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Some control rooms are themselves under continuous video surveillance and recording, for security and personnel accountability purposes. Many control rooms are occupied on a " 24/7/365 " basis, and may have multiple people on duty at all times (such as implementation of a " two-man rule "), to ensure continuous vigilance.
Industrial video surveillance systems use network video recorders to support IP cameras. These devices are responsible for the recording, storage, video stream processing, and alarm management. Since 2008, IP video surveillance manufacturers can use a standardized network interface to support compatibility between systems. [161]
Audio and video verification techniques use microphones and cameras to record audio frequencies, video signals, or image snapshots. The source audio and video streams are sent over a communication link, usually an Internet protocol (IP) network, to the central station where monitors retrieve the images through proprietary software.
Physical security systems for protected facilities can be intended to: [2] [3] [4] deter potential intruders (e.g. warning signs, security lighting); detect intrusions, and identify, monitor and record intruders (e.g. security alarms, access control and CCTV systems);
No colours are specified in ISO 7001, with the only guidance being to ensure clear contrast between the symbol and the sign background, as well as the environment the sign is in. There is a clear recommendation against using colors specified in ISO 3864, due to possible confusion with safety signage using those colors. Of explicit concern is ...
L.E.D. Electronic Signs LED sign, in a wall-mounted orientation, depicting an emergency and the resulting action that should be taken to mitigate the emergency LED electronic signs use light-emitting diodes to display messages when connected over a network to an emergency communication system. LED signs, when deployed in large numbers on a ...
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