Specifications

Chapter 2 - AT Commands, S-Registers and Result Codes
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COMMAND: $SBn
VALUES: n = speed
DEFAULT: $SB115200 bps
DESCRIPTION : $SB300 selects 300 bps at serial port.
$SB1200 selects 1200 bps at serial port.
$SB2400 selects 2400 bps at serial port.
$SB4800 selects 4800 bps at serial port.
$SB9600 selects 9600 bps at serial port.
$SB19200 selects 19,200 bps at serial port.
$SB38400 selects 38,400 bps at serial port.
$SB57600 selects 57600 bps at serial port.
$SB115200 selects 115200 bps at serial
port.
COMMAND: &SFn
VALUES: n = 0 or 1
DEFAULT: &SF0
DESCRIPTION : &SF0 selects DSR follows CD.
&SF1 selects DSR independent.
COMMAND: &Sn
VALUES: n = 0, 1 or 2
DEFAULT: &S1
DESCRIPTION : &S0 forces Data Set Ready On.
&S1 lets Data Set Ready act normally.
&S2 Data Set Ready drop is regulated by
S24 on disconnect.
COMMAND: T
VALUES: n/a
DEFAULT: Tone Dial
DESCRIPTION : Modem will tone-dial numbers following the T.