Yealink SIP-T54S Administrator's Manual page 224

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
Select System from the pull-down list of Screensaver Type.
2.
Click Confirm to accept the change.
3.
To configure the screen saver wait time and screensaver display clock via web user
interface:
Click on Settings->Preference.
1.
Select the desired time from the pull-down list of Screensaver Wait Time.
2.
Select the desired value from the pull-down list of Screensaver Display Clock.
3.
Click Confirm to accept the change.
4.
To configure the screen saver via phone user interface:
Press Menu->Basic->Display->Screensaver.
1.
Press
2.
198
or , or the Switch soft key to select the desired wait time from the Wait