Yealink T48G, Administrator'S Manual

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Audio Features
389
VAD Configuration
The following table lists the parameter you can use to configure VAD.
Parameter voice.vad <y0000000000xx>.cfg
Description It enables or disables the VAD (Voice Activity Detection) feature on the IP phone.
Permitted
Values
0-Disabled
1-Enabled
Default 0
Web UI
Settings->Voice->Echo Cancellation->VAD
Comfort Noise Generation (CNG)
Comfort Noise Generation (CNG) is used to generate background noise for voice communications during
periods of silence in a conversation.
Note
VAD is used to send CN packets when phone detect a “silence” period; CNG is used to generate comfortable
noise when 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 on the IP
phone.
Permitted
Values
0-Disabled
1-Enabled
Default 0
Web UI
Settings->Voice->Echo Cancellation->CNG
Jitter Buffer
Yealink 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.