HUAWEI MG323 GSM M2M Module
AT Command Interface Specification Commands for Serial Port Control
Issue 02 (2010-11-23) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd. 38
Execution
command
AT&C[<value>]
Function Sets the relation between the status of the DCD line and signal
detection of the remote receiving line.
Response <CR><LF>OK<CR><LF>
Parameter description
<value>: integer; AT&C is equivalent to AT&C0.
z 0: enables the DCD line.
z 1 (default value): The DCD line is enabled only when data carrier exists.
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
AT&D[<value>]
Function Sets the result returned by the TA in data service state when the DTR
circuit is disabled from enabling state.
Response <CR><LF>OK<CR><LF>
Parameter description
<value>: integer; AT&D is equivalent to AT&D0.
z 0: The TA ignores the status of the DTR circuit.
z 1: enters the command mode while holding the current data conversation.
z 2 (default value): releases the data conversation and enters the command mode.
When DTR=OFF, automatic response is disabled.
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
AT&S[<value>]
Function Sets the status of the DSR line.
Response <CR><LF>OK<CR><LF>