Yealink SIP-T57W Administrator's Guide

Audio Features
174
Acoustic Echo Cancellation (AEC)
Noise Suppression
Background Noise Suppression (BNS)
Automatic Gain Control (AGC)
Voice Activity Detection (VAD)
Comfort Noise Generation (CNG)
Jitter Buffer
Smart Noise Block
Acoustic Shield
Smart Noise Filtering
Acoustic Echo Cancellation (AEC)
Yealink phones employ advanced AEC for hands-free operation. You can configure the AEC feature to remove the
echo of the local loudspeaker from the local microphone without removing the near-end speech.
AEC is not normally required for calls via the handset. In some cases, where echo is experienced by the remote
party, AEC may be used to reduce/avoid echo when you use the handset.
Note: Utilizing acoustic echo cancellation will introduce a small increase of delay into an audio path which might cause a
lower voice quality.
Topic
AEC Configuration
AEC Configuration
The following table lists the parameter you can use to configure AEC.
Parameter
voice.echo_cancellation <y0000000000xx>.cfg
Description
It enables or disables the AEC (Acoustic Echo Canceller) feature.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Web UI
Settings > Voice > Echo Cancellation > ECHO
Noise Suppression
The impact noise in the room is picked-up, including paper rustling, coffee mugs, coughing, typing, and silverware
striking plates. These noises, when transmitted to remote participants, can be very distracting.
You can enable the Noise Suppression feature to suppress these noises.
It is only applicable to CP920 phones.
Topic
Noise Suppression Configuration
Noise Suppression Configuration
The following table lists the parameter you can use to configure noise suppression.
Parameter
voice.tns.enable <y0000000000xx>.cfg
Description
It enables or disables the Noise Suppression feature.
Permitted
Values
0-Disabled
1-Enabled

Yealink SIP-T57W Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Ethernet LAN	Yes
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Security algorithms	AES, HTTPS, MD5, SRTP
Networking standards	IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP/TFTP/HTTP/HTTPS
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
AC adapter input voltage	100 - 240 V
AC adapter output current	2 A
AC adapter output voltage	5 V
Volume control	Buttons
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	7 \
Display resolution	800 x 480 pixels
Front camera	No
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Voice codecs	G.722, G.723.1, G.726, G.729A, G.729B, iLBC

Weight and Dimensions

Depth	220 mm
Width	259.4 mm
Height	211 mm