4 AT Commands, S-Registers, & Result Codes
26
MultiModemZBA-V-V92 User Guide
Command: &S
n
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: &T
n
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: 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 se-
curity settings if callback security is enabled. If the setup pass-
word has been entered, it also displays the callback security
passwords.
Command: &W
n
Store Current Configuration
Values:
n
= 0, 1
Default: 1
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.
&W1 Clears user default settings from nonvolatile memory and
causes the factory defaults to be loaded at power-on or follow-
ing the ATZ command.
Command: &Z
n=x
Store Dialing Command
Values:
n
= 0–3 (callback security disabled) or 0–29 (callback security
enabled)
x
= Dialing command string
Default: None
Description: Stores dialing command
x
in memory location
y
. Dial the stored
number using the command ATDS=
n
. See also the #CBS
n
command. For callback security options, see Chapter 6.
Command: \A
n
Select Maximum MNP Block Size
Values:
n
= 0, 1, 2, or 3
Default: 3
Description: \A0 64-character maximum.
\A1 128-character maximum.
\A2 192-character maximum.
\A3 256-character maximum.