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4 AT Commands, S-Registers, and Result Codes
28
MultiModemZPX 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.
Command: &W
n
Store Current Configuration
Values: n = 0, 1
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.
&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, 1
x = Dialing command string
Default: None
Description: Stores dialing command x in memory location y. Dial the
stored number using the command ATDS=n.
Command: &&S Speaker Codec Loopback
Values: n/a
Description: Provides a loopback from the microphone to the speaker. For
testing and debugging only.
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.