Jitter Buffer - Yealink SIP-T2 Series Administrator's Manual

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860 IP Phones
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3.

Jitter Buffer

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: fixed and adaptive. A fixed jitter buffer adds the fixed delay to
voice packets. You can configure the delay time for the static jitter buffer on IP phones. An
adaptive 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 following methods.
Central
Provisioning
(Configuration File)
Web User Interface
870
<y0000000000xx>.cf
g
Configure the mode of jitter buffer and
the delay time for jitter buffer in the wired
network.
Parameters:
voice.jib.adaptive
voice.jib.min
voice.jib.max
voice.jib.normal
Configure the mode of jitter buffer and
the delay time for jitter buffer in the
wireless network.
Parameters:
voice.jib.wifi.adaptive
voice.iib.wifi.min
voice.jib.wifi.max
voice..jib.wifi.normal
Configure the mode of jitter buffer and
the delay time for jitter buffer in the wired
network.
Navigate to:
http://<phoneIPAddress>/servlet?p=setti
ngs-voice&q=load