Siemens MC55 - page 409

MC55 AT Command Set

16.12 AT^SNFM s

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MC55_ATC_V01.05 Page 409 of 469 2/10/04

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Parameter Description

Microphone mute control parameter.

Evaluated during voice calls and if <MicVccCtl> is omitted only, e.g. AT^SNFM=1.

Command does not depend on audio mode.

0 Mutes the microphone.

1(P) Activates the microphone.

Microphone supply voltage control parameter.

Setting applies to microphone input 2 only.

CME error is given if <MicSwitch> is not omitted. Enter for example AT^SNFM=,1 or AT^SNFM=,2.

0 Supply voltage is always switched off.

1 Supply voltage is always switched on.

2(P) Supply voltage state during voice calls is controlled by the ME. Actual value is

determined by parameter data set of the selected audio mode.

Microphone supply voltage control status.

0 Supply voltage was set to a constant value.

2 Supply voltage state is controlled by the ME and depends on parameter data

set of the selected audio mode.

Notes

• The programmable power supply of the MICP2 line gives you greater flexibil ity in connecting audio accesso-

ries or using MICP2 for a variety of functions other than audio. A detailed description of the extended usage

of MICP2 can be found in [7].

• The microphone can be muted or activated in all audio modes (1 to 6) and during a voice call only. See

AT^SNFS for more details on the various audio modes. As alternative, you can use the AT+CMUT command

to mute the microphone.

• During an active call, users should be aware that when they switch bac k and forth between different audio

modes (for example handsfree on/off) the value of <MicSwitch> does not change, i.e. the microphone mode

is retained until explicitly changed.

<MicSwitch>(num)

<MicVccCtl>(num)

<MicVccState>(num)