Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Wallpaper
Wallpaper is a picture used as the background of the phone. The phone comes with a default picture. You can
change it to a built-in picture or custom wallpaper from personal pictures.
The wallpaper is only applicable to color screen phones and expansion module EXP50 (connected to the
T57W/T54W/T53W/T53 phones)/expansion module EXP43 (connected to the T48U/T46U/T43U phones).
Topics
Wallpaper Configuration
Wallpaper Customization
Adding a Wallpaper from a USB Flash Drive
Example: Setting a Custom Picture as Wallpaper
Wallpaper Configuration
You can change the wallpaper to any built-in picture or custom picture.
On T57W/T48U/T48S/T48G phones, you can also separately set the wallpaper when the DSS key list is unfolded,
avoiding the display of the line key labels to be blocked by the background picture.
The following show wallpaper set on T48S phones:
Note: On T54W/T46U/T46S/T46G/T29G phones, the line and soft key labels display over the wallpaper picture.
The following table lists the parameters you can use to change the wallpaper.
Parameter
phone_setting.backgrounds <y0000000000xx>.cfg
Description
It configures the wallpaper displayed on the phone idle screen.
Permitted
Values
T57W/T54W/T48U:
Default.jpg, 01.jpg, 02.jpg, 03.jpg, 04.jpg, 05.jpg or uploaded custom wallpaper name (for example,
wallpaper.jpg)
T46U:
Default.png, 01.png, 02.png, 03.png, 04.png, 05.png or uploaded custom wallpaper name (for
example, wallpaper.png)
Other Phones:
Default.jpg, 01.jpg, 02.jpg, 03.jpg, 04.jpg, 05.jpg, 06.jpg, 07.jpg, 08.jpg, 09.jpg or 10.jpg or uploaded
custom wallpaper name (for example, wallpaper.jpg)
Default
Default.jpg (Default.png for T46U)
Supported
Devices
All color screen phones
Web UI
T57W/T54W/T48U/T46U:

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