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Chapter 4 - Commands
VALUES: n = 0 thru 2
DEFAULT: #F2
DESCRIPTION: #F0 means no fallback when on-line.
#F1 means fallback from 33600 to 4800 bps when on-line
(increments of 2400 bps).
#F2 means fallback to 4800 bps from 33.6K bps/fall
forward if line improves (increments of 2400 bps).
COMMAND: &Fn
VALUES: n = 0, 8 or 9
DEFAULT: &F8
DESCRIPTION: &F loads factory default values from ROM.
&F8 reads factory default values when &F is issued.
&F9 reads parameters stored in nonvolatile memory when
&F is issued.
COMMAND: $Fn
VALUES: n = 0 or 1
DEFAULT: $F1
DESCRIPTION: $F0 means do not fall back to normal connect if CR
received.
$F1 means fall back to normal connect if CR received.
COMMAND: $FCn
VALUES: n = 0 or 1
DEFAULT: $FC1
DESCRIPTION: $FC0 means no transmit of 5 second 2100Hz signal.
$FC1 transmits 5 second 2100Hz signal.
COMMAND: &Gn
VALUES: n = 0, 1 or 2
DEFAULT: &G0
DESCRIPTION: &G0 turns off CCITT guard tones.
&G1 turns on CCITT 550 Hz guard tone.
&G2 turns on CCITT 1800 Hz guard tone (not used on
International models).
COMMAND: Hn
VALUES: n = 0 or 1
DEFAULT: n/a
DESCRIPTION: H0 selects Hang Up (go on hook).
H1 selects Go Off Hook.
COMMAND: $Hn