A video intercom is quite similar to an intercom: A device that enables those who are inside a certain place to allow or not allow other people to have access to it. Who makes this control can open doors or gates just by pressing a button. However, in the case of the video intercom there is an additional tool: the camera. Thus, the identification is not only done by voice, but also by image. The device is no longer just a form of access control, but also a surveillance equipment. The better the video intercom, the more features it can offer: Large number of cameras, control of more locks, better image quality, audible warnings and much more. Thus, it consolidates itself as the most efficient in residential or business access control technology.