• CCITT Rec. X.30 (11/1988) – SUPPORT OF X.21, X.21 bis AND X.20 bis BASED DATA TERMINAL EQUIPMENTS (DTEs) BY AN INTEGRATED SERVICES DIGITAL ...
  • CONTENTS
  • 1 Reference configurations
    • 1.1 Customer access configuration
    • 1.2 Network configuration
    • 1.3 Interworking situation
  • 2 Terminal adaption functions
    • 2.1 Terminal adaption functions for DTEs conforming to X.1 user classes of service 3 to 6
    • 2.2 Terminal adaption functions for DTEs conforming to X.1 user class of service 7
    • 2.3 Terminal adaption functions for DTEs conforming to X.1 user class of service 19
    • 2.4 Terminal adaption functions for DTEs conforming to X.1 user classes of service 1 and 2 (asynchronous operation)
  • 3 Test loops
    • 3.1 Test loop reference configuration
    • 3.2 Test loop characteristics
    • 3.3 Loop activation/deactivation mechanism
    • 3.4 Coding of activation/deactivation control message
  • ANNEX A – SDL diagrams
    • A.1 General
    • A.2 Some remarks about the formal description
  • A.1 General
  • A.2 Some remarks about the formal description
  • APPENDIX I – Universal terminal adaptor
  • I.1 User rate identification
  • I.3 Loss of alignment/recovery
  • I.4 Ready for data alignment
  • APPENDIX II – Inslot identification of intermediate bit rate
  • II.1 Identification of intermediate rate
  • II.2 Restitution of the intermediate rate
  • II.3 User rate identification
  • Reference