Yealink SIP-T57W Administrator's Guide

Advanced Features
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For T57W/T48U/T48S/T48G phones, the BLF/BLF List DSS key field displays a green icon for 1000ms
and then turns to white.
For other phones, the BLF/BLF list DSS key LED glows green for 1000ms and then goes out.
Note: It works only if “blf.enhanced.callout.enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
blf.enhanced.callout.callin.action <y0000000000xx>.cfg
Description
It configures the behavior when pressing the BLF/BLF list DSS key if the monitor is ringing and mon-
itored user is calling out.
Note: It works only if “blf.enhanced.callout.enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
blf.enhanced.callout.talking.action <y0000000000xx>.cfg
Description
It configures the behavior when pressing the BLF/BLF list DSS key if the monitor is talking and mon-
itored user is calling out.
Note: It works only if “blf.enhanced.callout.enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
blf.enhanced.callout.idle.action <y0000000000xx>.cfg
Description
It configures the behavior when pressing the BLF/BLF list DSS key if the monitor is idle and monitored
user is calling out.
Note: It works only if “blf.enhanced.callout.enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T19(P) E2 and CP920
BLF Key LED/Icon and Behavior for Talking State Configuration
The following table lists the parameters you can use to configure BLF key LED/icon and Behavior for talking state
(the monitored user is talking).
Parameter
blf.enhanced.talking.enable <y0000000000xx>.cfg
Description
It enables or disables the custom configuration when the monitored user is talking.
Permitted
Values
0-Disabled

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