(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
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.