CONTENTS

 1     Scope
 2     References
 3     Definitions
 4     Operational requirements
 5     Connecting in text telephone mode including procedures for interworking with the installed base of existing text telephones
        5.1     Automoding originating
        5.2     Automoding answering
        5.3     Automoding monitor mode
 6     Multi-mode text telephony
        6.1     Simultaneous Voice and Text telephony (SVT)
Annex A – 5-bit operational mode
        A.1     Mode of operation
        A.2     Modulation
        A.3     Probe
        A.4     Character conversion
Annex B – DTMF operational mode
        B.1     Mode of operation
        B.2     Character conversion
Annex C – EDT operational mode
        C.1     Mode of operation
        C.2     Modulation
        C.3     Characters in the EDT mode
Annex D – Bell 103 mode
        D.1     Mode of operation
        D.2     Modulation
Annex E – V.23 Videotex terminals
        E.1     Minitel terminals
                  E.1.1     Mode of operation
                  E.1.2     Minitel "Dialogue" terminal
                  E.1.3     Minitel "Normal" terminal
        E.2     Prestel terminals
Annex F – V.21 text telephone mode
        F.1     Mode of operation
        F.2     Modulation
        F.3     Channel selection
        F.4     Character code and framing
        F.5     Presentation control
        F.6     Usage conventions
Annex G – V.18 text telephone mode
        G.1     Mode of operation
        G.2     Presentation protocol for V.18 mode
        G.3     Framing and transmission
Appendix I – Representative ordering of automoding
Appendix II – Recommended common procedures for terminals using the V.18 DCE
       II.1     Line status display
       II.2     Connect mode
Appendix III – Connection procedures for terminals including V.18 functionality
      III.1     V.18 connection procedures without V.8 bis
      III.2     V.8 bis connection procedures