User guide

Developers guidelines | AT commands
49 June 2010
AT+IFC Cable interface DTE-DCE local flow control
AT+ICF Cable interface character format (ver. 2)
2 Disconnect and switch to offline command mode
Description: Defines the flow control between the modem and the computer when in
online data mode. No flow control is enabled in any of the command
modes.
Set command: AT+IFC=[<by_te>,[<by_ta>]]
Read command: AT+IFC? Displays the current <by_te> and <by_ta> settings.
Read command
response: +IFC: <by_te>,<by_ta>
Test command: AT+IFC=? Shows if the command is supported.
Test command
response: +IFC: (list of supported <by_te>s),(list of supported <by_ta>s)
Parameters:
<by_te>:
<by_te> Description
0 No flow control on DTE
1 Xon/Xoff flow control on DCE. Control characters
are removed by the DCE interface
2 RTS flow control on DCE. Default value
3 Xon/Xoff flow control on DCE. Control characters
are passed to the remote DCE/DTE
<DTE_by_DCE>:
<DTE_by_DCE> Description
0 No flow control on DCE
1 Xon/Xoff flow control on DTE
2 CTS flow control on DCE. Default value
Description: This extended-format compound parameter is used to determine the local
serial port start/stop (asynchronous) character framing that the DCE will
use while accepting DTE commands and while transmitting information
text and result code, if this is not automatically determined. AT+IPR=0
forces +ICF=0 (see AT+IPR).
Note: Only applicable for RS-232, dummy command on IrDA and USB.
Set command: AT+ICF=[<format>[,<parity>]
Read command: AT+ICF? Displays the current <format> and <parity> settings.
Read command
response: +ICF: <format>,<parity>
<value> Description