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The answering machine, answerphone or message machine, also known as the telephone answering machine (or TAM) in the UK and some Commonwealth countries, ansaphone or ansafone (from a trade name), or telephone answering device (TAD) is a device for answering telephones and recording callers' messages.〔(TheFreeDictionary > answering machine ) Citing: The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009.〕 Unlike voicemail, which can be a centralized or networked system that performs a similar function, an answering machine must be set up in the user's premises alongside — or incorporated within — the user's telephone. == History == The tape answering machine records and replays sound using a technique originally invented in 1898 by Valdemar Poulsen which was the first practical device used for recording telephone conversations. Poulsen's device, known as a telegraphone or 'wire recorder', laid the foundation for the invention of the answering machines used today (though it was also used to record dictation and even music.)〔(【引用サイトリンク】url=http://transition.fcc.gov/cgb/kidszone/history_ans_machine.html )〕The creation of the first practical automatic answering device for telephones is in dispute. Clarence Hickman worked for Bell Laboratories from 1930 where he developed methods for the magnetic recording and working on the recognition of speech patterns and electromechanical switching systems. In 1934 he developed a tape-based answering machine which the phone company AT&T, as the owner of Bell Laboratories, kept under wraps for years for fears that an answering machine would result in fewer telephone calls. Many claim it was William Muller in 1935, but it could have been created already in 1931 by William Schergens whose device used phonographic cylinders.〔("Robot That Answers Phone Takes Messages" ''Popular Mechanics'', June 1931 )〕 Ludwig Blattner promoted a telephone answering machine in 1929 based on his Blattnerphone magnetic recording technology.〔(1929:Answering Machine : IN OUR PAGES:100, 75 AND 50 YEARS AGO ) New York Times, 10 Oct 1929, reprinted 11 Oct 2004, retrieved 7 Nov 2014〕 A commercial answering machine offered in the US in 1949, the ''Tel-Magnet'', which played the outgoing message and recorded the incoming message on a magnetic wire. It was priced at $200 but was not a commercial success. In 1949 the first commercially successful answering machine was the ''Electronic Secretary'' created by inventor Joseph Zimmerman and businessman George W. Danner, who founded Electronic Secretary Industries in Wisconsin. The Electronic Secretary used the then 'state-of-the-art' technology of a 45 rpm record player for announcements and a wire recorder for message capture and playback. Electronic Secretary Industries was purchased in 1957 by General Telephone and Electronics.〔David L. Danner, IDEAMATICS, In., McLean, VA〕〔THE HISTORY OF SOUND RECORDING: http://www.recording-history.org/HTML/answertech7.php〕〔http://www.etcia.com/history.html〕 Another commercially successful answering machine was the ''Ansafone'' created by inventor Dr. Kazuo Hashimoto, who was employed by a company called ''Phonetel''. This company began selling the first answering machines in the US in 1960.〔 While early answering machines used magnetic tape technology, most modern equipment uses solid state memory storage; some devices use a combination of both, with a solid state circuit for the outgoing message and a cassette for the incoming messages. In 1983, Kazuo Hashimoto received a patent for a ''digital answering machine'' architecture with US Patent 4,616,110.〔(【引用サイトリンク】title=Patent US4616110 - Automatic digital telephone answering apparatus )〕 The first digital answering machine brought to the market was AT&T's 1337; an activity led by Trey Weaver. Mr. Hashimoto sued AT&T but quickly dropped the suit because the AT&T architecture was significantly different from his patent.〔(About Inventor Benjamin Thornton )〕 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「Answering machine」の詳細全文を読む スポンサード リンク
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