3Com 3C900B Installation And Operating Instructions Manual page 127

&Gn Sets Guard Tone.
&G0 No guard tone, U.S.
and Canada
&G1 550 Hz guard tone,
some European
countries, requires B0
setting.
&G2 1800 Hz guard tone,
U.K., requires B0
setting.
&Hn Sets Transmit Data (TD)
flow control (see also &Rn).
&H0 Flow control disabled
&H1 Hardware flow
control, Clear to Send
(CTS)
&H2 Software flow control,
XON/XOFF
T Q R
ECHNICAL UICK EFERENCE
&In
&Kn Enables/disables data
&H3 Hardware and
software flow control
Sets Receive Data (RD)
software flow control (see
also &Rn).
&I0 Software flow control
disabled
&I1 XON/XOFF signals to
your modem and
remote system
&I2 XON/XOFF signals to
your modem only
compression.
&K0 Data compression
disabled
&K1 Auto enable/disable
&K2 Data compression
enabled
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