Specifications

Technical Specifications B-1
Appendix B
Technical Specifications
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 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)
V.FC 28.8/26.4/24/21.6/19.2/16.8/14.4 Kbps
asynchronous Trellis Coded Modulation (TCM)
V.32
terbo
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)
HST 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