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Problem Solution
I cannot hear caller.
• The USB headset is not set as the default
audio device. Use the Audio settings
in Windows under Sounds and Audio
Devices to select “Blackwire C210/
C220” as the audio device.
• Listening volume is too low. Press the
volume up button on the headset.
Callers cannot hear me.
• Headset is muted. Press the mute
button on headset to unmute the
microphone.
• Headset microphone boom aligned
incorrectly. Align the headset boom with
your mouth.
• The USB headset is not set as the
default Voice device. Use the Voice
settings in Windows under Sounds
and Audio Devices to select “Blackwire
C210/C220” as the voice device.
Sound in headset is distorted.
I can hear echo in headset.
• Lower the listen volume on your
softphone until the distortion disappears.
• Adjust volume on headset.
The other headset I was using to
listen to music does not work any
more.
• The USB headset will set itself as the
default audio device in Windows. Use
the Audio settings in Windows under
Sounds and Audio Devices to change
the device used for audio.
My headset stops responding
to button presses.
• When a PC goes into standby or
hibernation, the USB headset no longer
is powered on. Be sure your PC is in an
active state.
My headset does not work with the
headset I am using on my PC. (I cannot
answer or disconnect from the headset
call button).
• Check compatibility list on
plantronics.com/software to ensure
your softphone is compatible for remote
answer and disconnect.
• When a PC goes into standby or
hibernation, the USB headset is no longer
powered on. Be sure your PC is in an
active state.
• Be sure Plantronics software is installed
and running.
Troubleshooting
8
©2010 Plantronics, Inc. All rights reserved. Plantronics, the logo design, Blackwire, and Sound Innovation are
trademarks or registered trademarks of Plantronics, Inc. Windows is a registered trademark of Microsoft Corporation
in the United States and other countries. All other trademarks are the property of their respective owners.
Patents US D540777; D540778
82874-16 (03.10)
Plantronics, Inc.
345 Encinal Street
Santa Cruz, CA 95060
United States
Tel: 800-789-4971
plantronics.com
For product support contact us at plantronics.com/support.