Rec. ITU-T V.120 (09/1992) SUPPORT BY AN ISDN OF DATA TERMINAL EQUIPMENT WITH V-SERIES TYPE INTERFACES WITH PROVISION ...
FOREWORD
1 Scope
2 Application
    2.1 General
    2.2 Connectivity
    2.3. Protocol architecture
    2.4 Operation over restricted transport capabilities
3 Terminal adaption protocol
    3.1 Formats
    3.2 Procedures
4. Data link control protocol
    4.1 Data link control modes of service
    4.2 Data link connection verification procedures
5 Protocol specifications for operation over Frame Mode Bearer service
    5.1 Physical protocol
    5.2 Data link protocol
    5.3 Signalling protocol
6 Protocol specifications for operation over Circuit Mode Bearer service
    6.1 Physical protocol
    6.2 Data link core protocol
    6.3 Signalling protocols
7 Application of terminal adaption protocol to terminal adaptor functions
    7.1 Clock synchronization
    7.2 Asynchronous mode operation
    7.3 Protocol sensitive synchronous mode operation
    7.4 Bit transparent mode operation
ANNEX A List of variables
ANNEXE B Alphabetical list of abbreviations used in this Recommendation
APPENDIX I TE1 application
I.1 Asynchronous mode operation
I.2 Synchronous mode operation
I.3 Bit transparent mode operation
I.4 TE1 control state variable processing
APPENDIX II Mapping of interface at R reference point circuits to control state information
II.1 Commonly supported interface leads
II.2 Control procedures
APPENDIX III Clock synchronization