At+Clvl - Quectel GSM Series Audio Design Manual

<gain-level> Range is 0 - 15

3.1.2.2. AT+CLVL

AT+CLVL is used to modify the analog gain of receiver. It can increase or reduce loudness of downlink
speech.
AT+CLVL
Test Command
AT+CLVL=?
Read Command
AT+CLVL?
Write Command
AT+CLVL=<level>
Reference
GSM 07.07
Parameter
<level> Integer type value (0-100) with manufacturer specific range (Smallest value represents
the lowest sound level)
Note
If the gain-level is too high, receiving distortion would happen.
GSM Module Audo Design Guide
Response
+CLVL: (list of supported <level>s)
OK
Response
+CLVL: <level>
OK
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
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