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Dial N for net phone.(Putting technology to work for you)

Technology Review

| March 01, 2004 | Garfinkel, Simson | This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

I FIRST HEARD ABOUT INTERNET TELEPHONY BACK in 1985, when MIT professor Steven Burns told me about an "Etherphone" that some researchers at Xerox had created to send voice over a computer network. The system worked by taking a person's voice, digitizing it, breaking that digital data into packets, and finally sending those packets over a high-speed network. At the other end, another Etherphone reversed the whole process. Neat technology, I thought, but far too computationally intensive and wasteful of resources to ever be practical.

How wrong I was. In the past 18 years, computers have gotten more than 1,000 times faster and networks nearly 100 times faster, but the human voice has remained basically unchanged. As a result,…

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