Plantronics APV-63 38734-11 EHS Adapter (Avaya),Electronic Hook Switch Adapter

Plantronics APV-63 EHS Adapter (Avaya) Plantronics APV-63?for remote desk phone call control (answer/end). This Plantronics APV-63 Ehs Adapter cable eliminates the need for a HL10 Handset Lifter. This?Plantronics APV-63 Electronic Hook Switch Adapter cable works with Avaya desk phones and may work with additional manuf