Specifications

Chapter 17 – Audio Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 219
17.12 AT^SNFM Set Microphone Audio Path
Description: The read command returns the microphone mute and supply voltage status.
The write command can be used to switch the microphone’s audio path (muted/ not
muted) .
The microphone can be muted or activated by changing <MicSwitch> in all audio modes
(1 to 6) and during a voice call only. As an alternative, you can use the AT+CMUT
command to mute the microphone.
Test Command Syntax: AT^SNFM=?
Response: ^SNFM: (list of supported <MicSwitch>s)
OK
Read Command Syntax: AT^SNFM?
Response: ^SNFM: <MicSwitch>
OK
Write Command Syntax: AT^SNFM=[<MicSwitch>]
Response: OK
Parameter Description:
<MicSwitch>
Microphone mute control parameter.
Evaluated during voice calls and if <MicVccCtl> is omitted only (e.g., AT^SNFM=1).
Command does not depend on audio mode.
0 Mutes the microphone.
1 Activates the microphone. Default.