USRobotics V.34 - Manual (Page 232)

COURIER HIGH SPEED MODEMS
K-8 Technical Specifications
Originate Mode: 1875 Hz
Answer Mode: 1875 Hz
Originate Mode: 1920 Hz
Answer Mode: 1920 Hz
USR-V.32 terbo/V.32 bis/V.32
Originate Mode: 1800 Hz
Answer Mode: 1800 Hz
USR-HST, 450 bps back channel
Originate Mode: 375 Hz
Answer Mode: 1800 Hz
USR-HST, 300 bps back channel
Originate Mode: 350 Hz
Answer Mode: 1800 Hz
V.23
Originate Mode:
Mark: 390 Hz
Space: 450 Hz
Answer Mode:
Mark: 1300 Hz
Space: 2100 Hz
V.22 bis, V.22, Bell 212A
Originate Mode: 1200 Hz
Answer Mode: 2400 Hz
Bell 103
Originate Mode:
Mark: 1270 Hz
Space: 1070 Hz
Answer Mode:
Mark: 2225 Hz
Space: 2025 Hz