At^snfm Mute Microphone; Audio Programming Model - Siemens TC37 Module At Command Reference

AT Command Set

6.22 AT^SNFM Mute microphone

Test command
AT^SNFM=?
Read command
AT^SNFM?
Write command
AT^SNFM=<mute>
Reference
Siemens

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
10uF
6,8R
6,8R
TC3X_ATC_01_V04.00
Response
^SNFM: (list of supported <mute> s) OK
Parameter
See write command
Response
^SNFM: <mute> OK
Parameter
See write command
Response
TA switches on/off the microphone
OK
Parameter
<mute> 0 Mute microphone
1 Microphone on
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.
2,65V
1k
1k
+0..42dB in
1k
6dB-steps
inBbcGain
1k
(0dB; -6db,
-12dB; -18dB)
outBbcGain
Figure 1: AT audio programming model
Page 164 of 204
inCalibrate
-¥...0dB
A
D
sideTone
D
+
A
outCalibrate[n]
speechcoder
speechdecoder
n = 0...4
AT parameters
29.05.2002