Yealink T29G Administrator's Guide

Configuring Audio Features
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Background noise suppression (BNS) is designed primarily for hands-free operation and
reduces background noise to enhance communication in noisy environments.
Automatic Gain Control (AGC) is applicable to hands-free operation and is used to
keep audio output at nearly a constant level by adjusting the gain of signals in certain
circumstances. This increases the effective user-phone radius and helps with the
intelligibility of talkers.
Voice Activity Detection (VAD) is used in speech processing to detect the presence or
absence of human speech. When detecting period of “silence”, VAD replaces that
silence efficiently with special packets that indicate silence is occurring. It can facilitate
speech processing, and deactivate some processes during non-speech section of an
audio session. VAD can avoid unnecessary coding or transmission of silence packets in
VoIP applications, saving on computation and network bandwidth.
Procedure
VAD can be configured using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Configure VAD.
Parameter:
voice.vad
Local
Web User Interface
Configure VAD.
Navigate to:
http://<phoneIPAddress>/
servlet?p=settings-voice&
q=load
Details of the Configuration Parameter:
Parameter
Permitted Values
Default
voice.vad
0 or 1
0
Description:
Enables or disables VAD (Voice Activity Detection) feature on the IP phone.

Yealink T29G Specifications

General

VoIP Protocols	SIP
PoE Support	Yes (IEEE 802.3af)
Headset Port	RJ9
Bluetooth	No
Weight	1.04 kg
Display	4.3" color display with backlight, 480 x 272 pixels
Line Keys	10 line keys
Ethernet Ports	2 x 10/100/1000 Mbps
Audio Codecs	G.722, G.711, G.729, G.726, iLBC
USB Port	1 x USB 2.0
Expansion Module Support	Yes, supports up to 6 EXP20 expansion modules
EHS	Yes
Supported Protocols	SIP
Operating Temperature	-10~50°C
Humidity	10% to 95% (non-condensing)