Yealink SIP-T38G Administrator's Guide

Administrator’s Guide for SIP-T3xG IP Phones
178
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 can also be used to 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 on
network bandwidth.
Procedure
VAD can be configured using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Configure the VAD feature.
For more information, refer to
Voice Activity Detection on
page 303.
Local
Web User Interface
Configure the VAD feature.
Navigate to:
http://<phoneIPAddress>/cgi-bi
n/cgiServer.exx?page=Phone-V
oice.htm
To configure VAD via web user interface:
1. Click on Phone->Voice.
2. Select the desired value from the pull-down list of VAD.
3. Click Confirm to accept the change.

Yealink SIP-T38G Specifications

General

Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Keypad number of keys	48
Touchscreen	-
Display resolution	480 x 272 pixels
Display number of colors	16.78 million colors
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Voice codecs	G.711, G.722, G.723.1, G.726
Bluetooth	No
Security algorithms	802.1x RADIUS, HTTPS, SSL/TLS
AC adapter input voltage	100 - 240 V
AC adapter output voltage	5 V
Power consumption (typical)	4.6 W
Operating relative humidity (H-H)	10 - 95 %
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Compliance industry standards	IEEE 802.3af
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	204 mm
Width	273 mm
Height	42 mm
Weight	1050 g