I trouble shot the matter with the Plantronics, it seems the CT14 is an analog phone and Comcast home phone service is all digital.

Not working, no matter what I do

The headset is uncomfortable no matter if you use the overhead piece or around the year

No matter where I place the main unit, there is a buzzing noise.

It works as it is supposed to

It falls a bit short of 5 stars because the volume isn't as adjustable as I'd like (callers come in pretty loud sometimes), and the buttons are pretty small for my fingers, but otherwise it has worked well so far, and has a good long battery life away from the base.

- works exactly as I had hoped

The phone frees the hands to be able to continue working as you carry your conversation

This model is great because it's not extremely high end but works as though it were