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HUAWEI MG323 GSM M2M Module
AT Command Interface Specification Commands for Audio Control
Issue 02 (2010-11-23)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
198
Parameter description
<level>: integer; indicates the microphone gain level; value range: –12 to +13;
Default value: 0.
z
–12: minimum gain
z
12: maximum gain
z
13: microphone muted
15.2.2 Querying the Current Microphone Gain Level
Read
command
AT+CMIC?
Function
Queries the current microphone gain level
Response
z
In case of successful execution:
<CR><LF>+CMIC: <level><CR><LF>
<CR><LF>OK<CR><LF>
z
In case of an error: <CR><LF>ERROR<CR><LF>
15.2.3 Setting the Microphone Gain Level
Write
command
AT+CMIC=<level>
Function
Sets the microphone gain level
Response
z
In case of successful execution: <CR><LF>OK<CR><LF>
z
In case of an error: <CR><LF>ERROR<CR><LF>
z
In case of an error related to the MT: <CR><LF> +CME ERROR:
<err><CR><LF>
Note:
This command applies to both audio channels, but it can be executed only before a voice call
is initiated.
15.3 AT^ECHO - Command for Suppressing the Echo
The AT^ECHO command suppresses the echo.