CCTV systems also known as video surveillance use cameras to capture video footage of a facility. This footage is sent to a recording device (a DVR or NVR), where it is stored for future reference. It is then sent from the cameras to a dedicated monitor, or even a smartphone or computer, which displays the footage in real time. CCTV security systems are connected with a coaxial cable, network cable, or wireless signal, depending on the system type.
