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| broadband networks ： ウィキペディア英語版 |
broadband networks
The ideal telecommunication network has the following characteristics: broadband, ''multi-media'', ''multi-point'', ''multi-rate'' and economical implementation for a diversity of services (multi-services) ()(). The Broadband Integrated Services Digital Network (B-ISDN) intended to provide these characteristics. Asynchronous Transfer Mode (ATM) was promoted as a target technology for meeting these requirements().
== Communication services ==
Personal computing facilitated easy access, manipulation, storage, and exchange of information, and required reliable data transmission. Communicating documents by images and the use of high-resolution graphics terminals provided a more natural and informative mode of human interaction than do voice and data alone. Video teleconferencing enhances group interaction at a distance. High-definition entertainment video improves the quality of pictures, but requires much higher transmission rates.
These new data transmission requirements may require new transmission means other than the present overcrowded radio spectrum ()(). A modern telecommunications network (such as the broadband network) must provide all these different services (''multi-services'') to the user.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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