Yealink SIP-T54S Administrator's Manual page 220

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
Details of the Configuration Parameters:
screensaver.wait_time
Description:
Configures the time (in seconds) to wait in the idle state before the screen saver starts.
15-15s
30-30s
60-1min
120-2min
300-5min
600-10min
1800-30min
3600-1h
3200-2h
10800-3h
21600-6h
Note: It is only applicable to SIP-T54S, SIP-T52S, SIP-T48G/S, SIP-T46G/S and SIP-T29G IP
phones.
Web User Interface:
Settings->Preference->Screensaver Wait Time
Phone User Interface:
Menu->Basic->Display->Screensaver->Wait Time
screensaver.type
Description:
Configures the type of screen saver to display.
0-System
1-Custom
If it is set to 0 (System), the LCD screen will display the system screen saver images.
If it is set to 1 (Custom), the LCD screen will display the custom screen saver images (you
need to upload custom image files to the IP phone).
Note: It is only applicable to SIP-T54S, SIP-T52S, SIP-T48G/S, SIP-T46G/S and SIP-T29G IP
phones.
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Parameters Permitted Values Default
15, 30, 60, 120,
300, 600, 1800,
3600, 7200, 10800,
21600
0 or 1
21600
0