Sierra Wireless MC8775 Reference Manual page 97

Table 7-3: Voice command details (Continued)
!AVEC
=<profile>, <value>
!AVEC?<profile>
Supporting Mini Cards:
•
MC8775V
•
MC8785V
•
MC8790V
•
MC8791V
•
MC8792V
Rev 2.9 Oct.08
Command
Set / query the echo cancellation setting
This command sets the echo cancellation mode for the specified profile.
The echo canceller monitors the conversation and eliminates the echo
that may return to its point of origin (far end). Several settings are
available:
•
•
•
•
This setting is stored in non-volatile memory and persists across power
cycles.
Module-specific details:
•
•
Usage:
•
•
Parameters:
<profile> (audio profile number)
•
•
•
•
•
•
•
•
<value> (echo cancellation mode)
•
•
•
•
•
Description
Handset mode for mild echo with short delay
Headset mode for moderate echo with short delay
Car kit for loud echo with long delay
Speakerphone mode for loud echo with extreme acoustic distortion
MC8775V — The change to the audio system takes place immedi-
ately if the specified audio profile is active.
MC8785V / MC8790V / MC8791V / MC8792V — The change to the
audio system takes place the next time the sound device (re)starts.
AT!AVEC=<profile>, <value> sets the echo cancellation mode for
the specified <profile>
AT!AVEC?<profile> returns the echo cancellation mode (<value>)
for the specified <profile>
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)
0 = Echo cancellation off
1 = Handset echo cancellation mode (ESEC—Ear Seal Echo
Cancellation)
2 = Headset echo cancellation mode
3 = Car kit echo cancellation mode (AEC—Acoustic Echo Cancel-
lation)
4 = Echo cancellation speaker
Voice Commands
97