Cell phones

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Teacher: Ma. Eugenia Jiménez

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Brenda Novillo
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CELL PHONES

The mobile phone (also called a mobile, wireless, cellular phone, cell phone, or hand phone (hp)) is a short-range, portable electronic device used for mobile voice or data communication over a network of specialized basestations known as cell sites.

In November 2007, the total number of mobile phone subscriptions in the world reached 3.3 billion, or half of the human population, which also makes the mobile phone the most widely spread technology and the most common gadget in the world.

In addition to the standard voice function of a telephone, current mobile phones may support many additional services, andaccessories, such as SMS for text messaging, email, packet switching for access to the Internet, java gaming, bluetooth, infrared, camera with video recorder and MMS for sending and receiving photos and video.

HISTORY OF CELL PHONES

← One of the most interesting aspects of the cell phone is that it is only a radius - extremely sophisticated, but a radius ultimately.

← The telephonewas invented by Alexander Graham Bell, and the wireless communication has roots in the invention of the radius as Nikolai Tesla in the decade of 1880 (formally presented in 1894 by an Italian young man called Guglielmo Marconi). It was of be hoping that one day both technologies were combined in the same device.

← In the epoch to the cellular telephones, the people who really needed mobilecommunication had to trust in the use of radio (radius)-telephone in their cars.

← In the system telephonic radio (radius), a central antenna existed only for every city, and probably 25 available channels in the tower.

← This central antenna was meaning that the telephone in the vehicle would need a powerful antenna, it sufficiently powerful to transmit to 50 ó 60 kms. of distance.This also was meaning that not many persons could use the radius - telephone since simply sufficient channels did not exist to connect

← In 1986 Puerto Rico Telephone places to the forefront of the telecommunications in the Carib, since it begins to offer cellular service to their clients. It is a reason, that millionaire establishes an infrastructure to carry out this project of greatimportance and to start establishing channels, but with name and configuration completely different from the channels of optical fiber, for mentioning someone.

Evolution of Cell Phones

Heftier: Motorola DynaTAC 8000X (1982).
In 1973, Motorola showed off a prototype of the world’s first portable cellular telephone

Heftier: Nokia Mobira Senator (1982).
It may look more like a boombox than aportable phone

Pre-iPhone: BellSouth/IBM Simon Personal Communicator (1993).
A cell phone with added PDA functions isn't news today. But in 1993, it was a novel idea.

Ahead of Its Time: Motorola StarTAC (1996).
Before the Motorola StarTAC was introduced in 1996, cell phones were more about function than fashion. But this tiny, lightweight phone ushered in the concept that style was just asimportant, ultimately paving the way for today's sleek-looking phones like the Motorola Razr

DotComs Ran on These: Nokia 6160 (1998) or Nokia 8260 (2000).
In the late 1990s, Nokia's candybar-style cell phones were all the rage. Sporting a monochrome display, an external antenna, and a boxy, 5.2-inch tall frame, the Nokia 6160 was the company's best-selling handset of the 1990s.

Early SmartPhone: Kyocera QCP6035 (2000)
If you're one of the many fans of the Palm OS-based Treo phone, you might want to thank Kyocera.

PDA to Phone: Handspring Treo 180 (2001).
Back when Palm and Handspring were still rivals, Handspring made waves with the Treo 180.

Swivel It: Danger Hiptop (2002).
Before the T-Mobile Sidekick became Hollywood's "it" phone, it was known as the Danger Hiptop....
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