Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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DHCP IPv6 Client > Static DNS(Enabled) > Pri.DNS
Parameter
static.network.wifi.ipv6_secondary_dns
[1]
<y0000000000xx>.cfg
Description
It configures the secondary IPv6 DNS server for the wireless network.
Note: It works only if “static.network.wifi.ip_address_mode" is set to 1 (IPv6) or 2 (IPv4 & IPv6). In
DHCP environment, you also need to make sure “static.network.wifi.ipv6_static_dns_enable" is set to
1 (On).
Permitted
Values
IPv6 Address
Default
Blank
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T46U, T46S, T43U, T42U, T42S, T41S, T27G, CP920
Web UI
T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U:
Network > Wi-Fi > IPv6 Config > Static IPv6 DNS > Secondary DNS
Other Phones:
Network > Wi-Fi > IPv6 Config > Static IP Address > Secondary DNS
Phone UI
Color Screen Phones:
Menu > Advanced (default password: admin) > Network > Wi-Fi Port > IPv6 > Static IP > Sec.DNS
In DHCP environment:
Menu > Advanced (default password: admin) > Network > Wi-Fi Port > IPv6 > DHCP > Static DNS
(Enabled) > Sec.DNS
Black-and-white Screen Phones:
Menu > Settings > Advanced Settings (default password: admin) > Network > Wi-Fi Port > IPv6 >
Static IPv6 Client > Sec.DNS
In DHCP environment:
Menu > Settings > Advanced Settings (default password: admin) > Network > Wi-Fi Port > IPv6 >
DHCP IPv6 Client > Static DNS(Enabled) > Sec.DNS
Parameter
static.network.wifi.ipv6_icmp_v6.enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the phone to obtain IPv6 wireless network settings via SLAAC (Stateless
Address Autoconfiguration).
Note: It works only if “static.network.wifi.ipv6_internet_port.type” is set to 0 (DHCP).
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T46U, T46S, T43U, T42U
Web UI
Network > Advanced > Wi-Fi ICMPv6 Status > Active
[1]
If you change this parameter, the phone will reboot to make the change take effect.
Real-Time Transport Protocol (RTP) Ports
Since the phone supports conferencing and multiple RTP streams, it can use several ports concurrently. You can
specify the phone’s RTP port range.

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