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Soft Spot Software that turns your wi-fi connection into a "phone line"? You bet, and it could save you big bucks.

By Mike Hogan

Opinions expressed by Entrepreneur contributors are their own.

As more phone traffic travels over the Internet, more computers will be doubling as telephones. Any Internet-connected desktop, laptop, tablet or PDA with a mic and speakers can become a softphone by adding a small inbox/dialer client that links to an Internet-connected server elsewhere.

Why bother? Because calls traveling exclusively over the Internet cost the same whether the other party is across the street, across the country or around the world- and that cost is usually zip, zero, nada.

Another reason is that, technically, the Public Switched Telephone Network (PSTN) and even cellular networks don't actually route calls to you personally; they call a handset. IP phone systems do a much better job of tracking you down wherever you may roam-and these days, more of us spend more time out of the office than ever before.