command	Function of command
&K0	Disable flow control
&K3	Enable RTS/CTS hardware flow control (data mode default)
&K4	Enable XON/XOFF software flow control
&K5	Enable transparent XON/XOFF software flow control
&K6	Enable both RTS/CTS and XON/XOFF flow controls (fax mode default)
&Q0	Direct mode data link only (same as \N1)
&Q5	V.42 data link with fall-back options
&Q6	Normal mode (speed buffering) data link only (same as \N0)
%C0	Data compression disabled
%C1	MNP 5 data compression enabled only
%C2	V.42bis data compression enabled only
%C3	V.42bis/MNP 5 data compression’s enabled
\A0	64-character MNP block size
\A1	128-character MNP block size
\A2	192-character MNP block size
\A3	256-character MNP block size
\Bn	Modem transmits break signal with duration n x 0.1 seconds (n=0-9, default is 3)
\G0	DCE flow control disabled
\G1	DCE flow control enabled
\Kn	Set break control, where n=0-5 (default is 3)
\N0	Normal mode (speed buffering) only
\N1	Direct mode only
\N2	V.42 & MNP mode only
\N3	V.42/MNP/Normal automode
\N4	V.42 mode only
\N5	MNP mode only