US Robotics 56K Series Manual page 76

&H3 Hardware and software
flow control
&In 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
70
&Kn Enables/disables data
compression
&K0 Data compression
disabled
&K1 Auto
enable/disable
&K2 Data compression
enabled
&K3 MNP5 compression
disabled
&Mn Sets Error Control (ARQ) for
connections at 1200 bps and
higher
&M0 Normal mode, error
control disabled
&M1 Reserved
&M2 Reserved
&M3 Reserved