Closed-circuit television: Difference between revisions

'''Closed-circuit television''' ('''CCTV'''), also known as '''video surveillance''',<ref>{{cite book|editor1-last=Kumar|editor1-first=Vikas|editor2-last=Svensson|editor2-first=Jakob|title=Promoting Social Change and Democracy Through Information Technology|date=2015|publisher=IGI Global|isbn=9781466685031|page=75|url=https://books.google.com/books?id=jkdLCgAAQBAJ&pg=PA75}}</ref><ref>{{cite book|last1=Dempsey|first1=John S.|title=Introduction to private security|date=2008|publisher=Thomson Wadsworth|location=Belmont, CA|isbn=9780534558734|page=78|url=https://books.google.com/books?id=qQo7oDMSVXgC&pg=PA78}}</ref> is the use of video[[closed-circuit camerastelevision camera]]s to transmit a signal to a specific place, on a limited set of monitors. It differs from [[broadcast television]] in that the signal is not openly transmitted, though it may employ point-to-point, point-to-multipoint (P2MP), or [[Mesh networking|mesh]] wired or [[Wireless|wireless links]]. Even though almost all video cameras fit this definition, the term is most often applied to those used for [[surveillance]] in areas that require additional security or ongoing monitoring ([[Videotelephony]] is seldom called "CCTV"<ref>Verman, Romesh. [https://books.google.com/books?id=1VUU-eRAObAC Distance Education In Technological Age], Anmol Publications Pvt. Ltd., 2005, pp.166, {{ISBN|81-261-2210-2}}, {{ISBN|978-81-261-2210-3}}.</ref><ref>"Distance education in Asia and the Pacific: Proceedings Of The Regional Seminar On Distance Education, 26 November – 3 December 1986", Asian Development Bank, Bangkok, Thailand, Volume 2, 1987</ref>).