Ooohhh, got it...I understand now. I use a Uniden phone system. This one:
Uniden Phone System
I bought this one at Costco, but the one I bought came with the base station and 2 extra headsets. I had Logitech a while ago but it sucked so I returned it and bought the Uniden. I have had no problem with the Uniden. Good sound, lots of features. I am very happy with it.
Hope that helps.