CCTV surveillance systems become more easily integrated with monitoring devices, alarm systems and access control devices, a third use of CCTV is gaining momentum: Helping security personnel to identify and interrupt security breaches as they're occurring, or even before they take place

CCTV stands for closed-circuit television and is commonly known as video surveillance. “Closed-circuit” means broadcasts are usually transmitted to a limited (closed) number of monitors, unlike “regular” TV, which is broadcast to the public at large. CCTV networks are commonly used to detect and deter criminal activities, and record traffic infractions, but they have other uses.