US Robotics COURIER - APPENDIX H. TECHNICAL SPECIFICATIONS; USRobotics High Speed Technology (HST) Specs; CCITT V.32 bis Specifications

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COURIER HIGH SPEED MODEMS
APPENDIX
H. TECHNICAL SPECIFICATIONS
USROBOTICS HIGH SPEED TECHNOLOGY (HST)
16.8K, 14.4K, 12K, 9600, 7200 bps, synchronous/ asynchronous,
asymmetrical, 450 bps back channel with automatic handshake
adjustment to 300 bps, Trellis Coded Modulation (TCM),
Quadrature Amplitude Modulation (QAM)
4800 bps, synchronous/ asynchronous, asymmetrical, 450 bps
back channel with automatic handshake adjustment to 300 bps,
Quadrature Amplitude Modulation (QAM)
CC/TT V.32 BIS
14.4K. 12K, 9600, 7200 bps, synchronous/ asynchronous, Trellis
Coded Modulation (TCM)
4800 bps, synchronous/ asynchronous, Quadrature Amplitude
Modulation (QAM)
ADDITIONAL COMPATIBILITY FEATURES
CCITT V .25 2100 Hz tone
CCITT V.23, 1200 bps, asymmetrical (1200/75 bps), Frequency
Shift Keying (FSK)
CCITT V.22 bis, 2400 bps, synchronous/ asynchronous,
Quadrature Amplitude Modulation (QAM)
CCITT V.22, 1200 bps, synchronous/ asynchronous, Differential
Phase Shift Keying (DPSK)
Bell 212A, 1200 bps, synchronous/ asynchronous, Differential
Phase Shift Keying (DPSK)
Bell 103, 300/110 bps, asynchronous, Frequency Shift Keying
(FSK)
CCITT V.21, 300 bps, asynchronous, Frequency Shift Keying
(FSK)
USRobotics HST error control protocol, asymmetrical mode, at
16.8K, 14.4K, 12K, 9600, 7200, 4800 bps, 450/300 bps back
channel
Technical Specifications H-1