Chapter 1 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
29
+GMR Revision
Request
Description:
Displays the version of the modem code.
Syntax:
AT+GMR? or AT+GMR=?
Reports
:
+GMR?
Reports current or selected options.
+GMR=?
Reports
supported
options.
Result Code:
OK
+IFC
DTE-DCE Local Flow Control
Description:
Use this command to select the local flow control method. The input parameters of
the
+IFC
command overwrite the settings of the
\Q
and
\X<value>
commands. The
reverse is also true. By modifying the settings of the
\Q
and
\X<value>
commands,
the
+IFC
command parameters are overwritten.
Syntax: AT+IFC=<DCE_by_DTE>,<DTE_by_DCE>
Values:
+IFC=0,0
No flow control.
+IFC=1,1
Software flow control.
+IFC=2,2
Hardware flow control. (Default)
Reports
:
+IFC?
Reports current or selected options.
+IFC=?
Reports
supported
options.
Result Codes:
OK
ERROR
+ILRR
DTE-DCE Local Rate Reporting
Description:
Use this command to display or hide the local rate report result code. If the rate
report is enabled, the reported <rate> is the current DTE-DCE rate. The rate report is
transmitted after any modulation, error control, or data compression reports, and
before the final result code (e.g., CONNECT).
Syntax: AT+ILRR=<value>
Values:
0
Disables the local rate report. (Default)
1
Enables the local rate report.
Reports
:
+ILRR? Reports
current
or selected options.
+ILRR=?
Reports
supported
options.
Result Codes:
OK
ERROR
+IPR
Fixed DTE Rate
Description:
Use this command to set the DTE to DCE transmission rate. There are twelve fixed
transmission rates used by the DTE to communicate with the DCE. These commands
select one of the predefined transmission rates. If a rate is entered which is not
supported, the transmission rate defaults to the next lower rate.
Syntax: AT+IPR=<DTE
rate>
Values:
+IPR=0
Automatic rate detection. (Default)
+IPR=110
100
bits/s
+IPR=300
300
bits/s
+IPR=600
600
bits/s
+IPR=1200
1200bits/s
+IPR=2400
2400
bits/s
+IPR=4800
4800
bits/s
+IPR=9600
9600
bits/s
+IPR=14400
14400
bits/s
+IPR=19200
19200
bits/s
+IPR=38400
38400
bits/s
+IPR=57600
57600
bits/s
+IPR=115200
115200
bits/s
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