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AT Commands
RFM-4002-5015 Rev 3
73
Range
Parameter
Values:
0 = DCD always on
1 = The modem turns on the DCD to indicate the
presence of a connection, and turns off the DCD to
indicate the loss of connection.
DTR Behavior
This parameter determines how the computer responds when the DTR line is
changed from the ON condition to the OFF condition during the online data
state.
Command &D
Action AT&d <setting>
Query AT&v
Range
Parameter
Values:
0 = Modem ignores DTR
1 = If the DTR is turned ON while in online data mode,
the mode returns the command mode and issues the OK
result code. The call remains connected.
2 = If the DTR is turned OFF while in online data mode,
the modem disconnects the call and returns the OK
result code. If DTR is OFF while in command mode, the
modem will not answer an incoming call, regardless of
the setting, S0 (automatic answer).
Restore Factory Default
This command causes the modem to reset all parameters and S-registers to their
factory defined default value. The optional parameter value, if present must be
0.
Command &F