Sierra Wireless MC8775 Reference Manual page 89

Table 7-1: Default settings for each audio profile
Setting
Automatic Gain
Control (TX)
AT!AVTXAGC
Noise
Suppression (TX)
AT!AVNS
AGC, AVC (RX)
AT!AVRXAGC
Echo
Cancellation
AT!AVEC
Sidetone gain
AT!AVCODECSTG
Codec TX gain
AT!AVCODECTXG
Code RX gain
AT!AVCODECRXG
Rev 2.9 Oct.08
The MC87xx modem supports six or eight audio profiles,
depending on the module type:
• 0—Handset
• 1—Headset
• 2—Car kit
• 3—Speaker phone
• 4—Auxiliary
• 5—TTY (TeleTYpe—a device that allows speech and
hearing‐impaired people to use a phone)
• (MC8785V / M C8790V / M C8791V / M C8792V only)
6—Auxiliary external PCM (128 kHz clock)
• (MC8785V / M C8790V / M C8791V / M C8792V only)
7—Primary external PCM (2 MHz clock)
AT commands that are used to change the audio configuration
have a profile parameter; any changes you make are applied to
the specified profile. The default audio configuration for each
profile is shown in Table 7‐1.
0 1 2
Off On Off
Off Off On
Off Off Off
Off Headset AEC
22 dB Affected Infinity
by AGC
16 dB 16 dB 12 dB
6 dB 6 dB 12 dB
Profile ID
3 4 5
Off Off Off
On Off Off
Off Off Off
Speaker Off Off
-
phone
Infinity Infinity Infinity
12 dB 0 dB 0 dB
12 dB 0 dB 0 dB
Voice Commands
6 7
Off Off
Off Off
0ff Off
Headset Headset
n/a n/a
n/a n/a
n/a n/a
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