MC52i AT Command Set

MC52i AT Command Set
17.12 AT^SNFM
17.12 AT^SNFM Set microphone audio path and power supply
The AT^SNFM read command returns the microphone mute and supply voltage status.
The AT^SNFM write command can be used to switch the microphone's audio path (muted / not muted) or to control
the power supply of the MICP2 line (microphone input of the second analog audio interface).
Please keep in mind that the MC52i Terminal has no programmable microphone power supply, therefore only
the mute switch applies.
The microphone can be muted or activated by changing in all audio modes (1 to 6), during a voice
call only. As an alternative, you can use the AT+CMUT command to mute the microphone.
Syntax
Test Command
AT^SNFM=?
Response(s)
^SNFM: (list of supported s) , (list of supported s)
OK
Read Command
AT^SNFM?
Response(s)
^SNFM: ,
OK
ERROR
+CME ERROR:
Write Command
AT^SNFM=[][, ]
Response(s)
OK
ERROR
+CME ERROR:
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
Parameter Description
(num)
Microphone mute control parameter.
Evaluated only during voice calls and if is omitted, e.g. AT^SNFM=1.
Command does not depend on audio mode.
0 Mutes the microphone.
1 (P) Activates the microphone.
(num)
Microphone supply voltage control parameter.
Parameter is not applicable to the MC52i Terminal. Setting applies to microphone input 2 only.
CME error is given if is not omitted. Enter for example AT^SNFM=,1 or AT^SNFM=,2.
0 Supply voltage is always switched off.
1 Supply voltage is always switched on.
2 (P) Supply voltage state during voice calls is controlled by the ME. The actual
value is determined by the parameter data set of the selected audio mode.
MC52i_ATC_V01.201 Page 485 of 551 4/16/10
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