Chapter 3: AT Commands Reference
December 31, 2007 AT Commands Reference Manual 3-431
The implementation of this parameter is mandatory if V.42 error control or Buffered mode is
provided in the G24. If not, it is optional. G24s which do not implement circuit 106 and/or circuit
133 do not need to support the value 2 for the corresponding subparameter.
The following table shows the <DCE_by_DTE> and <DTE_by_DCE> parameters.
Note: <DCE_by_DTE> and <DTE_by_DCE> of the same value only are supported.
Example
AT+IFC=?
+IFC: (0-3),(0-2)
OK
AT+IFC?
+IFC: 2,2
OK
AT+IFC=2,2
OK
Command
Type
Syntax Response/Action
Set
AT+IFC=[[<DCE_by_DTE>,[DTE_by_DCE>]]] OK
+CME ERROR: <err>
Read
AT+IFC? +IFC:
<DCE_by_DTE>,<DTE_by_DCE>
Test
AT+IFC=? +IFC: (list of supported
<DCE_by_DTE>s, list of supported
<DTE_by_DCE>s)
Table 3-287: <DCE_by_DTE> and <DTE_by_DCE> Parameters
<Parameter> Description
<DCE_by_DTE> 0None
1 DC1/DC3 on circuit 103. Do not pass DC1/DC3 characters to the remote
DCE.
2 Circuit 133 (ready for receiving).
3 DC1/DC3 on circuit 103 with DC1/DC3 characters being passed through to
the remote G24 in addition to being acted upon for local flow control.
4-127 Reserved for future standardization.
Other Reserved for manufacture-specific use.
The default is 2.
DC1 is IA5 1/1. DC3 is IA5 1/3.
<DTE_by_DCE> 0None
1 DC1/DC3 on circuit 104.
2 Circuit 106 (clear to Send/Ready for Sending).
3-127 Reserved for future standardization.
Other Reserved for manufacture-specific use.
The default is 2.
DC1 is IA5 1/1. DC3 is IA5 1/3.
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