NEC UNIVERGE UM8000 User Manual page 207

Selecting a Phone System
The messaging system includes a comprehensive library of phone system settings that contain predefined parameters
for integrating the messaging system with your phone system.most phone systems commercially available. A "Default"
phone system setting is available, providing generic settings suitable for basic integration with almost any phone
system.
Use the following procedure to select a phone system when first configuring the messaging system.
To select your phone system
In the Navigation Pane, click System > Switch > Switch Information.
1.
For detailed field information, see the
Select a phone system from the Switch list.
2.
The phone system parameters appear in the Integration options field.
Specify the threshold value in the
3.
value.
The Positive Voice Detection (PVD) threshold is a trigger value for the software DSP detect function that
distinguishes the received audio as voice, tone, or line-noise. If there are more than two frequencies detected and
if the power levels goes above certain threshold PVD is reported.
For example, normal DTMF for in-band dialing has only two frequencies, as do most of normal call progress tones.
If there are 3 or more frequencies, the system checks if this is actually a human speaking. The PVD value
determines what amplitude and volume level of frequencies must be to be interpreted as speech rather than static
noise.
Click Save.
4.
Restart the messaging system.
5.
NOTE
T
HE NEW CONFIGURATION DOES NOT TAKE EFFECT UNTIL THE SYSTEM HAS BEEN RESTARTED
Related Topics
Configuring Integration Options
Configuring Identified Subscriber Messaging
Phone System Overview
Phone System Overview
Switch > Information
Positive voice detection (PVD) threshold
table.
field. The number is a floating point
.
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