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Videotelephony developed in parallel with conventional voice telephone systems from the mid-to-late 20th century.

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Videoconferencing has also been called "visual collaboration" and is a type of groupware.A number of organizations believed that videotelephony would be superior to plain voice communications.However video technology was to be deployed in analog television broadcasting long before it could become practical—or popular—for videophones.Only in the late 20th century with the advent of powerful video codecs combined with high-speed Internet broadband and ISDN service did videotelephony become a practical technology for regular use.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.

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