T48G + EHS36 + Sennheiser Officerunner help

[quebert]

I know Yealink's supported wireless headset list doesn't list the Officerunner, but I was told elsewhere it works. I bought it and am trying to get it to work. I wired the phone up how Yealink shows in the EHS36 manual, when my phone rings I hear the headset beep, but it's not answering when I press the button. I was guessing I need a handset lifter, even though the manual doesn't show as needing one for a Sennheiser headset, just the Sennheiser Y-Cord. I tried lifting the handset to make a call and press the button and it's still not switching to the device. I tried setting the DIP switches with 1 up and 2 up. Nothing.

I'm assuming the Officerunner setup and how it works should be the same as the DW Pro & other Sennheiser wireless headsets. My question is for anyone who has a Sennheiser wireless headset. How did you get it to work? On the Officerunner base I just have a cable plugged into the phone jack, should I have something plugged into the headset jack?

Correct me if I'm wrong, but isn't the point of the ESHS36 to eliminate the need for the handset lifter? The phone has a headset port on the back. If I need a HS 10 to lift the handset, will I still need the EHS36?

My phone + the headset have both been upgraded to their latest firmware