Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
311
Default
3600
Parameter
static.network.dns.last_cache_expired.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to use the DNS cache (even if the cache has expired) when the DNS
server fails to resolve the domain name.
Permitted
Values
0-Disabled
1-Enabled
Default
0
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
[2]
X is the record ID. X=1-12.
[3]
If you change this parameter, the phone will reboot to make the change take effect.
Logon Wizard
Logon wizard allows the phones to provide the logon wizard during the first startup. It works only if there is no
registered account on the IP phone.
It is not applicable to CP920 phones.
Topic
Logon Wizard Configuration
Logon Wizard Configuration
The following table lists the parameters you can use to configure the logon wizard.
Parameter
phone_setting.logon_wizard <y0000000000xx>.cfg
Description
It enables or disables the phone to provide the logon wizard after startup when there is no registered
account.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Supported
Devices
All phones except CP920
Web UI
Features > General Information > Logon Wizard
Parameter
hotdesking.startup_register_name_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to provide an input field of register name on the logon wizard after
startup when there is no registered account.
Note: It works only if “phone_setting.logon_wizard” is set to 1 (Enabled).
Permitted
Values
0-Disabled
1-Enabled
Default
0
Supported
Devices
All phones except CP920
Parameter
hotdesking.startup_username_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to provide an input field of user name on the logon wizard after star-

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