How to use Letv mobile phone at the office door?

Generally, the videophone installed in the residential area is called the building video intercom system, which can identify the visiting guests with images and sounds, control the door locks, send a help signal to the management center in an emergency, and the management center can also release information to residents.

1. The three icons you mentioned represent:

The icon "Man" usually represents the "Monitor" key. Press this button to see the image outside the door machine;

Press the "phone" icon to talk to the visitors at the door;

The "key" icon is the switch that controls the downstairs unit.

2. If you live in 6-2, you can try to press "0602" and "602". If the indoor unit still does not respond, it is considered that there is something wrong with the wiring of the indoor unit, and it is recommended that the property management personnel repair it.

3. Generally, only when a visitor calls the indoor unit from downstairs will the corresponding indoor unit use the visual dialogue system. At this time, you can choose dialogue or directly open the unit door. When there is no call from the machine downstairs, we can take the initiative to check the picture of the machine downstairs.