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Standards Compatibility
The Courier uses multiple standard data communications
protocols and is also compatible with many nonstandard
schemes.
NOTE: The International Telecommunication Union (ITU-T)
was formerly the International Telegraph and Telephone
Consultative Committee (CCITT).
Modulation
ITU-T V.34
V.FC
V.32terbo
HST
Technical Specifications
33.6/31.2/28.8/26.4/24/21.6/19.2/16.8/14.4/12
Kbps; 9600/7200/4800 bps asynchronous Trellis
Coded Modulation (TCM)
28.8/26.4/24/21.6/19.2/16.8/14.4 Kbps
asynchronous Trellis Coded Modulation (TCM)
21.6/19.2/16.8/14.4/12 Kbps; 9600/7200 bps
asynchronous Trellis Coded Modulation (TCM);
4800 bps asynchronous Quadrature Amplitude
Modulation (QAM)
16.8/14.4/12 Kbps; 9600/7200 bps asynchronous,
asymmetrical, 450 bps back channel with automatic
handshake adjustment to 300 bps Trellis Coded
Modulation (TCM) and Quadrature Amplitude
Modulation (QAM); 4800 bps asynchronous,
asymmetrical, 450 bps back channel with automatic
Technical Specifications
Appendix B
B-1
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