Plantronics HW251 Replaced by Plantronics HW510V Headset Plantronics recently announced the Plantronics SupraPlus HW251 Corded Headset has been discontinued and is no longer available now that supplies have run out. The current replacement as of August 28, 2019 is the Plantronics EncorePro HW510V Headset: Plantronics HW510V Corded Headset: The Plantronics EncorePro HW510V business grade headset is an all-new generation of headsets … Continued