This means that some areas in your prison will go dark, and you won't be able to monitor them via the camera until its turn in the cycle. If more cameras are added, the monitor will cycle through the additional cameras. CCTV Cameras will only work fully if they are connected to a CCTV Monitor via the connect wires tab in utilities. The CCTV camera has a visual range of 20 blocks. It is used to reveal fog of war in unguarded areas of your prison. CCTV cameras can be mounted on walls, fences, camera pillars, and can even be positioned on their own.
Closed Circuit Television, or more simply CCTV, is a camera surveillance object available in Prison Architect unlocked by researching surveillance in bureaucracy screen.