File:Bell telephone magazine (1922) (14776345033).jpg

Identifier: belltelephone6667mag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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oke signals, jungle drums, the printing press — all helped, but it was electricity that gave man his seven-league boots and enabled him to communicate instantly across a continent or an ocean. The telegraph harnessed this new power, but worked on a principle as ancient as civilization: the coding of information in its most simplified form, on-off pulses that produced audible clicks. Essentially the same principle is used in present day digital computers to process and record information as ones or zeros, which can also be described as yes-no, is-isnt, or present-absent. Basically, says Dan F. Hoth, director of Bell Telephone Laboratories transmission facilities planning center at Holmdel, N. J., the same method of coding is being used today in the Bell Systems new digital transmission systems which represent various Richard Kerdock runs tests on repeaters for new 12 digital transmission system. Fanned-out cables facilitate measurement of simulated transmission flaws, such as cross-(a/k. 20
Text Appearing After Image:
21 kinds of electronic signals — voice, television, facsimile, computer data — as a stream of binary digits, or bits. Since the stream consists simply of on-offpulses, ones or zeros, all signals look and behave exactly alike once they are converted into bits —reduced, in the electronic sense, to the least common denominator. A bit has been described as the amount of information needed to remove the uncertainty between yes or no. While this description refers to an electronic yes or no — the presence or absence of a pulse — it is an instinctive and natural course for modern technology to take. The encoding of information into yes-no, on-off pulses grows from insight into the fundamental process of human reasoning. Things, at least in the logic of the Westernw orld, cannot both be and not be. Aristotle proclaimed that a thing can only be itself, never its

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