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  1. Speeds

    Modems are frequently classified by the maximum amount of data they can send in a given unit of time, usually expressed in bits per second (symbol bit/s, sometimes abbreviated "bps") or rarely in bytes per second (symbol … See more

    Overall history

    Modems grew out of the need to connect teleprinters over ordinary phone lines instead of the more expensive leased lines which had previously been used for current loop–based teleprinters and automated telegraphs. … See more

    Dial-up

    A dial-up modem transmits computer data over an ordinary switched telephone line that has not been designed for data use. It was once a widely known technology, mass-marketed globally dial-up internet access. In the 1990s, t… See more

    Leased-line modems

    A leased line modem also uses ordinary phone wiring, like dial-up and DSL, but does not use the same network topology. While dial-up uses a normal phone line and connects through the telephone switching system, and … See more

     
  1. From Baud to Awed: The History of the Modem - Auvik

     
  2. The Sound of dial-up Internet - YouTube

  3. Speed rate of an old school modem Crossword Clue

  4. Any use for old dial up modems? : r/vintagecomputing - Reddit

  5. Are CSU/DSU just old school modems or they just modems? : r/it