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