Yealink SIP-T31G Administrator's Guide

Administrator’s Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
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Wallpaper Customization
You can configure a custom picture, such as company logo, and then upload the custom picture to the IP phone that
users can choose from when changing the wallpaper for the phone idle screen, expansion module or Dsskey
screen.
Topics
Custom Wallpaper Picture Limit
Custom Wallpaper Configuration
Deleting a Custom Picture
Custom Wallpaper Picture Limit
Either the smaller or the larger picture will be scaled proportionally to fit the screen. The wallpaper picture format
must meet the following:
Phone Model Format Resolution Single File Size Note
EXP50/EXP43
*.jpg/*.png/*.bmp/*.jpeg
<=4.2 mega-
pixels
<=5MB
2MB of space should
be reserved for the
phone
T57W/T54W/T48U/T48S/T48G <=2.0 mega-
pixels
<=5MB
T46U/T46S/T46G/T33P/
T33G/T29G
<=1.8 mega-
pixels
<=5MB
Custom Wallpaper Configuration
The following table lists the parameter you can use to upload a custom picture.
Parameter
wallpaper_upload.url <y0000000000xx>.cfg
Description
It configures the access URL of the custom wallpaper picture.
Permitted
Values
URL within 511 characters
Default
Blank
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T33P, T33G, T29G
Web UI
T57W/T54W/T53W/T53/T48U/T46U/T43U:
Settings > Preference > Upload Wallpaper > Custom Wallpaper > Upload Wallpaper
Other Phones:
Settings > Preference > Upload Wallpaper
Deleting a Custom Picture
You can delete the uploaded custom pictures for a specific IP phone via the web user interface at the path: Settings
> Preference > Wallpaper (Settings > Preference > Wallpaper > Upload Wallpaper > Custom Wallpaper), select
the desired custom picture and click Del (Delete). You can also delete the custom pictures via the phone user inter-
face at the path: Menu > Basic > Display > Wallpaper. You can only delete the custom pictures.
Adding a Wallpaper from a USB Flash Drive
The T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G IP phone enables you to add wallpaper from a USB
flash drive on their phones. You can navigate to Menu > USB > Browse Photo, preview pictures, and then set the

Yealink SIP-T31G Specifications

General

Mounting kit	Yes
Number of handles included	1 pc(s)
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Voice codecs	G.722, G.729, AGC, G.729A, AJB, PLC, G.711Mu, VAD, G.711a, G.723.1, G.726, iLBC, CNG, OPUS
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	3 W
Lines quantity	2 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	2
Sustainability certificates	RoHS, REACH
Networking standards	IEEE 802.3af, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1x
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	189 mm
Width	188 mm
Height	162 mm
Package depth	210 mm
Package width	213 mm
Package height	103 mm