User`s manual

AT Command Reference Manual
7-28 1048
<spkr> Speaker Output Attentuation
Range: 0 to15 (speaker attenuation in 2 dB steps)
0 0 dB attenuation
.
5 10 dB attenuation (default)
.
15 30 dB attentuation
16 Speaker mute
<mic> Microphone Gain Parameter
Range: 0 to 3
0 0 dB gain
1 10 dB gain
2 15 dB gain (default)
3 20 dB gain
<mic> Except ACF/AFCL ACF/AFCL
0 0 dB 0 dB
1 6 dB gain (default) 10 dB gain
2 9.5 dB gain 15 dB gain (default)
3 12 dB gain 20 dB gain