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User Guide SoundPoint IP 550 Phone
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Changing the Backlight Intensity
Backlight intensity on the SoundPoint IP 550 phone has three components:
• Backlight On
• Backlight Idle
• Maximum Intensity
You can modify the Backlight On intensity and the Backlight Idle intensity
separately. You can select high, medium, low, and off levels for both.
When you modify the Maximum Intensity, you are modifying the entire
backlight intensity scale. For example, if you decrease the Maximum Intensity,
the low, medium, and high values for both Backlight On intensity and the
Backlight Idle intensity decrease.
The Backlight On intensity applies for the following events:
• Any key press
• Hookswitch release
• Incoming calls
• Ending a call, holding a call, resuming a call by the other party
• A voice or instant message received
If you do not press any keys on the phone after 20 seconds of the backlight
turning on, the backlight dims (or changes) to medium in the following cases:
• A call is in progress
• A call is on hold
• There is an incoming call (ringing)
• There is an outgoing call (ringing back)
• Any menu shows on the display
In all other cases, the Backlight Idle intensity applies.
To modify the backlight intensity:
1. Press .
2. Select Settings > Basic > Backlight Intensity.