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HUAWEI MC509 CDMA LGA Module
AT Command Interface Specification
Serial Port Control Commands
Issue 01 (2011-08-26)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
53
5.2 &D–Command for Setting the MT Action in
Response to the DTR Signals
5.2.1 Syntax
Command
Possible Response(s)
&D[<value>]
<CR><LF>OK<CR><LF>
In case of an MT-related error:
<CR><LF>ERROR<CR><LF>
5.2.2 Interface Description
This command sets the MT action when data terminal ready (DTR) signals change
from ON to OFF.
5.2.3 Parameter Description
<value>:
0: The MT ignores the DTR status.
1: When DTR signals changes from ON to OFF, the MT switches to the command
mode and maintains the current conversation (reserved and not supported at
present).
2: When DTR signals changes from ON to OFF, the MT switches to the command
mode and interrupts the current data conversation (CSD, packet-switched (PS) data
service); when DTR=OFF, automatic answer is disabled (default value after startup).
In case of using the command without <value>, <value> is set to 0.
5.3 &S–Command for Setting the Changing Mode of
DSR Signals
5.3.1 Syntax
Command
Possible Response(s)
&S[<value>]
<CR><LF>OK<CR><LF>
In case of an MT-related error:
<CR><LF>ERROR<CR><LF>