
4 System Information
Muting Headset During a Call | 
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  | Volume Up (+) and Down   | 
To mute a call, press and hold the volume + and - buttons | 
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simultaneously until you hear a status prompt. The sequence  | 
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will start with   | 
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English). The   | 
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mute is activated. The full sequence repeats every 30 minutes  | 
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until mute is   | 
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To unmute a call, press and hold the volume + and - buttons  | 
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simultaneously until you hear   | 
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prompt “Mute Off” (in English).  | 
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USB Adapter Indicator Light | 
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USB Adapter Status | Indicator Light | ||
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Headset in talk mode  | Flashes blue  | ||
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USB adapter and headset pairing  | Flashes red and blue  | ||
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Connected, no activity  | Solid blue  | ||
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Powered on - headset not paired  | Solid red  | ||
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Headset Controls and Indicators
Action | Indicator Light | Tone  | 
Power On/Off
Check if headset is powered on
Press Power/Off button 2 seconds
Short press call control button or volume + or - button
On: solid blue for 2 seconds  | On: ascending tone  | 
Off: solid red for 2 seconds  | Off: descending tone  | 
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Short blue flash  | None  | 
Incoming call  | None  | Flashes blue  | Three single low tones  | 
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Call answer/end  | Short press call control button  | Short blue flash  | Single low tone followed by low-  | 
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Adjust the volume (during a call)  | Short press volume + or -  | Single blue flash  | Tone at each change in volume.  | 
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  | Double tone when min/max  | 
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  | volume level reached  | 
Call indicator light  | With headset powered on, press  | 
(enable/disable)  | power, volume + and - buttons  | 
  | simultaneously for 1 second  | 
Turn indicator on: blue glow  | Single low tone  | 
increases for 2 seconds  | 
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Turn indicator off: blue glow  | 
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fades for 2 seconds  | 
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Reconnect after leaving range for Short press call control button  | Single blue flash  | Single low tone  | 
more than 30 seconds  | 
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Plantronics Voyager PRO UC User Guide  | 9  |