Video intercom - a communication device, allowing not only engage in dialogue with the visitor, but to see it through the built-in monitor, receiving a signal from an external camera. In this case, the visitor, usually, may send a call signal, and the owner has the ability to video door remote control door lock, that corresponds to that of a conventional intercom. The presence of visual images significantly improves the accuracy of authenticating users and determining the conditions for off-site, which in turn, dramatically enhances the overall level of security and psychological comfort of the user's system.
In most cases,, Visitors are not required to provide the owner of the picture, and therefore almost all video intercoms are unidirectional video transmission channel - with the outside of the camera or external camera, located at the entrance to monitor subscriber unit. An exception can be made for video intercoms special requirements and non-standard products.
modern video intercoms от Security shop this is not just a means of authentication and access control. They are often equipped with security functions and, able to detect movement in the space of the camera feed and the recording video signal to the memory card.
Advanced functionality can also provide remote control and video surveillance over the Internet or local network. Such devices are significantly more expensive than conventional video intercom and practically do not apply to collective systems, but can be very useful when installed in private houses or in the front door of the flat.
Broadcast video, depending on the type of video intercom, It can be arranged in both analog, and in digital format. Analog systems are easier and cheaper, but, with the development of technology, they increasingly give way to share the applicability of more functional and fully digital systems.