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The White Alice Communications System (WACS, "White Alice" colloq.) was a United States Air Force telecommunication network with 80 radio stations constructed in Alaska during the Cold War. It used tropospheric scatter for over-the-horizon links and microwave relay for shorter line-of-sight links. Sites were characterized by large parabolic, tropospheric scatter antennas as well as smaller microwave dishes for point to point links. The system connected remote Air Force sites in Alaska, such as Aircraft Control and Warning (AC&W), Distant Early Warning Line (DEW Line) and Ballistic Missile Early Warning System (BMEWS), to command and control facilities and in some cases it was used for civilian phone calls. The system was advanced for its time, but became obsolete within 20 years following the advent of satellite communications. ==Background== White Alice was conceived in the 1950s when Alaska had only basic telephone communication systems. For example, prior to White Alice only one phone call at a time could be placed from Nome to Fairbanks. Communication improved after White Alice was installed, but even in the mid 1960s an Anchorage resident had to go to one location downtown to place a call to the lower 48. The Air Force built the White Alice Communications System with numerous support facilities around the state to provide reliable communications to far-flung, isolated, and often rugged locales. Construction began in 1955 and the system was dedicated in 1958. In the end, 71 systems were installed throughout Alaska. White Alice was designed by Western Electric, and civilian contractors maintained it. In 1976, the WACS was leased to RCA Alascom. By the end of the 1970s, most of the system was deactivated. In the 1950s the Air Force used two word code names and White Alice was the code name selected for the project. It is fairly certain that White was used to indicate the snowy Arctic sites that the system would serve. However, it is unclear where the term Alice originated. Some sources suggest that Alice is an acronym for ALaska Integrated Communications Enterprise. Other sources suggest that the system would have been named Alice White had there not been an actress with that name at the time. Thus it was reversed to White Alice. It is also possible that the code name White Alice was selected for no particular reason.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「White Alice Communications System」の詳細全文を読む スポンサード リンク
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