In Wiltshire, Uk, in 2003, a pilot scheme for what exactly is now generally known as "Speaking CCTV" was put into motion, allowing operators of CCTV cameras to speak through the camera via a speaker when it is necessary. Closed circuit security cameras work on A personal network, transmitting movie https://beauhfbwf.wikibuysell.com/1376100/the_basic_principles_of_closed_circuit_camera_vector