Administrator’s Guide for SIP-T4X IP Phones
200
Jitter buffer is a shared data area where voice packets can be collected, stored, and
sent to the voice processor in even intervals. Jitter is a term indicating variations in
packet arrival time, which can occur because of network congestion, timing drift or
route changes. The jitter buffer, located at the receiving end of the voice connection,
intentionally delays the arriving packets so that the end user experiences a clear
connection with very little sound distortion. IP phones support two types of jitter buffers:
static and dynamic. A static jitter buffer adds the fixed delay to voice packets. You can
configure the delay time for the static jitter buffer on IP phones. A dynamic jitter buffer is
capable of adapting the changes in the network's delay. The range of the delay time for
the dynamic jitter buffer added to packets can be also configured on IP phones.
Procedure
Jitter buffer can be configured using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Configure the mode of jitter
buffer and the delay time for
jitter buffer.
For more information, refer to
Jitter Buffer
on page
364
.
Local
Web User Interface
Configure the mode of jitter
buffer and the delay time for
jitter buffer.
Navigate to:
http://<phoneIPAddress>/servl
et?p=settings-voice&q=load
To configure Jitter Buffer via web user interface:
1.
Click on Settings->Voice.
2.
Mark the desired radio box in the Type field.
3.
Enter the minimum delay time for adaptive jitter buffer in the Min Delay field.
Valid values range from 0 to 300.
4.
Enter the maximum delay time for adaptive jitter buffer in the Max Delay field.
Valid values range from 0 to 300.
Summary of Contents for SIP-T4X
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