Modem Intelligence

• Computer Can Send Commands to Modem

  • Dial a number, including how long to wait, etc.
  • Called intelligent modems

• Hayes Developed the first Command Set

  • Most modems follow the same command set
  • We call them “Hayes compatible”
  • Commands start with “AT”

• Other Standards for Fax Modems

  • Class 1 and Class 2: extensions to Hayes

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