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| Closed Circuit Television Systems (CCTV) play an important role in the administration and security
management of a facility, by being able to monitor and record all the activities within. The choice camera
determines the efficacy of the system. A well-designed system would utilize a combination of both fixed and
mobile cameral (with pan, zoom and tilt functions) depending on the location. Fixed cameras provide a
permanent and assured field of view. Such cameras are ideal for gates and entry points that need to be
monitored and recorded at all times. On the other hand, mobile cameras are suited for real time surveillance
applications where large areas (such as perimeter, lobby, areas involving public activity) have to be
monitored. When images from multiple cameras need to be archived, it is essential to multiplex the images so
as to record them simultaneously onto one media. These images can be stored as analog data on a standard
VHS tape or in a digital format on a hard disk. Some applications may require multiple operators at different
locations to access the video information from various cameras located in different parts of the facility. This
can be achieved by using either a matrix switcher or a video switcher together with network multiplexers. |
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