Senin, 10 Januari 2011

phone of history

phone of history
In the 21st century, telecommunications has entered an era that was so terrible. When some twenty years ago a home phone is still a luxury item, now that his name mobile phone (mobile phone) has been an everyday item. The price is becoming cheaper to make mushroomed. But, did you know that behind all this is the energy transfer events that are still so phenomenal

Who does not know mobile phones or mobile phones (mobile phone)? Introduced in the 1980s, now has this been happening communications equipment supplies daily. Many people in many big cities in particular, young and old are often seen flaunt it if you're not in use. Placed in the pocket of pants, tucked in the waist, or some are deliberately continue to be held while occasionally used for pointing. The price is already more affordable to make these goods can be owned not only by the-rich only.

Whatever it is, which means more cute and attractive size has also been regarded as a 'friend' on the road or in the activity that is very practical. He can connect us with relationships, colleagues, even with the boss sternly from anywhere. Telecommunication technology has enabled it could be used anywhere. Especially with the launch of satellite-satellite provider, which in turn allows small objects can be used in remote areas (remote areas), even from the middle of the ocean. One that makes it superior to a home telephone, ie it is without a cable or wireless.

The revolution in telecommunications sector has indeed reached the stage of the mighty. When daily activities has been so overlaps (overlap), this advanced equipment subsequently become a decisive tool. It can be used as a messenger and important news than as a medium for light conversation, in which young people used to call 'chat slang'.

However, did you know that to reach this stage, hundreds of engineers have spent many years in laboratoirum to uncover the mysteries behind it. Starting from studying the mysteries of electromagnetic waves, radio waves following the nature of their classification, until the air or atmospheric parameters become info media. All of this is related to the energy transfer invisible, so anything related to it can still be called a natural phenomenon. If in the city within a certain time interval there are two million people conversing with colleagues via cell phone, we never really understand how solid or spark a wave of electromagnetic radiation caused by milling each other.
The phone itself is actually not the equipment that is really sophisticated. This tool is basically just a radio transceiver (transmitter-receiver/sender and receiver) ordinary, like a walkie-talkie or Handie-talkie that often become standard equipment the police or security officers. The main part of telecommunication equipment is oscillator to generate radio signals, radio frequency amplifier, mixer (mixer), enumerators wave (detector), and an audio signal amplifier.

Then why is called a mobile phone? This title seems to depart from the stretch of signal booster antenna network built RBS (radio base station) which become tools and spreaders signal catcher. For a city, network provider or so-called provider (whether or Satelindo Telkomsel) ordinary share in the form of cells that form an imaginary, where each cell will be represented by an antenna RBS. That's why mobile phone (mobile phone) is then also known as cellular phones.

The smaller the
Trace back, in its history, both mobile phones and other wireless telecommunications equipment, principally related to the results of experiments conducted two scientists named James Clerk Maxwell (1831-1879) and Heinrich Hertz (1857-1894). Maxwell managed to uncover some of the natural phenomena of electromagnetic waves which asserts, that the speed of magnetic-electric wave radiation is equal to the speed of light propagation, which is about 186,000 miles (300,000 kilometers) per second. Meanwhile, on different occasions, Hertz complement the results of scientific studies reveal Maxwell, that radio waves are part of this natural phenomenon. To appreciate the hard work of Hertz, the world scientific community and then using the name 'Hertz' as the unit of frequency or vibrations per second.

In the different characteristics and functions, electromagnetic waves themselves can disaggregated by its spectrum becomes (starting from the largest wavelength to narrowest): radio waves, micro, infrared, light / visible light, ultraviolet, X rays and gamma rays . In particular, radio waves occupy the wavelength region from several kilometers up to 0.3 meters, while the frequency of several Hertz to 10 ^ 9 Hertz. The wave is then broken down to thousands of channels and is used internationally for various purposes under the supervision of the International Telecommunication Union.

Initially, the radio itself is only used a limited circle in the army. Form the first handheld radio in the beginning are still at-large and heavy brick. With form like this, he is still far from practical. However, the benefits of high makes use anywhere. In the field of battle it can be used as a sender equipment orders, the results of reconnaissance, and command a very strategic. In the event of World War II, the shape and strength repaired many times. In the decade of the 70s, the shape can be minimized with the invention of transistors that can represent a few tens of components are large, and by the 80s again with the less successful creation of the integrated circuit that is able to contain a few tens or even hundreds of electronic component in the Components of only shirt button. This finding makes telecommunications equipment become increasingly bermasyakat because production costs are becoming increasingly cheaper and more extensive benefits. Digital technology also makes these devices more attractive.

In the history of telecommunications, Indonesia itself was sticking out as the fourth country in the world of communications satellite users after the United States, Soviet Union, and Canada. The first satellite named SKSD Palapa A slide in 1976 which was used as a 'unifier' of the archipelago. Operation is carried out by PERUMTEL (now PT Telkom).
In addition to long distance commercial telecommunications purposes, it is also used for sending television signals in addition to governmental purposes. The satellite itself is only function as relay stations * receiver and successor of the high frequency signal which is reflected off a layer of the atmosphere. If SKSD Palapa tend to be operated for governmental purposes, the other agencies, namely PT Indosat (Indonesian Satellite Corporation), also operate the satellite, but for commercial purposes even if only with a rental system.

In the 70s, maybe some of us still remember how happy can enjoy a series of boxing great Muhammad Ali. This is thanks to the support Intelsat Indosat hired for the purpose of commercializing the world's television broadcasts. This satellite is also used for the benefit of the international conversation.
Once the opening of any telecommunications network utilization create the world's various telecommunications companies compete to make time for other commercial innovation. Indosat, for example, recently introduced 12 services that can connect to the state-250. Starting from the IDD 001, Conference Call, Precard, Virtual Net, Indonesia Direct, to the free phone. In a service which then calls the Indosat @ your life is, its users also become increasingly easy to contact anyone anywhere in the world. With signals this messenger is the next world will be smaller only

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