Siemens MC55 AT manual Atsnfa Set or query of microphone attenuation, Atsnfa=?, Atsnfa?

17.9AT^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

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

PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last

! % % % % % ! ! !

Parameter Description

<atten>(num)(^SNFW)

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.

MC55_ATC_V04.00	Page 409 of 475	3/17/06
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