Video Door Phone
Video door-phone (also known as video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is that it enables the person indoors to identify the visitor and, if (and only if) they wish, engage in conversation and/or open the door to allow access to the person calling.
Video door entry systems are commonly found integrated with different access control systems. This means that elements are installed in the same outdoor panel to allow certain previously authorised users to access the premises. The most common means are proximity cards, fingerprint readers, a keypad for secret numbers or even Bluetooth triggered by mobile phone.
Going a little further in time, we find video door phones featuring a video installation apart from the classical audio. In these cases, the intercom plate has the same structure as the previous version but features a video monitor connected to a surveillance camera that allows inspecting the person who pressed the button and part of the surrounding area.
Access control systems. Some manufacturers have also adopted the possibility of opening the door via a keyboard. By introducing a numerical secret code the electric strike is operated. Although there is also the possibility of being used as an access control with either a magnetic card or a smart card.