facsimile machine

technology
Also known as: fax machine

Learn about this topic in these articles:

development

  • Fax machines send and receive information using a telephone line.
    In fax

    Common fax machines are designed to scan printed textual and graphic material and then transmit the information through the telephone network to similar machines, where facsimiles are reproduced close to the form of the original documents. Fax machines, because of their low cost and their reliability,…

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  • White House Telegraph Room, 1898
    In telegraph: The end of the telegraph era

    …virtually replaced by the digital fax machine. In many offices, fax machines and e-mail began to replace other types of communication, including telegrams, TWX, Telex, and, in many cases, the postal service. In the face of changing technology, the Western Union Telegraph Company was reorganized as the Western Union Corporation…

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modems

  • External modem for use with a personal computer.
    In modem

    computers, facsimile transmission between fax machines, or the downloading of audio-video files from a World Wide Web server to a home computer.

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run-length codes and data transmission

  • Block diagram of a digital telecommunications system.
    In telecommunication: Run-length codes

    …of long runs is the fax machine. A fax machine works by scanning a document and mapping very small areas of the document into either a black pixel (picture element) or a white pixel. The document is divided into a number of lines (approximately 100 per inch), with 1,728 pixels…

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Related Topics:
telegraph
fax

TelAutograph, short-line telegraph used to communicate handwriting and sketches. At the transmitter the motion of the pen or stylus traces out the material to be transmitted, and this motion is converted into electrical signals that are transmitted to the receiver. A pen or stylus at the receiver traces out the same motions as those of the transmitting pen, thus reproducing the writing or sketch. The TelAutograph was invented by Elisha Gray in the United States about 1895 and almost simultaneously in England by A.C. Cowper.

This article was most recently revised and updated by Robert Curley.