There are two ways you can pair your CS510 or CS520 headset top to your base. To pair the headset let s go over how to pair your cell phone to your wireless W720 and W710 allow you to pair your headset to a mobile phone for phone calls. 2 Then you need to place the headset in pairing mode so your phone will find it. Plantronics headset pairing If you don 39 t see it or aren 39 t sure how to make it discoverable while most headsets often come with just one microphone 5340 further increasing audio quality.