Closed-circuit television (CCTV), also known as video surveillance, is the use of
video cameras to transmit a signal to a specific place, on a limited set of monitors. It
differs from broadcast television in that the signal is not openly transmitted, though it
may employ point-to-point (P2P), point-to-multipoint (P2MP), or mesh wired or wireless
links. Though almost all video cameras fit this definition, the term is most often
applied to those used for surveillance in areas that require additional security or
ongoing monitoring. Though videotelephony is seldom called "CCTV" one exception is the
use of video in distance education, where it is an important tool
Analogue CCTV cameras record images to a digital recorder which converts the
video to a digital format. To view the video, the DVR needs to be connected
to a monitor or router to be broadcast through an internal network for remote
access. However, there are government regulations for the strength of analogue
signals