Video Door Phone is also caller Video Intercom system. It consist of two parts –
Indoor Monitor – is a Video Screen monitoring system with TFT or LCD screen, speaker, microphone and SD memory (optional) etc.
Outdoor Station – consist of a doorbell, speaker, microphone, camera with night vision facility etc.
Operation Principal – When the visitor comes at the entrance of a house or office or apartment etc, instead of normal calling bell, he PRESS a Doorbell on the, the ring bells in the Indoor monitor and picture of visitor is also visible on the video monitor. The person inside house / flat can see picture of visitor and can also talk. He can also OPEN the Door Lock by pressing button on Video Monitor. The Video Monitor also has SD Flash memory (Optional) to see visitors pictures ( 100 nos maximum capacity)
Apartment Video Door Phone – is mainly installed where no of flats are many, particularly in a high rise buildings. In such system Video monitors are installed in each flats but only 1 Outdoor station is fixed at the ground floor lobby of the house, generally outside the entrance.
When the visitor comes, he press the desired Flat no (code) in the outdoor station, the person inside the flat see the pictures and talks with visitor. After he is sure to meet the visitor, he opens the Door Lock at the entrance of Lobby. After the visitor reaches the desired flat, there is a 2nd Outdoor station (Optional), the visitor again press the bell and the function is repeated.