Although not as widely used in everyday communications as audio-only and text communication, useful applications include sign language transmission for deaf and speech-impaired people, distance education, telemedicine, and overcoming mobility issues.It is also used in commercial and corporate settings to facilitate meetings and conferences, typically between parties that already have established relationships.During this time, there was also research into other forms of digital video and audio communication.
In 1992 CU-See Me was developed at Cornell by Tim Dorcey et al.
The news media were to become regular users of mobile links to satellites using specially equipped trucks, and much later via special satellite videophones in a briefcase.
This technique was very expensive, though, and could not be used for applications such as telemedicine, distance education, and business meetings.
The development of the crucial video technology first started in the latter half of the 1920s in the United Kingdom and the United States, spurred notably by John Logie Baird and AT&T's Bell Labs.
This occurred in part, at least with AT&T, to serve as an adjunct supplementing the use of the telephone.