- NEC DSX headset adapter for Plantronics - Tightly integrates your headset system with the DSX to provide enhanced wireless mobility and call answering - Plantronics lifter not required - Compatible with all Plantronics wireless headset systems that support a handset lifter, including the CS55 series, CS70 series, Supraplus wireless series, and Voyager series - Compatible with DSX 34-button backlit display telephone Series 2 (or higher) and DSX 34-button Full Duplex backlit super display telephone NEC1091054