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Appendix
MT5634ZPX-PCI 77
Fallback In adverse line conditions, the modem falls
back from its current operating speed to the
next reliable slower speed in 2400 bps
decrements (V.34 mode). If conditions
improve, the modem falls forward to the
fastest reliable speed in 2400 bps increments.
In V.90/K56flex mode, modem falls back and
falls forward in increments of 2000 bps.
Modes of Operation Full-duplex operation over dial-up lines,
automatic dialing, automatic or manual
answer.
Flow Control Software (XON/XOFF), hardware (RTS/CTS)
Intelligent Features Fully AT command compatible, autodial,
redial, pulse or tone dial, dial pauses, call
status display, auto-parity and data rate
selection, keyboard-controlled modem
options, and nonvolatile memory and on-
screen displays for modem parameters.
Command Buffer 40 characters
Data Modulations FSK at 300 bps, DPSK at 1200 bps, QAM at
2400, 4800, and 9600 bps (non-trellis), QAM
with trellis-coded modulation (TCM) at 9600,
12,000, 14,400, 16,800, 19,200, 21,600,
24,000, 26,400, 28,800, 31,200, 33,600 and
56,000 bps
Fax Modulations V.21 CH2: FSK at 300 bps
V.27ter: DPSK at 4800 and 2400 bps
V.29: QAM at 9600 and 7200 bps
V.17: TCM at 14400, 12000, 9600, and 7200
bps
Carrier Frequencies: 1600, 1646, 1680, 1800, 1829, 1867,
V.34/V.90/K56flex 1920, 1959, 2000 Hz
Carrier Frequencies: 1800 Hz