Plantronics EHS APP-51 for Polycom Phones Product # 38439-11 The Plantronics APP-51 electronic hookswitch cable helps you communicate electronically with your phone. This switch allows 1 touch remote call/answer with Savi wireless headset systems. It eliminates the need for a HL10 lifter.
APP-51 Features: Electronic Hookswitch Cable Communicates Electronically w/ the Phone Eliminates the Need for a HL10 Lifter Compatible with all Plantronics Wireless Headsets For Polycom Phones