The Polycom Touch Screen VVX500 Phone has two different main menu options for the Backlight: Backlight Intensity and Backlight Timeout. 

The Backlight Intensity menu has 3 sub-menus:

  • Backlight On Intensity - the brightness of the screen when there is activity
  • Backlight Idle Intensity - the brightness of the screen when there is no activity
  • Maximum Intensity - the brightness scale that applies to both Backlight On and Backlight Idle intensities.

Backlight On Intensity

  1. Press the Home button
  2. Tap the Settings option
  3. Tap Basic
  4. Tap Backlight Intensity
  5. Tap Backlight On Intensity
  6. Tap to choose High, Medium, or Low

Backlight Idle Intensity

  1. Press the Home button
  2. Tap the Settings option
  3. Tap Basic
  4. Tap Backlight Intensity
  5. Tap Backlight Idle Intensity
  6. Tap to choose High, Medium, or Low

Maximum Intensity

  1. Press the Home button
  2. Tap the Settings option
  3. Tap Basic
  4. Tap Backlight Intensity
  5. Tap Maximum Intensity
  6. Tap to Down or Up in the bottom bar to set the intensity level

Backlight Timeout

  1. Press the Home button
  2. Tap the Settings option
  3. Tap Basic
  4. Tap Backlight Timeout
  5. Choose the number of seconds until your Backlight Timeout Settings take effect