Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 560)

Audio Commands
Microphone Mute Control +CMUT
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WM_DEV_OAT_UGD_049 - 001 VOLUME 4 August 23, 2007
21.3 Microphone Mute Control +CMUT
Test and read command
Action command
21.3.1 Description
This command is used to mute the microphone input on the product (for the active
microphone set with the +SPEAKER command). The action command is only allowed
during a call.
21.3.2 Syntax
Action command
AT+CMUT=<mode>
OK
Read command
AT+CMUT?
+CMUT: <mode>
OK
Test command
AT+CMUT=?
+CMUT: (list of supported <mode>s)
OK
21.3.3 Parameters and Defined Values
<mode>:
microphone mute mode
0 microphone mute off (default value)
1 microphone mute on
21.3.4 Parameter Storage
None.