Yealink SIP-T57W Administrator's Guide

Phone Customization
201
Custom Wallpaper Picture Limit
Example: Setting a Custom Picture as Wallpaper
The following example shows the configuration for uploading custom picture named “wallpaper.jpg” and set it as
idle screen wallpaper. The custom picture is placed on the provisioning server “192.168.10.25”.
Example
wallpaper_upload.url = http://192.168.10.25/wallpaper.jpg
phone_setting.backgrounds = wallpaper.jpg
After provisioning, the phone idle screen wallpaper changes to custom picture “wallpaper.jpg”.
Transparency
The T57W/T54W/T48U/T48S/T48G phones display line keys and status bar transparently. If you use a custom pic-
ture with a color or complex background, it may affect the user’s experience. You can choose the appropriate trans-
parency for DSS key labels and status bar on the idle screen as required.
The following show line keys and status bar transparency set on T48S phones:
Topic
Transparency Configuration
Transparency Configuration
The following table lists the parameter you can use to adjust transparency.
Parameter
phone_setting.idle_dsskey_and_title.transparency <y0000000000xx>.cfg
Description
It configures the transparency of the DSS key labels and status bar on the idle screen for the IP phone.
Note: It is also applicable when the DSS key list is unfolded on the T57W/T48U/T48S/T48G phones.
Permitted
Values
0%, the DSS key labels and status bar are non-transparent.
20%, 40%, 60%, 80% or 100%
Default
100%
Supported
Devices
T57W, T54W, T48U, T48S, T48G
Web UI
Settings > Preference > Transparency
Phone UI
Menu > Basic > Display > Transparency

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