Plantronics APV-63 Features Connects your Avaya Digital or IP phone to Plantronics CS500, Savi 700, and Savi Office series wireless headsets Provides remote one-touch answer/end call control for your wireless headset Eliminates the need for an HL-10 handset lifter Includes connector for existing online indicator (OLI) lights Compatibility Avaya Digital Phones - 2410, 5410, 6416D+M, 6424D+M Avaya IP Phones - 1408, 1416, 1608, 1608-I, 1616, 1616-I, 4630, 9608, 9620, 9620L, 9620C, 9630, 9630G, 9640, 9640G, 9650, 9650C Wireless Headsets - CS510, CS520, CS530, CS540, W710, W720, W730, W740, W745, WO100, WO200, WO300, WO350