iTegno 39XX GPRS Modem
AT Commands Guide
02000C17
•
v1.5
Confidential
All specifications are correct at the time of release. iWOW Connections owns the proprietary rights to the information contained herein this
document. It may not be edited, copied or circulated without prior written agreement by iWOW Connections Pte Ltd. © 2011, 2012 iWOW
Connections Pte Ltd
99
OK
AT$VECHO=5,4095
OK
AT$VECHO=0,1
Note: Echo Cancellation is enabled
automatically when a call is
connected (default)
OK
AT$VECHO=0,0
Note: Echo Cancellation has to be
enabled manually when a call is
connected
OK
AT$VECHO
Note: Enable Echo Cancellation
OK
Defined Values
<parameter>
Each parameter number is representing a field as shown below:
0
=
Enables Echo Cancellation
1
=
Echo Cancellation
2
=
Continuous Filtering
3
=
Granularity of the smoothed attenuation
4
=
Smoothing coefficient
5
=
Level of max echo Cancellation
6
=
Voice Activity Detector (VAD) factor
7
=
Voice Activity Detector (VAD) absolute offset
8
=
NA
9
=
NA
10
=
Echo Cancellation Visibility
11
=
Noise Suppression
12
=
Level of noise suppression
<value>
<0>
0
=
Manually enable Echo Cancellation when call is connected
1
=
Automatically enable Echo Cancellation when call is connected (default)
<1 >
Enable/Disable Echo Cancellation function
0
=
Disable Echo cancellation
2
=
Enable Echo cancellation (default)