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CHAPTER 5: AT Commands, S-Registers, and Result Codes
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
DSR is always high (on).
&S1
DSR goes high only during a connection.
Command:
&Tn
V.54 Test Commands
Values:
n = 0, 1, 3 or 6
Default:
None
Description:
&T0
Abort. Stops any test in progress.
&T1
Initiates local analog loopback test.
&T3
Initiates local digital loopback test.
&T6
Initiates remote digital loopback test.
Note that to stop a test, you must use the escape
sequence (+++AT) before typing &T0.
Command:
&V
Display Current Settings
Values:
n/a
Description:
Displays the active modem settings, including the
callback security settings if callback security is
enabled. If the setup password has been entered, it
also displays the callback security passwords.
Command:
&Wn
Store Current Configuration
Values:
n = 0
Default:
None
Description:
&W0
Stores current modem settings in nonvolatile
memory and causes them to be loaded in place of
the factory defaults at power-on or following the ATZ
command. See also the &F command.