I just found this thread as I was looking for an answer.... most of these posters are not understanding... the guy wants to use his regular land line telephone service and a pc based program that works like a regular telephone while using a headset and microphone to make and receive calls. Windows dialer is cumbersome and ugly too...not very user friendly like a "phone" looking interface, and these answers of skype and other VOIP are missing the point...not thinking outside of the VOIP box so to speak. Not all calls made with a PC have to be VOIP...just like a fax program, I think this "communicate" program will work for phantom66... try this, I havent tried it...just found it 10 minutes ago...
ok so search for a program called COMMUNICATE! STANDARD v10.0
I couldnt post a link because I am new here.