Enjoy wireless freedom and get remote call control on your wireless headset from a wide range of NEC deskphones using an Electronic Hook Switch (EHS) cord. Answer or end calls, mute the microphone and adjust volume when you are away from the desk.The Jabra LINK™ 14201-31 enables remote Electronic Hook Switch Control (EHS) with Jabra wireless headsets and the NEC DT730 IP Phones.