Siemens Brodersen MC55 AT - Manual (Page 413)

MC55_ATC_V04.00 Page 413 of 475 3/17/06
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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 con-
trol the power supply of the MICP2 line (microphone input of the second analog audio interface).
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.
Syntax
Parameter Description
Microphone mute control parameter.
Evaluated only during voice calls and if
<MicVccCtl>
is omitted, e.g.
AT^SNFM
=1.
Command does not depend on audio mode.
0
Mutes the microphone.
1 (P) Activates the microphone.
Microphone supply voltage control parameter. Setting applies to microphone input 2 only.
CME error is given if
<MicSwitch>
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. Actual value is
determined by parameter data set of the selected audio mode.
Test Command
AT^SNFM=?
Response(s)
^SNFM:
(list of supported
<MicSwitch>
s) , (list of supported
<MicVccCtl>
s)
OK
Read Command
AT^SNFM?
Response(s)
^SNFM: <MicSwitch>
,
<MicVccState>
OK
Write Command
AT^SNFM=
[
<MicSwitch>
][,
<MicVccCtl>
]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last
SIEMENS ! % % % % % ! ! !
<MicSwitch>
(num)
<MicVccCtl>
(num)