X.29

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X.29 may refer to:

  • X.29, the ITU-T standard, approved by ISO, specifying procedures for the exchange of control information and user data between a Packet Assembler/Disassembler, or PAD, and a remote packet-mode DTE, or Data Terminal Equipment. It defines the level 4 (or session layer in the OSI model) for X.25 communications, specifically call establishment and X.3 parameter negotiation.
  • Character-mode DTEs are often referred to as X.29 terminals.
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