Specifications

AT Command Set
TC3X_ATC_01_V04.00 Page 164 of 204 29.05.2002
6.22 AT^SNFM Mute microphone
Test command
AT^SNFM=?
Response
^SNFM: (list of supported <mute>s) OK
Parameter
See write command
Read command
AT^SNFM?
Response
^SNFM: <mute> OK
Parameter
See write command
Write command
AT^SNFM=<mute>
Response
TA switches on/off the microphone
OK
Parameter
<mute> 0 Mute microphone
1 Microphone on
Reference
Siemens
Note
This command can be used in all audio modes (1 to 6) and during a
voice call only.
Users should be aware that when they switch back and forth between
different audio modes the value of <mute> does not change. This means
that the status of mute operaton is retained until explicitly changed.
As alternative, you can use the AT+CMUT command described in
Chapter 4.23.
6.23 Audio programming model
The following figure illustrates how to adjust the signal path with the AT command parameters
described in the Chapters 6.20 to 6.28
A
D
A
D
-
¥
...0dB
speechcoder
(0dB; -6db,
-12dB; -18dB)
+0..42dB in
6dB-ste
p
s
1k
1k
1k
1k
2,65V
10uF
6,8R
6,8R
+
sideTone
A
T parameters
outCalibrate[n]
n = 0...4
inCalibrate
inBbcGain
outBbcGain
speechdecoder
Figure 1: AT audio programming model