US Robotics COURIER User Manual page 205

COURIER HIGH SPEED MODEMS
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V.23
Originate Mode:
Mark: 390Hz
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Space:
450Hz
Answer Mode:
Mark: 1300 Hz
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Space: 2100 Hz
V.22 bis, V.22, Bell 212A
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Originate Mode: 1200 Hz
Answer Mode: 2400 Hz
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Bell 103
Originate Mode:
Mark: 1270 Hz
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Space: 1070 Hz
Answer Mode:
Mark: 2225 Hz
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Space: 2025 Hz
V.21
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Originate Mode:
Mark: 980Hz
Space: 1180 Hz
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Answer Mode:
Mark: 1650 Hz
Space: 1850 Hz
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RECEIVER CARRIER FREQUENCIES
USR-HST, 450 bps back channel
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Originate Mode: 1800 Hz
Answer Mode:
375 Hz
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USR-HST, 300 bps back channel
Originate Mode: 1800 Hz
Answer Mode: 350Hz
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V.32 bis
Originate Mode: 1800 Hz
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Answer Mode: 1800 Hz
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H-6 Technical Specifications
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