Serial Interface Control Commands; At&C Set Dcd Function Mode; At&D Set Dtr Function Mode - Quectel EC25 Command Manual

3

Serial Interface Control Commands

3.1. AT&C Set DCD Function Mode
The command controls the behavior of the UE‟s DCD (data carrier detection) line.
AT&C Set DCD Function Mode
Execution Command
AT&C[<value>]
Maximum Response Time
Reference
V.25ter
Parameter
<value> 0
1
3.2. AT&D Set DTR Function Mode
The command determines how the UE responds if DTR line is changed from low to high level during data
mode.
AT&D Set DTR Function Mode
Execution Command
AT&D[<value>]
Maximum Response Time
EC25&EC21_AT_Commands_Manual
Response
This parameter determines how the state of circuit 109(DCD)
relates to the detection of received line signal from the distant
end.
OK
300ms
DCD line is always ON
DCD line is ON only in the presence of data carrier
Response
This parameter determines how the TA responds when circuit
108/2 (DTR) is changed from low to high level during data
mode.
OK
300ms
LTE Module Series
EC25&EC21 AT Commands Manual
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