Siemens AC75 18.9 AT^SNFA Set or query of microphone attenuation

AC75 AT Command Set

18.9 AT^SNFA s

AC75_ATC_V01.002 Page 464 of 569 10/30/06

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18.9 AT^SNFA Set or query of microphone attenuation

AT^SNFA specifies the large-scale attenuation on the microphone path of the audio device currently selected

with AT^SNFS. The write command is only available in audio modes 2 to 6.

Syntax

Parameter Description

Multiplication factor for input samples. Parameter <atten> is identical with <inCalibrate> of AT^SNFI.

Formula used to calculate microphone attenuation (negative gain):

Gain in dB = 20 * log(<atten>/32768)

0...32767(P)...65535

0 Microphone is muted.

Please note that AT^SNFA cannot be used to mute the microphone. Therefore,

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.

32767 No attenuation on the microphone path

Values greater than 32767 will be suppressed to 32767.

Notes

• This command is provided for compatibility with former products (e.g. M20) and is a subset of AT^SNFI. The

parameter <inCalibrate> of AT^SNFI is identical with <atten> of AT^SNFA.

• To make the changes persistent use AT^SNFW.

Test Command

AT^SNFA=?

Response(s)

^SNFA: (list of supported <atten>s)

Read Command

AT^SNFA?

Response(s)

^SNFA: <atten>

Write Command

AT^SNFA=<atten>

Response(s)

ERROR

CME ERROR: <err>

Reference(s) PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge 4Last

SIEMENS - + + + + + + - + -

<atten>(num)(^SNFW)