magicJack is a device that plugs into a USB port on the user's computer. It uses a standard RJ-11 phone jack into which any standard phone can be plugged. This allows the user to make phone calls to any phone in the U.S. and Canada for a fixed charge.
It is a computer peripheral that, in combination with telephony service from the related YMAX Corporation, provides Internet-based telephone service (VoIP) to the United States and Canada. The firm's primary product is a USB device that holds both the software necessary to place Internet-based telephone calls via a customer-supplied high-speed internet connection, and electronics (technically known as a SLIC, or Subscriber Line Interface) supporting conventional landline telephones to be plugged directly into same device. The products are promoted through television infomercials and a website.
The company's website attributes the invention of magicJack and the founding of YMAX to Dan Borislow, who has numerous patent claims pending on voice-over-IP (VoIP)-related technology.
The magicJack device works exclusively with the company's captive landline supplier and CLEC (Competitive Local Exchange Carrier), YMAX.
Source: http://en.wikipedia.org/wiki/MagicJack
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