We have a client who is moving from Norstar phones and headsets where they are able to answer and end calls from their wireless headset. They ordered Plantronics Savi W745 headsets and while they work on the Avaya IPO softphone, they cannot answer nor end the call from the headset. We checked with the Plantronics Spoke remote call control software and it does not show IPO softphone as compatible. Plantronics was of no assistance in this issue. Does anyone know of a headset model (USB, Wireless) that will do the answer/end features from the headset?