AT Command Set

8.19 AT^SNFA Set or query microphone attenuation

Test command

Response

AT^SNFA=?

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

 

Parameter

Read command

AT^SNFA?

See read command

Response

TA returns the current attenuation value on the microphone path for the current audio device (selected by AT^SNFS, see section 8.25).

 

^SNFA: <atten> OK

 

<atten> integer type value

 

0 (0x0) – 65535 (0xFFFF)

 

attenuation = 20 log(<atten>/32767)

 

0

=> microphone is muted

 

32767 => no attenuation on the microphone path

 

values greater than 32767 are not used

 

 

Write command

TA controls the large-scale attenuation on the microphone path for the current

AT^SNFA=

audio device (selected by AT^SNFS, see 8.25) with the following restrictions:

<atten>

- it is not allowed for audio device 1

 

- as long as the microphone is muted, the write-command is temporarily disabled

 

- setting of value 0 is not allowed (use AT^SNFM=0 for this; see section 8.22).

 

- for values greater than 32767, 32767 will be used

 

Response

 

 

OK

 

 

If error is related to ME functionality

 

+CME ERROR: <err>

 

Parameter

 

 

See read command

 

 

Reference

Command does not require a PIN. The command is provided for compatibility with

 

M20 and is an alternative to AT^SNFI (see section 0, second parameter). Both

 

commands use the same audio parameter inCalibrate. To make the changes per-

 

sistent use AT^SNFW (see section 8.27).

 

 

 

Examples

^SYSSTART

 

 

at^snfa=?

 

 

^SNFA: (0-65535)

 

OK

 

 

at^snfa?

 

 

^SNFA: 32767

OK at^snfs=4

OK at^snfa=1

OK at^snfa? ^SNFA: 1

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Siemens MC35 manual Atsnfa Set or query microphone attenuation, Atsnfa=?, Atsnfa?, Snfa atten OK
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MC35 specifications

The Siemens MC35 is a compact and versatile modem designed primarily for mobile communication, data transmission, and machine-to-machine (M2M) applications. Launched in the early 2000s, it quickly became popular due to its blend of performance, reliability, and ease of integration, making it a solid choice for developers and businesses.

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To summarize, the Siemens MC35 stands out as a reliable modem with a rich feature set that includes GSM and GPRS support, SMS and voice capabilities, easy integration through various interface options, and energy-efficient operation. Its adaptability makes it a valuable tool for a wide array of communication and data transmission tasks, solidifying its place in the evolution of mobile communications technology.
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