Digital video recorders configured for physical security applications record video or video and audio signals from closed circuit television cameras for detection and documentation purposes. This will allow you to search by event, time, date and camera whenever it is required. The DVR can also be set to overwrite the oldest security footage should the disk become full and the possibility of having remote access to security footage using a PC that can be achieved by connecting the DVR to a LAN network or the internet.

Closed Circuit Television (CCTV) is the use of video cameras to transmit signal to a specific, limited set of monitors. CCTV is often used for surveillance in areas which need monitoring, such as banks, casinos, airports, military installations and convenience stores.