Dahua Technology VTH2421F Series - From Contact; Call from User

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Figure 3-7 Calling
Figure 3-8 Call in progress
3.2.3.2 From Contact
Procedure
Step 1 Select
Call
>
Contact
.
Step 2 Select the one you want to call.
Step 3 Tap to start.
3.2.4 Call from User
When receiving calls from other VTHs, the following interface will be displayed.