This is the Plantronics APN-91 EHS cable for for remote desk phone call control (answer/end). This cable eliminates the need for a HL10 Handset Lifter.This cable works with NEC DT series Phones.

It is compatible with Plantronics CS540, CS510, CS520, CS530, Savi WO100, Savi WO200, Savi WO300, Savi WO350 , Savi W740, Savi W710, Savi W720, Savi W730 , Savi W745, Voyager Legend CS, MDA200 USB, MDA220 USB

This EHS adapter only works with the following phones.

DT 330/430, DT 730, DT 750, DT 830/830G

1 year warranty

NEC Setup Guide: http://www.businessmachine.com.hk/userfiles/files/APN-91_NEC.pdf