Videotelephony
Videos
Videotelephony is the use of audio and video for real-time communication between people.
A telepresence system in 2007
Videotelephony predicted to be in use by 2000, as envisioned in 1910 (artist's conception)
Videotelephone booth, 1922
Multiple user videoconferencing first being demonstrated with Stanford Research Institute's NLS computer technology (1968)
Telephony
Videos
Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone.
A commercial IP telephone, with keypad, control keys, and screen functions to perform configuration and user features.