Installation guide

Adjusting IP call quality parameters 6-39
Chapter 6: IP Telephony Configuration
Wave Global Administrator Guide
Adjusting IP call quality parameters
Caution: These parameters only apply to the IP telephony resources on the Wave
system and do not affect the performance of the IP phones. These are expert settings
that should not be modified unless you are instructed to do so by your Vertical
Technical Support representative.
Most of the IP call quality parameters can be found in the System Parameters folder of the IP
Telephony applet. If you are not familiar with IP telephony, you should contact your Wave
product support vendor for information about adjusting these settings. If you want to return to
the system defaults, click Restore Defaults in any of the System Parameters screens.
You can adjust the following IP call quality parameters:
• Jitter buffer. See page 6-39.
• Echo cancellation. See page 6-41.
• Comfort noise. See page 6-43.
• Gain. See page 6-44.
• DTMF transport settings. See page 6-46.
• Quality Of Service (QoS) settings. See page 6-47.
Jitter buffer
Caution: This is an expert setting that should not be modified unless you are instructed
to do so by your Vertical Technical Support representative.
Voice packets can experience a high level of network delay, especially if the lines are congested.
The jitter buffer temporarily holds incoming packets in order to assemble them in the correct
order and recreate a high-quality voice signal.
To adjust the jitter buffer
1 If necessary, click the Administration tab of the Management Console.
2 Click the IP Telephony icon, located in the PBX Administration section.
Click
Release 2.0
September 2010