Build a Skype Server for Your Home Phone System: "One irritating feature of Skype is that it must be running on a computer for you to make and receive calls. That is, when your computer is off, Skype doesn't work. Moreover, when you run Skype on the computer you use day in and day out, Skype's performance (call quality, reliability and so forth) can suffer if you are doing other things that deprive it of the runtime resources it needs.
My solution was to build a Skype server that provides 24/7 phone service with the minimum of hassle and fuss. By dumping your regular phone company and taking back control of your home phone wiring using a Skype server, you will have not only a phone system with nearly the same capabilities as before—indeed, in some ways better—you will also save a bundle of money! In my case, I save a little less than $700 US each year (this year, next year, and the year after that, and so on), or about 82% off of my old phone bill."