Cellular phones have come a long way since they were first introduced in 1981. In 1981, less than 1% of the U.S. population was using cell phones. Now, in 2002, over 40% of the U.S. population owns a cell phone. Cell phones have become so commonplace that people are starting to use these gadgets as their primary mode of communication and completely disconnecting their local home phone service. With these convenient electronics, people can make phone calls from their home or practically anywhere on the planet to anybody in the world. As the world starts to take advantage of cell phones, it is important to get an understanding of how these intriguing instruments work. Most of today’s phones and services use digital technologies to communicate. Digital service is a method of encoding information using a binary code of 0s and 1s and transmitting this information as “on” or “off” transmissions. There are three major digital technologies used in the U.S. to transmit digital......
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Approximate Word Count: 1460
Approximate Pages: 6 (260 words per double-spaced page) |