THE CELL PHONE

The cell phone

Definition: The mobile phone is an electronic wireless device to access and use network services or mobile cell phone. Cell is called in most Latin American countries because the service operates through a network of cells, where each relay antenna is a cell signal, although there are mobile phone networks.

First calla and first cell phone:

On Tuesday, April 3, 1973, nearly four decades ago, Martin Cooper walked down a street in New York when he decided to call. Actually, I wanted to test his invention. The electrical engineer Iliinois Institute of Technology and Motorola executive, took his DynaTAC 8000X (that device weighed over kilo and a half and its battery lasted only 20 minutes) and scored. The device received signal and Cooper heard the voice of Joel Engel, head of research and development of the rival company to tell from where I was making. Thus was made ​​the first call from a cell phone.

The view in the corner talking to a man with a 'box' to the ear caused surprise among the bystanders, perhaps the same as Cooper would experience by watching Captain Kirk, in an episode of Star Trek series, use your handheld communicator, which would be the inspiration to develop the system that would actually mobile.

The concept of mobile communications had been established since 1947 by Bell Laboratories, where he was Engel, but due to difficulties with the permission of the radio spectrum, the idea was not yet feasible. In 1960 Bell Laboratories and Motorola had decided to study the concept and implement the idea of ​​cell phone.

It was not until 1983 when the DynaTAC, a "brick" weighed 780 grams and measuring 33 x 9 x 4.5 inches, obtained permission to leave the market, and in that same year he implemented the first cellular system, from a technology in which the phone would send a signal to the receiving antennas. In those days an antenna covered 15 square blocks. As the user physically moved, transported central antenna signal antenna, so that the call has continuity.

The phone's battery lasted eight hours on standby, and must be recharged for 10 hours. In the late eighties Motorola launched a series of phones that came to replace the DynaTAC 8000X. It was not until the nineties when these phones significantly reduced their size and counted with longer battery life, the screens were more crisp and color.

operation:

  Telephone communication is possible thanks to the interconnection between mobile stations and public. According to the bands or frequencies at which operates mobile, able to function in one or another part of the world.

Mobile telephony is the combination of a network of stations transmitting or receiving radio (repeaters, base stations, or BTS) and a number of telephone switching 1st and 5th level (MSC and BSC respectively), which enables communication between portable telephone terminals (mobile phones) or between mobile computers and phones in the traditional landline.

In operation, the mobile phone communicates with a base station, and as it moves, the computer systems that manage the network will broadcast the call to the next base station transparently to the user. That is why it is said that the base stations form a network of cells, which the honeycomb, serving each base station to mobile teams that are in your cell.

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I chose the phones because for me they are an important part of my life. makes life it self, for example for those who are clueless and forgotten (like me) can have the calendar, alarms, until notepad. The phone that I have I (nokia c3-00) I use to listen to music, watch videos, download music, books, comics and light novels, using social media (wathsapp, facebook,

twitter, gmail, hotmail, yahoo, etc) and overall sail.

in my opinion I like this mobile phone as it contains wlan (wi fi application for use) and is very modifiable to your liking, in terms of tones, wallpapers (accepts gif and slides), menu order camibar and my favorite part is that support themes (which I do most of modifying them to my taste). I to mine I put a lot of games and applications, book reader, converter fees, up aplicacones for international radios.

I love my cell phone, organisarme helps me a lot, yet is my source of recreation.



prezi presentation : http://prezi.com/ttjtvxb60dlm/the-cellphone/