AT Command Manual for Sierra MC87XX Module

Voice Commands
Rev 2.9 Oct.08 89
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/MC8790V/MC8791V/MC8792Vonly)
6—AuxiliaryexternalPCM(128kHzclock)
• (MC8785V/MC8790V/MC8791V/MC8792V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.
Table 7-1: Default settings for each audio profile
Profile ID
Setting 0 1 2 3 4 5 6 7
Automatic Gain
Control (TX)
AT!AVTXAGC
Off On Off Off Off Off Off Off
Noise
Suppression (TX)
AT!AVNS
Off Off On On Off Off Off Off
AGC, AVC (RX)
AT!AVRXAGC
Off Off Off Off Off Off 0ff Off
Echo
Cancellation
AT!AVEC
Off Headset AEC Speaker
-
phone
Off Off Headset Headset
Sidetone gain
AT!AVCODECSTG
22 dB Affected
by AGC
Infinity Infinity Infinity Infinity n/a n/a
Codec TX gain
AT!AVCODECTXG
16 dB 16 dB 12 dB 12 dB 0 dB 0 dB n/a n/a
Code RX gain
AT!AVCODECRXG
6 dB 6 dB 12 dB 12 dB 0 dB 0 dB n/a n/a