This technique was very expensive, though, and could not be used for applications such as telemedicine, distance education, and business meetings.
Simple analog videophone communication could be established as early as the invention of the television.
Such an antecedent usually consisted of two closed-circuit television systems connected via coax cable or radio.
Videoconferencing (VC) is the conduct of a videoconference (also known as a video conference or videoteleconference) by a set of telecommunication technologies which allow two or more locations to communicate by simultaneous two-way video and audio transmissions.
It has also been called 'visual collaboration' and is a type of groupware.
Videoconferencing differs from videophone calls in that it's designed to serve a conference or multiple locations rather than individuals.