CCTV (Closed-Circuit Television) is a system of cameras, transmission, recording and viewing used to observe defined areas for a security or operational purpose. It may be analogue, IP or hybrid and can add analytics, but capability depends on cameras, recorder, licences and environment. More resolution does not automatically produce useful evidence: lens, distance, light, angle, compression and retention determine the result. Design should justify purpose, coverage, notices, access, retention and export for the applicable context, while protecting credentials and firmware. Tests should use real scenes by day and night and verify search, playback and component loss. Seeing live video does not prove recording or recoverability. Human procedures and response ownership are as important as camera placement.
IT glossary
CCTV (Closed-Circuit Television)
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