Yealink SIP-T48G Administrator's Manual page 215

Procedure
CNG can be configured using the configuration files or locally.
Configuration File
Local
Details of the Configuration Parameter:
Parameter
voice.cng
Description:
Enables or disables CNG (Comfortable Noise Generation) feature on the IP phone.
0-Disabled
1-Enabled
Web User Interface:
Settings->Voice->Echo Cancellation->CNG
Phone User Interface:
None
To configure CNG via web user interface:
1. Click on Settings->Voice.
<y0000000000xx>.cfg
Web User Interface
Permitted Values
0 or 1
Configuring Audio Features
Configure CNG.
Parameter:
voice.cng
Configure CNG.
Navigate to:
http://<phoneIPAddress>/
servlet?p=settings-voice&
q=load
Default
1
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