According to the avaya web site the version s2.0 has screen saver support. I updated my test set, download the latest 46xxsettings doc. I changed the the screen saver to activate in 1 minute however the default avaya screen saver is still on. The test123.jpg file is 141X61 4k.
################ AVAYA SCREEN SAVER SETTINGS ###################
##
## Idle time before the Avaya Screen Saver is activated (minutes).
## Number of minutes without phone activity to wait
## before the screen saver is activated. A value of 0 means
## the screen saver is never activated. The default is 240 minutes.
## This parameter does not apply to 16cc SIP phones.
##
## Note:
## This setting activates the Avaya Screen Saver which is
## different than the "idle screen" accessed by WMLIDLEURI.
## While it is possible to use WMLIDLEURI as an "idle
## screen", it is recommended that the SCREENSAVERON
## timer and the Avaya Screen Saver display be used for
## screen saver purposes.
##
SET SCREENSAVERON 1
##
## The filename of a valid JPEG customized screen saver image.
## 0-32 ASCII characters
##
SET SCREENSAVER C:\Program Files\Avaya\MV_IPTel\data\HTTPdata\test123.jpg