Plantronics APV-66 Savi/CS500 series EHS cable for Avaya Phones communicates electronically with the phone, eliminating the need for the HL10 lifter. Enabling you to remotely answer and end your calls without having to be at your desk.

Plantronics CS540, CS510, CS520, Plantronics Legend CS , Plantronics Savi WO100,   Plantronics Savi WO200,   Plantronics Savi WO300  Plantronics Savi WO350 , Plantronics Savi W740,  Plantronics Savi W710 , Plantronics Savi W720 ,  Plantronics Savi W730 ,  Plantronics Savi W745

Compatible with the following Avaya model phones:

• 2420, 4610, 4610SW, 4620, 4620SW, 4621, 4621SW, 4622, 4622SW, 4625, 4625SW, 4630, 4630SW, 5420, 5610, 5620, 5621

Also See Avaya direct connect headset page for reference

Avaya with sidecar: If have an Avaya sidecar with your Avaya 2420, 46XX, 5420 phone then the EU24 port on the phone is used by the sidecar. An APV 6A (older CS series), APV-63 (new CS, Savi Series) can be used instead of APV-6B and APV-66

Old Poly part # 38633-11

New HP part # 85R02AA