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5.3 Local Operation
1. Answer/hang up calls
When the door phone calls the indoor unit, click the
button to answer
the call, and click the button to hang up the call.
2. Unlock the door
During the call of indoor unit and door phone, click the
button to unlock
the door.
3. Volume adjustment
When the indoor unit is talking to other devices like door phone, click the
button to increase the volume, and click the button to decrease the
volume.