Yealink SIP-T57W Administrator's Guide

Configuration Parameters
533
Description
It configures how the phone behaves when pressing the OK key during the call.
Permitted
Values
0-Do not response
1-The phone sends a SIP INFO request that contains the event flashhook message body to the
remote party.
2-Enter the Status screen, you can check the firmware version, phone's IP address and so on for
troubleshooting.
3-Unhold the call
4-Enter the Menu screen, you are allowed to configure Call Forward, Call Waiting, Auto Answer, Key
As Send, Hotline, Auto Redial, DND, Intercom, Call Completion, History Setting, Paging List features.
Default
0
Supported
Devices
All phones except T57W, T48G, T46G, T42G, T41P and T29G
Unify Parameters
Parameter
unify.enable <y0000000000xx>.cfg
Description
It enables or disables the Unify features.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Supported
Devices
T57W, T54W, T53W, T53, T48U, T46U, T43U, T42U, T48S, T46S, T42S, T41S, T27G and CP920
Case Scen-
ario
Identify the Notify messages sent by the Unify server and synchronize the FWD / DND feature with
server.

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