Net-2000™ Voice Codec Unit
User’s Manual
Page 19
Section 3 – Net-2000™ VCU Control
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Reset to Defaults Button
A Reset to defaults button is provided to set the I/O and vocoder conditions to the factory default
state. Selecting this reset buttons set the Vocoder Setting Page to the settings that a set on start-up.
The
Default vocoder values are as follows:
Home Page Defaults
Item
Value
Voice Source
Handset
Vocoder Mode
AMBE+
Voice Rate
4000 bps
Target IP
127.0.0.1
FEC
0 bps
CNI
Off
VAD
Off
Echo
Off
Data Source
Loop-Back
Table 7 Default Values
NOTE:
At power-up the VCU automatically starts up with the default settings. You do not
need to use the web interface unless you want to change these settings.
Vocoder Mode Configuration
Figure 13 Vocoder Options
To fine tune the capability of any of the three vocoder modes the NET-2000™ VCU provides VAD,
CNI and Echo cancellation options. To select any of these extended features use the home page
navigation menu to go to the Vocoder Page and click on the desired vocoder option.
Voice Activation Detection (VAD)
The Voice Activation Detection (VAD) algorithm along with the Comfort Noise Insertion (CNI) feature
of the NET-2000™ VCU is a useful function for systems trying to save in system bandwidth or to
reduce transmit power during times of conversational silence.