Troubleshooting
Headset
I can't hear anything in the
headset.
Ensure your headset is powered on.
Press the headset Call button.
Make sure your headset is charged.
Fine tune the listening volume.
Ensure that your headset is the default sound device by going
to your Sound Control Panel (Windows) or your Sound
System Preferences (Mac).
Make sure your headset is subscribed to the DECT USB
adapter. See Subscribe D400 USB adapter again on page 7.
When should I replace my
rechargeable battery?
Replace your rechargeable battery after 3 years or 300
charge cycles, whichever occurs first.
Talk time performance is
significantly degraded even after
a full recharge.
Battery is wearing out. Contact us at poly.com/support.
Softphone
When I dial from my softphone
application, nothing happens.
Ensure your headset is powered on.
Press the headset Call button.
Make sure your headset is charged.
Fine tune the listening volume.
Ensure that your headset is the default sound device by going
to your Sound Control Panel (Windows) or your Sound
System Preferences (Mac).
Make sure your headset is subscribed to the DECT USB
adapter. See Subscribe D400 USB adapter again on page 7.
Ensure that the Poly Lens Desktop App is installed. To
download, visit poly.com/software.
Ensure that you are using a compatible softphone
application. For a list of compatible softphones, visit
poly.com/software.
If the Poly Lens Desktop App is not installed and you do not
have a compatible softphone, you must first press the
headset Call button and then use the softphone interface to
place/answer/end calls.
Restart your computer.
How do I interact with Microsoft
Teams or Skype for Business?
• For Microsoft Teams, tap the Call button to interact
(Teams app required).
• For Skype for Business, press and hold the Call button
for 2 seconds to interact (Skype for Business app
required).
• Set your target softphone by going to Poly Lens Desktop
App.
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