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• CCITT Rec. X.32 (11/1988) – INTERFACE BETWEEN DATA TERMINAL EQUIPMENT (DTE) AND DATA CIRCUIT-TERMINATING EQUIPMENT (DCE) FOR TERMINALS ...
• CONTENTS
• 1 Scope
• 2 Functional aspects
  • 2.1 Dial-in and dial-out considerations
  • 2.2 Identification
  • 2.3 Service aspects
  • 2.4 DTE identification methods
  • 2.5 DCE identification methods
  • 2.6 Dial-in-by-the-DTE and dial-out-by-the-PSPDN operation
  • 2.7 DTE service requirement
  • 2.8 Duplex and half-duplex operation
  • 2.9 Identification protocol
  • 2.10 Negotiation of values
• 3 DTE service descriptions
  • 3.1 DTE service attributes
  • 3.2 Summary of DTE services
  • 3.3 Nonidentified DTE service
  • 3.4 Identified DTE service
  • 3.5 Customized DTE service
• 4 Interface characteristics (physical layer)
  • 4.1 X.21 interface
  • 4.2 X.21 bis interface
  • 4.3 V-series interface
• 5 Link access procedure across the DTE/DCE interface
  • 5.1 Introduction
  • 5.2 Link layer address assignment
  • 5.3 Use of exchange identification (XID) frames
  • 5.4 Link set-up disconnection
  • 5.5 Multilink
  • 5.6 Half-duplex operation
• 6 Packet layer
  • 6.1 Scope and field of application
  • 6.2 Use of registration packets for identification of DTE and/or DCE and for conveyance of X.32 optional user ...
  • 6.3 Identification and authentication of the DTE using the NUI selection facility in call set-up packets
• 7 X.32 procedures, formats and facilities
  • 7.1 Identification protocol
  • 7.2 Procedures for X.32 optional user facilities
  • 7.3 Coding of the identification protocol elements and X.32 facilities
  • 7.4 Security grade 2 method
  • 7.5 DCE timer T14
  • 7.6 DCE timer T15
• ANNEX A – Actions taken by the DCE in the roles of questioning and challenged parties for security grade 1 and security grade...
• A.1 Introduction
• A.2 Security grade 1 identification
• A.3 Security grade 2 identification
• ANNEX B – Abbreviations
• APPENDIX I – Implementation of LAPX
• I.1 Introduction
• I.2 Control and status functions
• I.3 Table of transitions between states
• I.4 HDTM/physical layer control and status functions expressed in terms applicable to a modem interface
• APPENDIX II – RSA public key algorithm
• APPENDIX III – Relationship of timer T14 to the different methods of DTE identification