T48G, EHS36 and Plantronics CS510

[cmedvick]

I had 35.83.0.60 and then upgraded to 35.83.0.130 but same results. The button on the headset does not draw dial tone when the phone is idle/on hook. The light on the Plantronics base goes on as if it is off hook but the phone itself does not go off hook. This is for both incoming and outgoing. Also for incoming, i do not hear the incoming call tone/beep in the headset. Interestingly if I call inbound I hear nothing in the headset and if I press the button on the earpiece while the call is ringing in, then I hear actual ringing in the headset but it does not answer the call. I should hear a ringing "alert", and be able to press the button on the headset to answer the call.