Robotics COURIER Technical Information Seite 126

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B-2 Courier I-modem Getting Started Guide
Modulation
This modulation Supports
x2 Up to 56 kbps downstream and V.34 speeds upstream
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 TCM
V.32 terbo 21.6/19.2/16.8/14.4/12 kbps; 9600/7200 bps asynchronous
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 TCM and QAM; 4800 bps
asynchronous, asymmetrical, 450 bps back channel with
automatic handshake adjustment to 300 bps QAM.
ITU-T V.32 bis 14.4/12 kbps; 9600/7200 bps asynchronous TCM; 4800 bps
asynchronous QAM
ITU-T V.32 9600 bps asynchronous, TCM; 4800 bps asynchronous, QAM
ITU-T V.22 bis 2400 bps asynchronous, QAM
Bell 212A 1200 bps (also V.22) asynchronous, Differential Phase Shift
Keying (DPSK)
ITU-T V.23 1200 bps asymmetrical with 75 bps back channel with
Frequency Shift Keying (FSK), used by some U.K. and
European phone systems.
Bell 103 300 bps (ITU-T V.21 optional) asynchronous, Frequency Shift
Keying (FSK)
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