T41P with EHS36

[Dabo]

I have a Yealink T41P that I am using together with a Plantronics CS540 headset. I have absolutely no problems using the two together.

I purchased a Yealink EHS36 so that I could answer the phone remotely, but the connection is unusable. The parties can hear each other, but there is so much static and cut-offs that people just hang up on me (apparently it's even worse on their end than on mine).

I have tried the different settings on the headset, but there is no setting that makes this better.

Is there a solution to this, or is the EHS36 unusable with this phone?

Thanks for any help you can provide.