Corded USB Headsets:
Plantronics Blackwire C310-M SfB Quick Setup Guide
Plantronics Blackwire C310-M SfB Quick Setup Guide for Mac
Plantronics Blackwire C310-M & C320-M User Guide
Plantronics Blackwire C510-M User Guide
Plantronics Blackwire 5220 & 5210 User Guide
Plantronics Blackwire C725-M User Guide
Jabra Evolve 40 User Manual

1. Adjust listening volume on headset (or your speaker): press the up volume button on headset or speaker control.
2. Adjust listening volume in Windows: from Windows desktop > left-click Speaker icon (beside time clock in lower-right corner of screen) > left-click and drag slider to adjust volume.
3. Adjust listening volume in SfB: left-click the audio icon at the bottom-left corner of main SfB window > Audio Device Settings > verify your headset or speaker is selected in top drop down menu > adjust speaker slider.

1. Headset or speaker device could be on mute: if it’s a corded headset, mute control is inline next to answer/end button.
2. Microphone placement is key “ if not properly positioned the result can be low or no transmit, and/or echo and feedback. Microphone position is also crucial for proper noise cancelling.To correctly position microphone on corded headsets, bend the microphone boom within 1-2 finger widths from the corner of mouth.
   Check to see which audio device is picking up your voice. It is possible that your voice is being picked up by your laptop or camera microphone, or another headset or speakerphone.
3. Verify Windows sound settings: from Windows desktop > right-click (not left-click) on Speaker icon (beside time clock on bottom tool bar in lower-right corner of screen) > select Playback devices > select your device in the list “ look for a green check icon next to it “Default Device”. Do the same in the Recording tab to the right of Playback tab.If your device is not set as the default device, it needs to be changed: right-click on your device in the list > select “Set as Default Device”. Do the same in the Recording tab to the right of the Playback tab.

1. Adjust speaking volume in SfB: left-click the audio icon at the bottom-left corner of main SfB window > Audio Device Settings > verify your headset or speaker is selected in the top drop down menu > adjust microphone slider.
2. Adjust listening volume on headset or speaker: press the down volume button on headset or speaker control.
3. Adjust listening volume in Windows: from Windows desktop > left-click Speaker icon (beside time clock in lower-right corner of screen) > left-click and drag slider to adjust volume.
4. Adjust Sidetone in Windows (this works with corded headsets only). From Windows desktop > right-click (not left click) Speaker icon (beside time clock in lower-right corner of screen) > select Playback devices > right-click on  your headset model in the list > Properties > Levels tab > adjust sidetone slider.

Microphone placement is key “ if not properly positioned the result can be low or no transmit, and/or echo and feedback. Microphone position is also crucial for proper noise cancelling.To correctly position microphone on corded headsets, bend the microphone boom within 1-2 finger widths from the corner of mouth.

Check to see which audio device is picking up your voice. It is possible that your voice is being picked up by your camera microphone, laptop microphone, or another headset or speakerphone.

Verify Windows sound settings: from Windows desktop > Right-click (not left click) on Speaker icon (beside time clock in the lower-right corner of screen) > select Playback devices > select your device in the list “ look for a green check icon next to it and the words Default Device. Do the same in the Recording tab to the right of Playback tab.

If your headset or speaker is not set as the default, it needs to be changed: right-click on your device in the list > select Set as Default Device. Do the same in the Recording tab to the right of the Playback tab.

There was a computer update, now my headset does not work