IP cameras are most often used for IP surveillance, a digitized and networked version of closed-circuit television (CCTV).
IP摄像机通常用于IP监测、数字化和网络化的版本的闭路电视(CCTV)。
By the end of 1997, 308 signalised junctions on Hong Kong Island were under the ATC system and 40 closed circuit television (CCTV) cameras were in use for traffic surveillance.
年底时，港岛区有308个路口由区域交通控制系统控制，并有40部闭路电视摄影机，用以监察交通情况。
By the end of 1997, 308 signalised junctions on Hong Kong Island were under the ATC system and 40 closed circuit television (CCTV) cameras were in use for traffic surveillance.
年底时，港岛区有308个路口由区域交通控制系统控制，并有40部闭路电视摄影机，用以监察交通情况。
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