Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Yealink phones support three NAT traversal techniques: manual NAT, STUN and ICE. If you enable manual NAT
and STUN, the phone will use the manually-configured external IP address for NAT traversal. The TURN protocol is
used as part of the ICE approach to NAT traversal.
The following table lists the parameters you can use to configure NAT traversal.
Parameter
account.X.nat.nat_traversal
[1]
<MAC>.cfg
Description
It enables or disables the NAT traversal for a specific account.
Note: If it is set to 1 (STUN), it works only if “static.sip.nat_stun.enable” is set to 1 (Enabled); if it is set
to 2 (Manual NAT), it works only if “static.network.static_nat.enable” is set to 1 (Enabled).
Permitted
Values
0-Disabled
1-STUN
2-Manual NAT
Default
0
Web UI
Account > Register > NAT
Phone UI
Color Screen Phones:
Menu > Advanced (default password: admin) > Accounts > Account X > NAT Status
Black-and-white Screen Phones:
Menu > Settings > Advanced Settings (default password: admin) > Accounts > AccountX > NAT Status
Note: Manual NAT cannot be configured via the phone user interface.
Parameter
static.network.static_nat.enable
[2]
<y0000000000xx>.cfg
Description
It enables or disables the manual NAT feature.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Network > NAT > Manual NAT > Active
Parameter
static.network.static_nat.addr <y0000000000xx>.cfg
Description
It configures the IP address to be advertised in SIP signaling.
It should match the external IP address used by the NAT device.
Note: It works only if “static.network.static_nat.enable” is set to 1 (Enabled).
Permitted
Values
IP Address
Default
Blank
Web UI
Network > NAT > Manual NAT > IP Address
Parameter
static.sip.nat_stun.enable <y0000000000xx>.cfg
Description
It enables or disables the STUN (Simple Traversal of UDP over NATs) feature.
Permitted
Values
0-Disabled
1-Enabled
Default
0

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