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Call a user in the same unit and the same building, dial room number directly.
Call a user in other buildings or units, add the building number. For example, dial
1#1#101 to call Building 1 Unit 1 Room 101.
If main VTH (101#0) calls extension (101#1), please enter room no.: #1; if the extension
calls main VTH, please enter room number.: #0.
Step 3 Tap .
If the VTH has a camera, there will be videos after answering the call.
Figure 3-8 Call not answered
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