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Networking CCTV cameras

The city of Chicago operates a networked video surveillance system which combines CCTV video feeds of government agencies with these of the private sector, installed in city buses, businesses, public schools, subway stations, housing projects etc. Even home owners are able to contribute footage. It is estimated to incorporate the video feeds of a total of 15,000 cameras.

The system is used by Chicago's Office of Emergency Management in case of an emergency call: it detects the caller's location and instantly displays the real-time video feed of the nearest security camera to the operator, not requiring any user intervention. While the system is far too vast to allow complete real-time monitoring, it stores the video data for later usage in order to provide possible evidence in criminal cases.[41]

London also has a network of CCTV systems that allows multiple authorities to view and control CCTV cameras in real time. The system allows authorities including the Metropolitan Police Service, Transport for London and a number of London boroughs to share CCTV images between them. It uses a network protocol called Television Network Protocol to allow access to many more cameras than each individual system owner could afford to run and maintain. [edit] Integrated Systems An integrated systems unit.

Integrated Systems allow users to connect remotely from the internet and view what their cameras are viewing remotely, similar to that of IP cameras. In one incident, a lady from Boynton Beach, Florida was able to watch her house get robbed and contacted police directly from her office at work.  Niche uses An example of a CCTV camera with speakers attached, in Ipswich, UK

* CCTV at Hessdalen AMS is used for watch out for unidentified lights. * In the earlier days of television, some programs, and selected live sporting events, were demonstrated on closed-circuit television in theaters across the United States. The 1952 Metropolitan Opera production of Bizet's Carmen was telecast complete by NBC on closed-circuit television. From 1965–1970, the Indianapolis 500 was shown live on closed-circuit television in many movie theatres. The first few WrestleMania events were shown in such a way as well, as were many boxing matches including Larry Holmes vs. Gerry Cooney. The first six Super Bowls were shown at special closed-circuit TV gatherings in the host cities, where the game was blacked out by National Football League rules in place at the time. * In the UK, some places have installed talking CCTV so operators can talk to the people they monitor. * British author Chris Roberts quips that “Closed-Circuit Television Cameras are proving very useful to low-budget TV producers throughout the UK for programmes along the lines of World’s Rudest Drunks Outside Nightclubs in the North of England.” 

[edit] CCTV countermeasures

Unless physically protected, CCTV cameras have been found to be vulnerable against a variety of (mostly illegal) tactics:

* Some people will deliberately destroy cameras. Some outdoor cameras, such as those employed by the Chicago Police Department, have bullet-resistant housing] * Spraying substances over the lens can make the image too blurry to be read. * Laser pointers can temporarily blind cameras,[44] and higher powered lasers can damage them. However, since most lasers are monochromatic, colour filters can reduce the effect of laser pointers. However filters will also impair image quality and overall light sensitivity of cameras (see laser safety article for details on issues with filters). Also, complete protection from infrared, red, green, blue and UV lasers would require use of completely black filters, rendering the camera useless. * For wireless networks, broadcasting a signal at the same frequency of the CCTV network is reported to be able to jam it.

 

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