Westermo GD-01 - Manual (Page 117)

117 6196-2220
+IFC – DTE-DCE local flow control
Description:
This command is used to control the operation of local flow control between the DTE
and DCE.
Syntax:
AT+IFC=<DCE_by_DTE>,<DTE_by_DCE>
Command example Possible responses Note
AT+IFC? +IFC: 2,2 Current values
OK
AT+IFC=? +IFC: (0,2),(0,2) Possible values
OK
AT+IFC=0,0 OK New values
Defined values:
<DCE_by_DTE>
0: none (supported)
1: Xon/Xoff local circuit 103 (not supported)
2: RTS (supported)
3: Xon/Xoff global on circuit 103 (not supported)
IMPORTANT NOTE:
When this parameter is set to 2 (DTE invokes flow control throught RTS)
DCE behaviour is as follows:
If the DCE has never detected RTS in the high (or ON) condition since startup then it
ignores RTS as it assumes that this signal is not connected. As soon as the DCE detects
RTS high the signal acts on it.Therefore subsequent RTS transition to OFF will prevent
the DCE from sending any further data in both online and offline modes.This behaviour
allows the user to use the default settings (hardware flow control) and leave RTS discon-
nected. In the case where RTS is connected and is high at least once, it acts on the DCE.
< DTE_by_DCE >
0: none (supported)
1: Xon/Xoff circuit 104 (not supported)
2: CTS (supported)
When this parameter is set to 0 (none) then CTS is kept high all the time.
B A C K