Yealink SIP-T57W Administrator's Guide

Security Features
108
l DHE-RSA-AES256-SHA
l DHE-DSS-AES256-SHA
l AES256-SHA
l EDH-RSA-DES-CBC3-SHA
l EDH-DSS-DES-CBC3-SHA
l DES-CBC3-SHA
l DES-CBC3-MD5
l DHE-RSA-AES128-SHA
l DHE-DSS-AES128-SHA
l AES128-SHA
l RC2-CBC-MD5
l IDEA-CBC-SHA
l DHE-DSS-RC4-SHA
l RC4-SHA
l RC4-MD5
l RC4-64-MD5
l EXP1024-DHE-DSS-DES-CBC-SHA
l EXP1024-DES-CBC-SHA
l EDH-RSA-DES-CBC-SHA
l EDH-DSS-DES-CBC-SHA
l DES-CBC-SHA
l DES-CBC-MD5
l EXP1024-DHE-DSS-RC4-SHA
l EXP1024-RC4-SHA
l EXP1024-RC4-MD5
l EXP-EDH-RSA-DES-CBC-SHA
l EXP-EDH-DSS-DES-CBC-SHA
l EXP-DES-CBC-SHA
l EXP-RC2-CBC-MD5
l EXP-RC4-MD5
l ECDHE
Supported Trusted and Server Certificates
The IP phone can serve as a TLS client or a TLS server. In the TLS feature, we use the terms trusted and server cer-
tificate. These are also known as CA and device certificates.
The TLS requires the following security certificates to perform the TLS handshake:
l
Trusted Certificate: When the IP phone requests a TLS connection with a server, the phone should verify the
certificate sent by the server to decide whether it is trusted based on the trusted certificates list. You can upload
10 custom certificates at most. The format of the trusted certificate files must be *.pem, *.cer, *.crt and *.der and
the maximum file size is 5MB.
l
Server Certificate: When clients request a TLS connection with the IP phone, the phone sends the server cer-
tificate to the clients for authentication. The IP phone has two types of built-in server certificates: a unique server
certificate and a generic server certificate. You can only upload one server certificate to the IP phone. The old
server certificate will be overridden by the new one. The format of the server certificate files must be *.pem and
*.cer and the maximum file size is 5MB.
A unique server certificate: It is unique to an IP phone (based on the MAC address) and issued by the Yealink
Certificate Authority (CA).
A generic server certificate: It is issued by the Yealink Certificate Authority (CA). Only if no unique certificate
exists, the phone may send a generic certificate for authentication.

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