Yealink SIP-T4U Series

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Custom Screensaver Picture Limit
Either the smaller or the larger picture will be scaled proportionally to fit the screen. The screensaver 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/T29G
<=1.8 mega-
pixels
<=5MB
Screensaver Configuration
The following table lists the parameters you can use to configure screensaver.
Parameter
screensaver.wait_time <y0000000000xx>.cfg
Description
It configures the time (in seconds) to wait in the idle state before the screen saver starts.
Permitted
Values
15-15s
30-30s
60-1min
120-2min
300-5min
600-10min
1800-30min
3600-1h
7200-2h
10800-3h
21600-6h
Default
21600
Web UI
Settings > Preference > Screensaver Wait Time
Phone UI
Color Screen Phones:
Menu > Basic > Display > Screensaver > Wait Time
Black-and-white Screen Phones:
Menu > Settings > Basic Settings > Display > Screensaver > Wait Time(s)
Parameter
screensaver.display_clock.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to display the clock and icons when the screen saver starts.
Note: It works only if “screensaver.type” is set to 0 (System) or 1 (Custom).
Permitted
Values
0-Disabled
1-Enabled