7.5.4  Activate/deactivate meeting mode (progressive ringing) 
  More options  
o  ▫ Progressive ringing   To activate. 
o  ▪ Progressive ringing   To deactivate. 
   End. 
   To adjust other audio features. 
7.5.5  Activate/deactivate discreet ring mode  
  ▫ One beep before ringing / ▫ Three beeps before ringing   To activate. 
  ▪ One beep before ringing / ▪ Three beeps before ringing   To deactivate. 
   End. 
   To adjust other audio features. 
7.5.6  Adjust ringer volume while a call arrives  
  Your telephone rings. 
   Adjusting the ringer volume. 
7.6  Adjusting the brightness of the deskphone 
Adjust the brightness of the display, the LEDs, the keys (add-on) and the logo light on the back shell 
(optional). 
7.6.1  Auto adjusting of the brightness 
The phone can adjust automatically the brightness of the display, the LED and the busy light logo on 
back shell (if exists) depending on the lighting conditions to improve user experience and achieve power 
savings (ambient light sensor). 
Auto adjusting of the brightness of the display 
   or  (long press)  Display   LED brightness auto 
  Aactivate or deactivate the feature.  
Auto adjusting of the brightness of the LED and the busy light logo on back shell (if exists) 
   or  (long press)  Display   Advanced  LED brightness auto 
  Activate or deactivate the feature.  
7.6.2  Adjust the brightness when the phone is in use 
   or  (long press)  Display   Brightness 
   Increase or decrease the brightness. 
   
   
7.6.3  Adjust the low brightness when the phone is not in use 
   or  (long press)  Display   Advanced  Low brightness 
   Increase or decrease the brightness.