Self Test can be used to display information about the phone and to check operation of the lamps and display. The information may be required by your system administrator.
To perform a self test:
1.To exit any other mode, press 
EXIT and then press any 
below the display.
2.Press Option.
3.Press 
Self Test. A screen of information is displayed.
Caution
In the top row, the center of the display should show REL:2.00 or higher. If not the phone’s software needs to be upgraded. Consult your system administrator.
4.Press and hold Test. The screen lines should all go black and all the phone lamps should come on. If they do not ,consult your system administrator.
5.Release Test and do one of the following:
•To return to the options menu, press Done.
or
•To return to the call handling screen, press EXIT.