For Avaya telephones:
This lightweight and practical cable connects to your telephone to allow you to answer and end calls with your Plantronics headset when you are away from your phone. It is completely electronic and therefore does not require a mechanical device to lift the handset.
Compatible with the following Avaya telephones: 2420, 4610SW, 4620, 4620SW, 4621SW, 4622SW, 4625SW, 4630SW, 5420, 5610, 5620
Compatible with the following Plantronics headsets: Savi Office, CS500 Series, Savi 700 Series, MDA200