer to Table 6-5.
 Press to hang up.