![background image](http://html.mh-extra.com/html/ibm/thinkpad-570/thinkpad-570_user-manual_607438129.webp)
Command
Function
&S1
Keeps DSR off in command mode, on in online
mode.
&T0
Stops the test in progress.
&T1
Runs local analog loopback.
&T6
Runs remote digital loopback test.
&V
Displays the active profiles.
V.42bis commands
Command
Function
&K0
Disables flow control.
&K3
Enables RTS/CTS hardware flow control (data
mode default).
&K4
Enables XON/XOFF software flow control.
&Q0
Asynchronous mode, buffered (same as \N0).
&Q5
Error control mode, buffered (same as \N3).
(default)
&Q6
Asynchronous mode, buffered (same as \N0).
%C0
Disables data compression.
%C1
Enables V.42bis/MNP5 data compression.
\N0
Specifies normal mode (speed buffering) only.
\N1
Specifies direct mode only.
\N2
Specifies MNP mode only.
\N3
Specifies V.42/MNP/normal auto-mode.
(default)
\N4
Specifies V.42 mode only.
\Q0
Disables flow control (same as &K0).
Appendix B. Using modem commands
123
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