ITU-T Rec. X.38 (1992) G3 FACSIMILE EQUIPMENT/DCE INTERFACE FOR G3 FACSIMILE EQUIPMENT ACCESSING ...
FOREWORD
Preface
1 Procedures for the establishment of a national access information path (AIP) between a G3 facsimile equipment ...
    1.1 Access from a G3 facsimile equipment to an FPAD
        1.1.1 For an equipment connected to the GSTN
        1.1.2 For a directly connected equipment
    1.2 Access from an FPAD to a G3 facsimile equipment
        1.2.1 For an equipment connected to the GSTN
        1.2.2 For a directly connected equipment
    1.3 Manual operation both at the emitting and receiving G3 facsimile equipments
2 Procedures for service initialization between a G3 facsimile equipment and an FPAD
    2.1 Exchange of control information between a G3 facsimile equipment and an FPAD
        2.1.1 Use of ancillary signalling methods
        2.1.2 Ancillary signalling method 1: dual-tone multi-frequency (DTMF) codes
    2.2 Procedures for initialization
        2.2.1 Disconnected (state 0)
        2.2.2 Active link (state 1)
3 Procedures for the exchange of control information between a G3 facsimile equipment and an FPAD
    3.1 General
        3.1.1 FPAD parameters
        3.1.2 FPAD command signals and FPAD service signals
    3.2 Procedures for virtual call control
        3.2.1 Operation at the local G3FE/FPAD interface
        3.2.2 Operation at a remote FPAD/G3FE interface
        3.2.3 General
    3.3 Procedure for FPAD commands
        3.3.1 Procedure for setting and changing the values of FPAD parameters
        3.3.2 Procedure for initializing
        3.3.3 Procedure for selecting address type
        3.3.4 Procedures for reading the values of one or several FPAD parameters
        3.3.5 Procedure for enquiring a virtual call status
    3.4 Formats of FPAD command signals and FPAD service signals
        3.4.1 Formats of FPAD command signals
        3.4.2 Standard formats of FPAD service signals
4 Procedures for the exchange of facsimile image data between a G3 facsimile equipment and an FPAD
    4.1 Facsimile procedure (state 5)
        4.1.1 Substates at an emitting FPAD/G3FE interface
        4.1.2 Substates at a receiving FPAD/G3FE interface
        4.1.3 Procedures for leaving facsimile procedure state
    4.2 Receiving capability notification in DIS or DTC command
    4.3 Non-standard facilities
    4.4 Procedure upon receipt of procedure interrupt command or response
    4.5 Determination of data signalling rate
    4.6 Facsimile image data from the G3 facsimile equipment received by the FPAD
        4.6.1 Non-error correction mode
        4.6.2 Error correction mode (ECM)
    4.7 Delivery of user data to the G3 facsimile equipment
        4.7.1 Non-error correction mode
        4.7.2 Error correction mode (ECM)
    4.8 Data forwarding conditions
        4.8.1 Non-error correction mode
        4.8.2 Error correction mode (ECM)
    4.9 Procedure for the FPAD to indicate to the G3 facsimile equipment a temporary inability to accept additional ...
ANNEX A FPAD command signals and FPAD service signals
ANNEX B FPAD time-outs
ANNEX C State diagrams
ANNEX D Support of non-standard facilities
APPENDIX I Examples of event sequence
APPENDIX II Alphabetical list of abbreviations used in this Recommendation