+CMD?
To test if a particular command is supported, along with the range of values it supports,
use the TEST command:
+CMD=?
An extended command must be terminated with a semicolon if another command follows
it in the same command line. The following table describes the extended AT
configuration commands.
Table 5: Extended AT Configuration Commands Table
Command
Description
+IFC
TE2-MT2 Local Flow Control.
This extended-format compound parameter is used to control the operation
of local flow control between the TE2 and the MT2. The format is:
AT+IFC=
<DCE_by_DTE>,<DTE_by_DCE>
Where:
<DCE_by_DTE>
Specifies the method to be used by the DTE to
control the flow of received data from the DCE.
<DTE_by_DCE>
Specifies the method to be used by the DCE to
control the flow of transmitted data from the DTE.
The valid numeric variables for the
+IFC
command are as follows:
0
No Flow Control
1
Xon/Xoff
2
Hardware
By default, the modem is set up as
AT+IFC=2,2
to allow hardware flow
control in both directions.
+IPR
Fixed Rm Rate.
This numeric extended-format parameter specifies the data rate at which
the MT2 will accept commands, in addition to 1200bps or 9600bps (as
required in EIA/TIA-602). It may be used to select operation at rates at
which the MT2 is not capable of automatically detecting the data rate
being used by the TE2. Rm default rates set at 115.2Kbps.
+ICF
Local RS-232 Interface Character Framing.
This parameter determines the character framing used at the local RS-232
interface. The syntax is:
AT+ICF=
<format>,<parity>
Where:
<format> is a single digit and determines the number of data bits, the
presence of a parity bit, and the number of stop bits in the start-stop frame
according to the following values:
<format>
Meaning
1
8 Data, 2 Stop
2
8 Data, 1 Parity, 1 Stop
3
8 Data, 1 Stop
<parity> is a single digit and determines how the parity bit is generated
and checked, if present, according to the following values:
<parity> Meaning
0
Odd
1
Even
