Specifications

Chapter 16 – Audio Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 261
16.4 AT+CLVL Loudspeaker Volume Level
Syntax: Test Command: AT+CLVL=?
Response: +CLVL: (list of supported<level>s)
OK
Read Command: AT+CLVL?
Response: +CLVL: <level>
OK
ERROR
+CME ERROR: <err>
Write Command: AT+CLVL=<level>
Response: OK
ERROR
+CME ERROR: <err>
Parameter:
<level> Loudspeaker Volume Level
0...4 Default = 4
Notes:
• The write command can only be used in audio mode 2 - 6.
• The values of the volume steps are specified with the parameters <outCalibrate>[0],...<outCalibrate>[4] of the
AT^SNFO command.
• As an alternative to AT+CLVL, you can use AT^SNFO and AT^SNFV. The parameter <level> is identical with
<outStep> used by both commands.
• Any change to <level> (or <outStep>) takes effect in audio modes 2 to 6. That is, when you change <level> (or
<outStep>) and then select another mode with AT^SNFS, the same step will be applied.
The only exception is audio mode 1 which is fixed to <level>=4 (or accordingly <outStep>=4).
• <level> (or <outStep>) is stored non-volatile when the ME is powered down with AT^SMSO or reset with
AT+CFUN=1,1.
• This command is not PIN protected.
• This command is supported in airplane mode.
16.5 AT+CMUT Mute Control
Description: The AT+CMUT command mutes the microphone input. The command can be used in all audio
modes (1 to 6) and during a voice call only. See AT^SNFS for more details on the various audio
modes. As alternative, you can use the AT^SNFM command.
During an active call, users should be aware that when they switch back and forth between
different audio modes (for example handsfree on/off) the value of <mute> does not change; i.e.,
the microphone mode is retained until explicitly changed.
Syntax: Test Command: AT+CMUT=?
Response: +CMUT: (list of supported<mute>s)
OK
Read Command: AT+CMUT?
Response: +CMUT: <mute>
OK
ERROR
+CME ERROR: <err>
Write Command: AT+CMUT=<mute>
Response: OK
ERROR
+CME ERROR: <err>
Parameter:
<mute>
0 Mute off. Default. This is a powerup default which is not stored at power down.
1 Mute on
Notes:
• This command is not PIN protected.
• This command is supported in airplane mode.