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HUAWEI MG323 GSM M2M Module
AT Command Interface Specification
Execution
command
Function
Response
Parameter description
<value>: integer; AT&C is equivalent to AT&C0.
4.3 AT&D - Command for Setting the DTR Usage State
The AT&D command sets the result returned by the TA in data service state when the
DTR circuit is disabled from enabling state.
Execution
command
Function
Response
Parameter description
<value>: integer; AT&D is equivalent to AT&D0.
4.4 AT&S – Command for Setting the DSR Usage State
The AT&S command sets the status of the DSR line according to different
communication status of the ME.
Execution
command
Function
Response
Issue 02 (2010-11-23)
AT&C[<value>]
Sets the relation between the status of the DCD line and signal
detection of the remote receiving line.
<CR><LF>OK<CR><LF>
0: enables the DCD line.
1 (default value): The DCD line is enabled only when data carrier exists.
AT&D[<value>]
Sets the result returned by the TA in data service state when the DTR
circuit is disabled from enabling state.
<CR><LF>OK<CR><LF>
0: The TA ignores the status of the DTR circuit.
1: enters the command mode while holding the current data conversation.
2 (default value): releases the data conversation and enters the command mode.
When DTR=OFF, automatic response is disabled.
AT&S[<value>]
Sets the status of the DSR line.
<CR><LF>OK<CR><LF>
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Commands for Serial Port Control
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