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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   facsimile
   fax
      <communications> ("fax") A process by which fixed graphic
      material including pictures, text, or images is scanned and
      the information converted into electrical signals which are
      transmitted via telephone to produce a paper copy of the
      graphics on the receiving fax machine.
      Some modems can be used to send and receive fax data.  V.27
    ter and V.29 protocols are used.
      [Details?  Standards?]
      (2004-07-26)