Moxa Technologies G2150I manual Set DCD Signal &C, Set DTR Signal &D, Command syntax AT&Cn

OnCell G2150I AT Command Set V24-V25 Commands

AT+IFC=0,0

OK

Note: 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 through RTS) DCE behavior is as follows:

If the DCE has never detected RTS in the high (or ON) condition since startup, then it ignores RTS (assuming 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 behavior allows the user to use the default settings (hardware flow control) and leave RTS disconnected. 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.

Set DCD Signal: &C

Description: This command controls the Data Carrier Detect (DCD) signal.

G2150O products differ slightly from V25ter Recommendation. DCD signal (“Circuit 1rned ON at the same time the CONNECT message is sent, whereas the specification states the DCD should be turned ON after the CONNECT message was received.

Command syntax: AT&C<n>

Command	Possible responses
AT&C0	OK
Note: DCD always on	Note: Command valid
AT&C1	OK
Note: DCD matches state of the remote	Note: Command valid
modem’s data carrier

Defined values: <n>

0DCD always on

1DCD matches state of the remote modem’s data carrier

Set DTR Signal: &D

Description: This command controls the Data Terminal Ready (DTR) signal

Command syntax: AT&D<n>

Command	Possible responses
AT&D0	OK
Note: The DTR signal is ignored	Note: Command valid

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