Closed-circuit television (CCTV) is a specific type of surveillance system that has actually been around since the 1940s. CCTV cameras capture a sequence of images and then transmit them to a monitoring and recording device. Closed-circuit simply means that the transmission is not ‘open’ i.e. not public.
CCTV prevalence today
There are thought to be in excess of five million CCTV cameras in the UK, with the vast majority being privately owned.
Is it an effective crime-prevention tool?
According to research, CCTV is an effective crime deterrent as places with CCTV see around 13% less crime than those without.
If you are considering installing CCTV, there are a number of companies that specialise in CCTV in Gloucester and the surrounding areas. Many of these firms have online resources for your perusal, such as the examples seen here: https://apmfireandsecurity.com/cctv-installation/cctv-installation-gloucester/.
Do CCTV cameras need an internet connection?
Wired CCTV systems do not require an internet connection. They are designed to be independent, and they usually use cables to transmit footage between the cameras and monitors or recording devices.
Standalone DVR/NVR systems are also able to function without an internet connection. They record ‘locally’ i.e. directly onto a hard drive or other storage device. These systems are self-contained and are commonly seen on construction sites or other premises with poor or non-existent internet connectivity.
Wireless CCTV systems do require an internet connection to transmit signals and enable remote viewing. This type of system usually stores the footage in the cloud rather than on local devices.
IP-based systems also require an internet connection for both live streaming and remote access. They are used to capture high-quality images and, because they transmit the images immediately via an IP network, the footage can be viewed live.