Yealink SIP-T4X Administrator's Manual page 55

To configure contrast via phone user interface (only applicable to EXP40 connected to
SIP-T48G/T46G IP phones):
1. Press Menu-> Basic->Display->Contrast.
2. Press or , or the Switch soft key to increase or decrease the intensity of
contrast.
The default contrast level is 6.
3. Press the Save soft key to accept the change.
Wallpaper is an image used as the background of the phone idle screen. Users can
select an image from IP phone's built-in background or customize wallpaper from
personal pictures. To set the custom wallpaper as the phone background, you need to
upload the custom wallpaper to the IP phone in advance. The wallpaper is not
applicable to SIP-T42G and SIP-T41P IP phones.
The wallpaper image format must meet the following:
Phone Model
SIP-T46G .jpg/.png/.bmp
SIP-T48G .jpg/.png/.bmp
Procedure
Wallpaper can be configured using the configuration files or locally.
Configuration File
Local
Format Resolution
<=480*272
<=800*480
<y0000000000xx>.cfg
Web User Interface
Phone User Interface
Configuring Basic Features
Single File Size Total File Size
<=5MB <=20MB
<=5MB <=20MB
Specify the access URL of the
custom wallpaper.
For more information, refer to
Access URL of Wallpaper Image
on page 380.
Upload the custom wallpaper.
Change the wallpaper via web
user interface.
Navigate to:
http://<phoneIPAddress>/servlet
?p=settings-preference&q=load
Change the wallpaper via phone
user interface.
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