Rec. ITU-T V.110 (09/1992) SUPPORT OF DATA TERMINAL EQUIPMENTS WITH V-SERIES TYPE INTERFACES BY AN INTEGRATED SERVICES ...
FOREWORD
1 Reference configurations
    1.1 Terminal adaptor reference model
    1.2 Connection types
2 Line signals at S and T reference points
    2.1 Bit rate adaptation of synchronous data signalling rates up to 19.2 kbit/s
    2.2 Rate adaptation of 48 and 56 kbit/s user rates to 64 kbit/s
    2.3 Adaptation for asynchronous rates of up to 19 200 bit/s
    2.4 Flow control
3 Interchange circuits
    3.1 Essential and optional interchange circuits
    3.2 Timing arrangement
    3.3 Circuit 106
    3.4 Circuit 109
    3.5 Electrical/mechanical characteristics of interchange circuits
    3.6 Fault condition on interchange circuits
4 Operating sequence
    4.1 TA duplex operation
    4.2 TA half-duplex operation
    4.3 Automatic calling
5 Network independent clocks
    5.1 Measurement of phase differences
    5.2 Positive/negative compensation
    5.3 Encoding
6 Inband parameter exchange state
7 Testing facilities
ANNEX A Reference configurations
A.1 Introduction
A.2 V.110 terminal adaptor reference model
A.3 Terminal adaption type
A.4 Types of end-to-end connection
ANNEX B Alphabetical list of abbreviations used in this Recommendation
APPENDIX I In-band parameter exchange
I.1 Introduction
I.2 Definitions
I.3 Overview
I.4 Reference configuration
I.5 Procedures
I.6 Coding
I.7 Timer values
I.8 State transition diagrams
APPENDIX II V.25 bis to Q.931 protocol mapping
II.1 General
II.2 Call origination
II.3 Call clearing (Figure II-2/V.110 and Figure II-3/V.110)
II.4 Direct call
II.5 Mapping of Q.931 causes to V.25 bis call failure indications and responses
II.6 Additional information for handling of exception situations