Yealink SIP-T57W Administrator's Guide

Phone Provisioning
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Note: If the phone performs auto provisioning when receiving a SIP NOTIFY message which contains
the header “Event: check-sync”, the phone will display the prompt message no matter whether the con-
figuration is updated.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
static.auto_provision.connect.keep_alive <y0000000000xx>.cfg
Description
It enables or disables the long connection for downloading files via auto provisioning.
Permitted
Values
0-Disabled, the phone uses the short connection for downloading files via auto provisioning
1-Enabled
Default
0
Parameter
static.auto_provision.authentication.expired_time <y0000000000xx>.cfg
Description
It configures the timeout (in seconds) after which the authentication pop-up box for auto provisioning
disappears.
Permitted
Values
0-The authentication pop-up box does not disappear from the phone screen automatically.
Integer from 10 to 86400 -The authentication pop-up box automatically disappears from the phone
screen after the designated time.
Default
7200
Parameter
static.auto_provision.dns_resolv_nosys <y0000000000xx>.cfg
Description
It enables or disables the phone to resolve the access URL of the provisioning server using download
libraries mechanism.
Permitted
Values
0-Disabled, the phone resolves the access URL of the provisioning server using the system mech-
anism.
1-Enabled
Default
1
Supported
Devices
T42G, T41P, CP920
Parameter
static.auto_provision.dns_resolv_nretry <y0000000000xx>.cfg
Description
It configures the retry times when the phone fails to resolve the access URL of the provisioning server.
Note: For each different DNS server, it works only if “static.auto_provision.dns_resolv_nosys" is set to
1 (Enabled).
Permitted
Values
Integer from 1 to 10
Default
2
Parameter
static.auto_provision.dns_resolv_timeout <y0000000000xx>.cfg
Description
It configures the timeout (in seconds) for the phone to retry to resolve the access URL of the pro-
visioning server.
Note: For each different DNS server, it works only if “static.auto_provision.dns_resolv_nosys" is set to
1 (Enabled).
Permitted
Values
Integer from 1 to 60
Default
5

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