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					Blackwire C210-M   
					Blackwire C220-M   
					USER GUIDE   
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				Powering On   
					2 
					Powering on the Blackwire C210-M and C220-M   
					The USB headset is automatically powered on when inserted into the USB port of the   
					computer.   
					2.1   
					2. Adjust the Headband   
					2.1 Lengthen or shorten the band until it fits comfortably. The foam cushions   
					should sit comfortably over the centre of your ears.   
					3 
					Headset Features   
					3.1   
					1 
					Adjustable Headband   
					Ear Cushion   
					Receiver   
					3.2   
					Boom   
					3. Adjust the Boom and Microphone   
					3.1 Rotate the boom so it is aligned with your mouth.   
					Noise-Cancelling   
					Microphone   
					Headset Cord   
					3.2 Shorten or lengthen the microphone so it is approximately two finger widths   
					from the corner of your mouth.   
					4 
					5 
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				Using Your Headset   
					Troubleshooting   
					Answering/Ending/Making Calls with Microsoft Office Communicator   
					To make a call, select a contact or dial the number via Microsoft Office Communicator.   
					To answer or end a call, simply press the call answer end button.   
					Problem   
					Solution   
					I cannot hear caller.   
					• The USB headset is not set as the   
					default audio device. To change audio   
					setup, refer to the Microsoft Office   
					Communicator user guide.   
					• 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.   
					Adjusting Volume   
					• 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-M/C220-M” as the voice device.   
					To increase listening volume, press the volume up (+) button. To decrease listening   
					volume, press the volume down (–) button.   
					To adjust the listen or speak volume of the Microsoft Office Communicator,   
					please refer to the softphone user documentation. It is recommended that the volume is   
					adjusted on the inline control and not the Windows volume control.   
					Sound in headset is distorted.   
					I can hear echo in headset.   
					• Lower the listen volume on your   
					softphone until the distortion disappears.   
					To adjust the speak volume of the audio device on the computer, use the Sound   
					and Audio Device section on the Control Panel.   
					• 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.   
					Muting a Call   
					To mute the microphone during a call, briefly press the mute button. When muted, the   
					Mute LED will be lit.   
					To unmute press the button again.   
					7 
					6 
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				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.   
					©2010 Plantronics, Inc. All rights reserved. Plantronics, the logo design, Blackwire, and Sound Innovation are trade-   
					marks or registered trademarks of Plantronics, Inc. Microsoft is a registered trademark or trademark of Microsoft   
					Corporation in the United States and/or other countries. All other trademarks are the property of their respective   
					owners.   
					Patents US D540777; D540778   
					82874-01 (03.10)   
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