> 18.5 | AT+CMUT Mute control

> 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(s)
> +CMUT: (list of supported<mute>s)
> OK

> Read Command AT+CMUT?
> Response(s)
> +CMUT: <mute>
> OK
> ERROR
> +CME ERROR: <err>

> Write Command AT+CMUT=<mute>
> Response(s)
> OK
> ERROR
> +CME ERROR: <err>

> Reference(s) |  | PIN |  | ASC0 | ASC1 | USB | MUX1 | MUX2 | MUX3 |  |  | Charge | Q | Last
> GSM 07.07 |  | - |  | + | + | + | + | + | + |  |  | - | + | -

> Parameter Description

> <mute>(num)

> 0(P)
> Mute off
> 1
> Mute on