With active sensors putting on the headset will:  taking off the headset 
will: 
Mobile/softphone call answer the call keep call in headset
Music/media resume music/media (if playing 
previous to taking off)*
pause music/media (if 
playing)*
Mute (activate in Poly Lens 
App )
unmute if on an active call mute if on an active call
Note:  *Functionality varies by application. May not function with web-based apps.
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