Before setting up your Plantronics Savi W710 and W720 wireless headset, you need to identify what phone you have. This will help you go through the proper setup. Some phones have a dedicated headset port and others don't. Click the link to the guide that best describes your setup.
Also, keep in mind. If you have the HL10 Handset Lifter, follow the setup guide WITHOUT headset port.
Setup WITHOUT headset port
Follow this setup as well when using the Handset Lifter.
Setup WITH headset port