Chapter 1 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
12
Sr S-Register
Control
Description:
Use this command to view or change an S-register. S-registers contain parameters
used by the modem. This command has two forms, one to show the contents of the
register and the other to change the contents of the register. Some registers are read
only and are not affected by the
S<register number>=<value>
command. Each
register has a specific function.
Syntax:
ATS<register number>=<value>
Sets the contents of the register to <value> if the
register is not read only.
ATS<register number>?
Displays register contents.
Default:
None
Result Codes:
OK
if <register number> is a valid register.
ERROR
if <register number> is not a valid register.
T
Select Tone Dialing
Description:
Configures the modem for DTMF (touch-tone) dialing. All subsequent
D<dial string>
commands use tone dialing until either the
P
command or a pulse dial modifier is
received by the modem. Tone dialing is the default setting. This command does not
use parameters and generates an ERROR result code when parameters are
attached to the command.
Syntax: ATT
V
Result Code Format
Description:
Controller-based modems generate result codes using one of two formats. Verbose
mode generates result codes in the familiar text formats using words. Numerical
mode generates result codes as a number. Each result codes has a number
assigned to it.
Use this command to switch between numerical and verbose modes.
Call progress and negotiation progress messages are affected by this command.
Syntax: ATV<value>
Values:
0
Displays result codes as digits (terse response).
1
Displays result codes as words (verbose response).
Default: 1
Result Codes: OK
if <value> = 0 to 1.
ERROR
if <value>
≠
0 to 1.
W
Result Code Options
Description:
Use this command to select the modem's CONNECT message options.
Syntax: ATW<value>
Values:
0
CONNECT result code reports DTE receive speed; disables protocol result
codes.
1
CONNECT result code reports DTE receive speed; enables protocol result
codes.
2
CONNECT result code reports DCE receive speed; enables protocol result
codes.
Default: 2
Result Codes: OK
if <value> = 0 to 2.
ERROR
if <value>
≠
0 to 2.
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