Owner's Manual
is ideal for most users. However, if you experience interference from other communication 
devices during your calls, you may want to switch to the Low or Very Low modes. Changing to 
Low or Very Low power modes will reduce the range of your headset.
Power mode Range* DECT Range* US DECT
Normal Up to 100 m Up to 300 ft
Low Up to 50 m Up to 150 ft
Very Low (V. low) Up to 20 m Up to 60 ft
* In typical offi ce environment
 Note: The Normal power mode is the default setting.
  To change the range/power mode:
1.   Use 
34
 to locate the range/power mode menu   on base display.
2.  Use 
5
6
 to select one of the 3 modes from the menu.
3.  Press OK to confi rm the new mode.
  2.5.4 Sound mode selection 
This menu is split into two sections: “Treble/Normal/Bass” and “Fixed/Switch”. These two 
sections are separated by a blank line. It is possible to choose one mode in each of the two 
sections. 
Your headset offers 3 treble/bass modes (Treble, Normal and Bass). You can change these to 
suit your personal preferences or needs, and seperately determine the USB sound quality.
Sound mode Effect Benefi ts
Treble Accentuates high tones Ideal for users with slight high-
frequency hearing loss
Normal Accentuates all tones evenly Ideal for all users
Bass Accentuates lower tones Ideal for users preferring a bass-
rich sound 
 Note: The Normal mode is the default setting.
Sound mode Effect Benefi ts
Fixed Speech quality in headset loudspeaker as known 
from traditional telephones (narrowband)
Improved talk time in USB mode
Switch Automatically switches between wideband or 
narrowband sound quality. In conference call 
mode, automatic switching is disabled.
Enhanced USB sound quality
7










