Voice Quality of Headset Jack T22P

[T22P Guy]

I have noticed, after some testing, that the incoming audio quality through the headset jack is not as good as the the quality through the handset jack. The same is true for the outgoing audio. (I have tried the Yealink headset but now use my Plantronics since it sounds better). I am now using a Plantronics M22 between the headset and the phone, but the difference in quality is the same as with the headsets connected directly to the phone.

This is a big deal for me as I spend most of my day on the phone with my headset.

I have set up my headset to work through the handset jack, to take advantage of the better quality. The disadvantage is that I have to physically lift the handset to go off hook to make calls.

I love this phone, but this feature is very annoying. Is there anything that can be done to improve the audio quality through the headset jack?