Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
556
Verifying the firmware version
Press the OK/√key or select Menu > Status when the phone is idle to check the firmware version. For example
28.82.0.20.
Item Description
1 28
Firmware ID.
The firmware ID for each IP phone model is:
l 97: T57W
l 96: T54W
l 95: T53W/T53
l 108: T48U/T46U/T43U
l 116: T42U
l 35: T48G
l 28: T46G
l 66: T48S/T46S/T42S/T41S
l 29: T42G
l 36: T41P
l 54: T40P
l 76: T40G
l 46: T29G
l 69: T27G
l 44: T23P/G
l 52: T21(P) E2
l 53: T19(P) E2
l 78: CP920
2 82
Major version.
Note: The larger it is, the newer the major version is.
3 0 A fixed number.
4 20
Minor version.
Note: With the same major version, the larger it is, the newer the minor version is.
The IP phone does not update the configurations
Do one of the following:
l Ensure that the configuration is set correctly.
l Reboot the phone. Some configurations require a reboot to take effect.

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