Operational Features
5-26 41-001160-01, Rev 00, Release 2.3
IP Phone Administrator Guide
Backlight Mode (9480i, 9480i CT, 55i, 57i, and 57i CT only)
The 9480i, 9480i CT, 55i, 57i, and 57i CT have a backlight feature that allows you
to turn the backlight on the LCD:
• On (always on)
• Off (always off)
• Auto (off after a period of inactivity)
“The Auto” setting sets the phone to turn off the backlighting after a period of
inactivity. The period of time that the phone waits before turning the backlight off
is also configurable.
You can set this backlight feature using the configuration files and the IP Phone
UI.
Configuring the Backlight Mode Using the Configuration Files
Use the following information to set the backlight mode and backlight timer on
the IP Phones.
Configuring the Backlight Mode Using the IP Phone UI
Use the following procedure to set the backlight mode and backlight timer on the
IP Phone using the IP Phone UI.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section, “Backlight Mode
Settings (9480i, 9480i CT, 55i, 57i, 57i CT)” on page A-60.
IP Phone UI
Step Action
1 Press on the phone to enter the Options List.
2 Select Preferences.
3 Select Display.
