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Close Circuit TV
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CCTV systems may operate continuously or only as required to monitor a particular event. CCTV, utilizing Digital Video Recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion-detection and email alerts). IP-based CCTV cameras, some equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation.
Stand Alone Digital Video Recorder
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