Jabra EHS-Adapter for PRO 9400, PRO 920, for Panasonic device Series, see memo

Control your Panasonic phone from your Jabra headset
The Jabra LINK 14201-40 enables remote Electronic Hook Switch Control (EHS) with Jabra wireless headsets and the Panasonic IP Deskphone KX-NT553 & 556 and Digital Deskphones KX-DT543 & 546. Jabra wireless headsets with EHS functionality boost productivity as they provide the user with the ability to answer and end a call, while away from their desk.