Introduction
Video door phone is an intercom system that helps manage calls made at the entrance to a building, individual apartments, workplace, etc. It provides controlled access with the help of an audiovisual communication between the inside and outside. The main feature of video door phone is that it enables the person indoors to identify the visitor open the door to allow only if they wish to.
Video door entry consists of both outside and indoor elements – an outdoor panel on the outside, an electronic lock release and an indoor monitor. The outdoor panel is installed next tp the entrance door of the house or the building. It has built-in technology to be ready for use in any climate conditions. It contain push buttons to make the call (usually one per home or apartment), a micro camera adapted for night vision to capture the image of the caller, a microphone to pick up their voice and a speaker to reproduce the voice of the occupant indoors. The indoor monitor allows the occupant to see who has called, talk to the visitor and open the door. The electric door release(optional) is a installed in the door lock that helps electronically opening of the door rather than manual
Emerging technology in video door phones currently available in the market are ready to accept extensions, making the monitor into a small automatic function control centre. From here, the user can view one or several additional cameras installed at other access points, trigger light switches or open a second door, etc. Also, they can be integrated with different access control systems including proximity cards, fingerprint readers, a keypad for secret numbers or even Bluetooth triggered by mobile phone.