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17.9
AT^SNFA Set or query of microphone attenuation
specifies the large-scale attenuation on the microphone path of the audio device currently selected
AT^SNFA
with AT^SNFS. The write command is only available in audio modes 2 to 6.
Syntax
Test Command
AT^SNFA=?
Response(s)
^SNFA: (list of supported <atten>s)
OK
Read Command
AT^SNFA?
Response(s)
^SNFA:
<atten>
OK
Write Command
AT^SNFA=<atten>
Response(s)
OK
ERROR
CME ERROR: <err>
Reference(s)
SIEMENS
Parameter Description
(num)(^SNFW)
<atten>
Multiplication factor for input samples. Parameter
Formula used to calculate microphone attenuation (negative gain):
Gain in dB = 20 * log(<atten>/32768)
(P)
0...32767
...65535
0
32767
Notes
•
This command is provided for compatibility with former products (e.g. M20) and is a subset of AT^SNFI. The
parameter
<inCalibrate>
•
To make the changes persistent use AT^SNFW.
MC55_ATC_V04.00
Confidential / Released
PIN
!
<atten>
Microphone is muted.
Please note that
AT^SNFA
any attempt to enter 0 will be rejected with error response. Value 0 is returned
only by the read command AT^SNFA? after the microphone was muted with
AT^SNFM=0 during an active call.
No attenuation on the microphone path
Values greater than 32767 will be suppressed to 32767.
of
is identical with
AT^SNFI
Page 409 of 475
ASC0 ASC1
MUX1
MUX2
%
%
%
%
is identical with
<inCalibrate>
cannot be used to mute the microphone. Therefore,
of AT^SNFA.
<atten>
MUX3 Charge
Last
%
!
!
!
of AT^SNFI.
3/17/06
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