Yealink SIP-T33P Administrator's Guide

Audio Features
176
Parameter
voice.tns.enable <y0000000000xx>.cfg
Description
It enables or disables the Noise Suppression feature.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
CP920
Web UI
Settings > Voice > Noise Proof > Noise Suppression
Background Noise Suppression (BNS)
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)
Automatic Gain Control (AGC) is applicable to the hands-free operation and is used to keep audio output at nearly
a constant level by adjusting the gain of signals in some circumstances. This increases the effective user-phone
radius and helps with the intelligibility of soft-talkers.
Voice Activity Detection (VAD)
VAD can avoid unnecessary coding or transmission of silence packets in VoIP applications, saving on computation
and network bandwidth.
Topic
VAD Configuration
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.
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 the phone detects a “silence” period; CNG is used to generate comfortable
noise when the 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.

Yealink SIP-T33P Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Wall mountable	Yes
Operating system installed	Linux
Lines quantity	4 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	4
Volume control	Buttons
Number of function keys	5
Display diagonal	2.4 \
Display resolution	320 x 240 pixels
Voice codecs	AGC, AJB, CNG, G.711a, G.711u, G.722, G.723.1, G.726, G.729, G.729A, PLC, VAD, iLBC
Security algorithms	AES, HTTPS
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet LAN interface type	Fast Ethernet
RJ-9 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Input frequency	50/60 Hz
AC adapter input voltage	100 - 240 V
Power consumption (typical)	3 W
Power consumption (Power over Ethernet (PoE))	5 W
Number of handles included	1 pc(s)
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %

Weight and Dimensions

Depth	186 mm
Width	212 mm
Height	146 mm