Getting to know your telephone   
8AL90399ENAD ed01     26/141 
Display 
Use this menu to adjust the display of your set: 
•  Auto-Brightness 
When this option is checked, the phone automatically adjusts the brightness of the display 
depending on the lighting conditions to improve user experience and achieve power savings 
(ambient light sensor). 
•  Brightness 
Adjust the brightness of the display, the LEDs and the logo on back shell (optional). 
•  Screensaver 
Set the delay before the brightness is dimmed when the phone is not in use. 
•  Night mode 
When night mode is activated, all the lights (LEDS and display) of the desk phone in idle state 
are turned off as soon as the ambient light drops below a defined threshold. 
•  Keyboard 
Define the lower screen to be displayed by default (ALE-500) 
•  Advanced 
→
 Low brightness 
When the phone is not in use, the brightness is dimmed. Adjust dimmed brightness. 
•  Advanced 
→
 Busy light 
Activate/deactivate the light of the logo on back shell (optional). The logo on back shell can 
be illuminated. The color changes when you are busy.  
•  Advanced 
→
 Adaptive LED 
When this option is checked, the phone automatically adjusts the LED brightness and the 
busy light logo on the back shell depending on the lighting conditions to improve user 
experience and achieve power savings (ambient light sensor). 
•  Advanced 
→
 Proximity sensor 
When this option is checked, the phone automatically detects when you approach it and 
switches to the idle state on the homepage (screen saver off and backlight on). 
•  Advanced 
→
 Prox. Sensitivity 
When the proximity sensor is enabled, you can define the proximity sensitivity (Low, Mid, 
High).