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PORTABLE USB MODEM
Command: &Kn Flow Control Selection
Values: n=0, 3, or 4
Defaults: 3
Description: &K0 Disable flow control.
&K3 Enable CTS/RTS hardware flow control.
&K4 Enable X-ON/X-OFF software flow control.
Command: &Qn Asynchronous Communications Mode
Values: n=0, 5, 6, 8, or 9
Default: 5
Description: &Q0 Asynchronous with data buffering. Same as \N0.
&Q5 Error control with data buffering. Same as \N3.
&Q6 Asynchronous with data buffering. Same as \N0.
&Q8 MNP error control mode. If MNP error control is
not established, the modem falls back according to
the setting in S36.
&Q9 V.42 or MNP error control mode. If neither error
control is established, the modem falls back
according to the setting in S36.
Command: &Sn Data Set Ready (DSR) Control
Values: n=0 or 1
Default: 0
Description: &S0 Force DSR always high (on).
&S1 Let DSR go high only during a connection.
Command: &Tn V.54 Test Commands
Values: n=0, 1, 3 or 6
Default: None
Description: &T0 Abort. Stop any test in progress.
&T1 Local analog loopback test.
&T3 Local digital loopback test.
&T6 Remote digital loopback test.
NOTE
To stop a test, you must use the escape sequence (+++AT) before typing
AT&T0.