Yealink SIP-T21 E2 Administrator's Guide

Configuring Audio Features
883
Procedure
CNG can be configured using the following methods.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure CNG.
Parameter:
voice.cng
Web User Interface
Configure CNG.
Navigate to:
http://<phoneIPAddress>/servlet?
p=settings-voice&q=load
Details of the Configuration Parameter:
Parameter
Permitted Values
Default
voice.cng
0 or 1
1
Description:
Enables or disables the 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.
2. Select the desired value from the pull-down list of CNG.

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English