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SandBox: Voice Recognition
A dial-up
phone is an analog device. It transfers packets of sound over miles
of wire, even to space and back. Long distance calls are expensive,
however.
A computer is digital. It transfers packets of
information over the Internet: text, graphics, sound and video.
Voice Over IP, VoIP, uses high speed
Internet bandwidth to make
free long distance calls. There needs to be an interface between the
Internet and the phone. VoIP uses an analog to digital converter.
There are three connections to this device: power, digital, and
analog. The digital cable goes to the network router. The phone wire
plugs into any commercial phone.
You can get a phone number with VoIP, as well as the
familiar dial tone.
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