Chapter 4 - AT Commands, S-Registers and Result Codes
MT4X56USB 45
Command: &WnStore Current Configuration
Values: n = 0
Default: None
Description: &W0 Stores current modem settings in nonvolatile memory and causes them to be loaded at power-on
or following the ATZ command instead of the factory defaults. 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 following the ATZ command.
Command: &YnSelect Stored Configuration for Hard Reset
Values: n = 0
Default: 0
Description: &Y0 Select stored configuration 0 on power-up. (For backward compatibility with some software.)
&Y1 Not supported—responds ERROR.
Command: &Zy=x Store Dialing Command
Values: y = 0–3 (callback security disabled) or 0–29 (callback security enabled)
x = Dialing command
Default: None
Description: Stores dialing command x in memory location y. Dial the stored number using the command
ATDS=y. See also the #CBSn command. For callback security options, see Chapter 6.
Command: \AnSelect 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.
Command: \BnTransmit Break
Values: n = 0–9 in 100 ms units
Default: 3
Description: In non-error-correction mode only, sends a break signal of the specified length to a remote
modem. Works in conjunction with the \K command.
Command: \GnModem Port Flow Control
Values: n = 0
Default: 0
Description: \G0 Returns an OK for backward compatibility with some software.
\G1 Not supported—responds ERROR.
Command: \JnData Buffer Control
Values: n = 0
Default: 0
Description: \J0 Enable data buffer—serial port speed is independent of connect speed.
\J1 Disable data buffer—serial port speed is forced to the line speed.