Yealink T5 Series, Administrator'S Manual

Page: 296 / 472

Administrator’s Guide for SIP-T58V/T58A/T56A/CP960 IP Phones
290
Note
VAD is used to send CN packets when the phone detects a “silence” period; CNG is used to generate comfortable noise
when the phone receives CN packets from the other side.
Topic
CNG Configuration
CNG Configuration
The following table lists the parameter you can use to configure CNG.
Parameter voice.cng <y0000000000xx>.cfg
Description It enables or disables the CNG (Comfortable Noise Generation) feature.
Permitted Values
0 -Disabled
1 -Enabled
Default 0
Web UI Settings->Voice->Echo Cancellation->CNG
Jitter Buffer
Yealink 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 the 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 pack-
ets can be also configured on the phones.
Topic
Jitter Buffer Configuration
Jitter Buffer Configuration
You can configure the mode of jitter buffer and the delay time for jitter buffer in the wired network or wireless network.
The following table lists the parameters you can use to configure the jitter buffer.
Parameter voice.jib.adaptive <y0000000000xx>.cfg
Description It configures the type of jitter buffer in the wired network.
Permitted
Values
0 -Fixed
1 -Adaptive
Default 1
Web UI Settings->Voice->JITTER BUFFER->Type
Parameter voice.jib.min <y0000000000xx>.cfg
Description
It configures the minimum delay time (in milliseconds) of jitter buffer in the wired network.
Note : It works only if “voice.jib.adaptive” is set to 1 (Adaptive). The value of this parameter should be less
than “voice.jib.max” and “voice.jib.normal”.
Permitted
Values
Integer from 0 to 400