Sierra Wireless MC8775 Reference Manual page 110

MC87xx Extended AT Command Reference
Table 7-3: Voice command details (Continued)
Command
!AVTXVOL
=<profile>, <value>
!AVTXVOL?
<profile>
Supporting Mini Cards:
•
MC8775V
•
MC8785V
•
MC8790V
•
MC8791V
•
MC8792V
Table 7-4: Tone settings for AT
<Value>
parameter
setting
0x00
0x01
0x02
0x03
0x04
110
Set the TX volume
This command sets / queries the TX volume gain for the specified audio
profile. The TX volume gain determines the gain, from -84 dB to +12 dB,
for the voice that is transmitted over the air. This gain is applied to the
PCM voice packets prior to feeding them into the vocoder, which
encodes the PCM packets into a more efficient format for over the air
transmission.
This setting is stored in non-volatile memory and persists across power
cycles. The change to the audio system takes effect when a phone call
is made or received.
Parameters:
<profile> (audio profile number)
•
0 = Handset
•
1 = Headset
•
2 = Car kit
•
3 = Speaker phone
•
4 = Auxiliary
•
5 = TTY
•
(MC8785V / MC8790V / MC8791V / MC8792V only)
6 = Auxiliary external PCM (128 kHz clock)
•
(MC8785V / MC8790V / MC8791V / MC8792V only)
7 = Primary external PCM (2 MHz clock)
<value> (TX volume gain)
•
Valid range: 0x0000 (mute) – 0xFFFF
•
Unity gain value is 0x4000
•
Calculate the gain in dB using the formula:
Gain = 20 log
Note: In the command, <value> is in hexadecimal format. In the
formula, convert <value> to decimal format.
!AVTONEPLAY
Tone
SND_0
SND_1
SND_2
SND_3
SND_4
Description
(<value> / 16384)
10
command
Description
DTMF for 0 key
DTMF for 1 key
DTMF for 2 key
DTMF for 3 key
DTMF for 4 key
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