The Public Switched Telephone Network (PSTN) is the old-fashioned phone system that paved the way for communication.

Voice over Internet Protocol, commonly referred to in the telecommunications world as VoIP, is a phone solution that is affordable, flexible, and technologically advanced.

My mother often calls my sister in college via Skype, and I can hear them yelling at each other through their computer screens when I happen to be visiting mom.

If you want a home phone for personal calls, or if you run a very small, home-based business, you might be fully satisfied with a very low cost VoIP solution from Skype or Google.