The Plantronics APC-4 HHC Adapter enables remote Headset Hookswitch Control (HHC) with Plantronics wireless headsets,and the latest generation of Cisco Unified IP phones. This means that users can answer and end calls up to 300 ft. away from their desks. The seamless integration of handset and headset allows users to benefit from enhanced mobility and the ability to multitask while on a call. The wireless freedom improves work efficiency and ergonomics througout the day. The Plantronics APC-4 Adapter is a plug-and-play solution that converts from the HHC standard used in Cisco phones – and vice versa.