CCTV cameras have long been a popular security measure in homes, businesses,
schools, bars, banks, country clubs and other establishments. The term CCTV stands
for Closed circuit television and essentially means that the footage is not broadcast
over the public airwaves. Rather, the footage stays within a closed loop that can be
viewed by authorized people only sgcctv. CCTV can be either wired or wireless and can be a
standalone device or part of a wider surveillance system.

The most common use of CCTV is to provide surveillance of a particular area in real
time. The footage can be monitored on site or remotely, allowing security teams to
react quickly to any potential issues in the area home security system Singapore. This is the type of surveillance you’ll
see in films when a security guard watches a wall of monitors with a bored
expression.
CCTV systems can also be used to record images for later review. This can be useful
for things like forensic analysis, traffic violations or even monitoring hazardous
industrial processes. The recordings can also be useful for identifying patterns of
behaviour that may be a sign of criminal activity, such as when cars are constantly
pulling out of a parking lot into oncoming traffic or when a customer is repeatedly
returning items to the store without paying.
Some CCTV systems can be connected to speakers and allow an overseer to speak
to people in the vicinity. This is often used in prisons, hospitals and high-security
areas or installations that would be dangerous for a human to enter, such as
radioactive or toxic industrial sites.

Many states in India have made it mandatory for establishments like shops, banks
and ATMs to install CCTV cameras. They need to display appropriate signage that
informs customers and passers-by that they are under surveillance. This is important
as it can deter crime from happening in the first place, especially if people know that
they are being watched.
There are two main types of CCTV systems, analogue and IP (Internet Protocol).
Analog CCTV systems have standard analog camera signals that are transmitted to a
DVR or Digital Video Recorder using transmission cables. The DVR then converts the
signal to a digital format and stores it on hard drives for live viewing or remote
access. The DVR can also transmit the CCTV over a network to be viewed on a
computer screen.
An analogue CCTV system can be updated to an IP system by replacing the DVR with
an NVR or Network Video Recorder. An NVR works the same way as a DVR but uses
a LAN (Local Area Network) to connect to your cameras and can be accessed over
the internet for remote viewing.
Some cameras are designed to be motion-detection activated and will only record
when the movement sensor detects a change in the image. This can be a big saving
on hard drive space as the camera will only record the footage when there is
movement and not continuously recording for no reason.