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Videoconferencing has also been called "visual collaboration" and is a type of groupware.

At the dawn of its commercial deployment from the 1950s through the 1990s, videotelephony also included "image phones" which would exchange still images between units every few seconds over conventional POTS-type telephone lines, essentially the same as slow scan TV systems.

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.

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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.One of the first commercial videoconferencing systems sold to companies came from Picture Tel Corp., which had an Initial Public Offering in November, 1984.In 1984, Concept Communication in the United States replaced the then-100 pound, US0,000 computers necessary for teleconferencing, with a ,000 circuit board that doubled the video frame rate from 15 up to 30 frames per second, and which reduced the equipment to the size of a circuit board fitting into standard personal computers.In the 1980s, digital telephony transmission networks became possible, such as with ISDN networks, assuring a minimum bit rate (usually 128 kilobits/s) for compressed video and audio transmission.During this time, there was also research into other forms of digital video and audio communication.

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