In Wiltshire, Uk, in 2003, a pilot plan for exactly what is now known as "Speaking CCTV" was put into action, allowing operators of CCTV cameras to communicate with the camera by way of a speaker when it is needed. Analog cameras, one of several earliest types of CCTV cameras, https://history-of-judo05779.blogofchange.com/34686347/a-review-of-closed-circuit-cameras-for-home