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    Entry 11 of 23
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    Apr. 27, 2009 - Telephone
    Telephone: it is the voice signal through two-way transmission equipment. Often people will Alexander Graham BellWholesale Mobile Phone (Alexander Graham Bell is the inventor of the telephone). "Telephone" Japan is made of life, to Chinese translation of English telephone. After the opium war, the western powers in the Chinese territory and wealth, but also for the modern China postal and telecommunication.China Cell Phone Since the invention of telephone, from the principle of work to shape design are exchanged.telephoneCongress on June 15, 2002, 269 resolution to confirm Antonio roberto muzzi (e.g. Meucci) for telephone inventor.wholesale cell phone Roberto muzzi in 1860 first unveiled his invention,China Wholesale and in New York's Italian newspapers published on this invention.History of improvement and invention of telephone include: carbon powder, artificial board, microphone,Wholesale mobile phone automatic exchange dial telephone switchboard, SPC telephone exchanges, a voice dialing, digital sampling,China Electronics etc. In recent years, new technologies, including ISDN, DSL, simulation of mobile phone and digital mobile phones.This industry usually divided into telephone equipment manufacturers and telephone network operators.Wholesale Electronics In history, the network operators are usually has a national monopoly.cell phone accessories In recent years, along with the global telecommunication market integration and opening up and technological development, gradually appear in the same market operators more competitive situation. For example,wholesale cellphone accessories AT&T bell system, namely the subordinate company owned American telephone 80 percent of the market. In 1984, because the United States justice department anti-monopoly lawsuit, bell system forced into multiple independent local bell.cheap cell phone A joke can explain this phenomenon. In AT&A not split, IBM is the second largest company in America. In AT&A divided into seven companies, IBM's ranking become no. 8.2 name origin"Telephone" Japan is made of life,cheap mobile phone to Chinese translation of English telephone. In the original Chinese English words taken transliteration, translation "law". In a period of time,Digital Picture Frame "telephone" and "law" two way. But then, "law" this way finally disappear. Because of this century, a group of early in Japan have jointly to shaoxing students to write a long letter, the hometown of Japan is introduced in detail, the modernization of lu xun also listed. Said in a letter to the "telephone",digital camera especially in electrical notes: ", Chinese words convey to wind ", "law of Germany as the telephone." Therefore, it is called "telephone".3 historytelephone1793, France checked in Paris and Peggy brothers lille has been set up between a 230 kilometers long relay way of cheap digital camera transferring information carrier type line. This is a kind of 16 signal communication system composed of the tower. The signal from the signal by rope and pulley below the different aspects of stents, manipulation, relevant information. At that time, France, Austria, signal and system is only an hour from Austrian wrest ace KongDai victory on news to Paris. Later, Belgium, the Netherlands, Italy, Germany and Russia etc also successively established such communication system. The two brothers look pelosi said is one of the first to use the word ".Europe for long distance wholesale digital camera of voice began to research the seventeenth century. A famous British physicist and chemist Robert hooker first put forward the suggestion teleportation voice. In 1796, hughes is proposed receiver relay voice information,digital camcorder and put the Telephone communication mode, has been called - subsequent games.In 1832, American doctor Jackson in the Atlantic ocean is a ship sailed for passengers on the packet,camera accessories in principle, passenger told electromagnet 41-year-old American painter Morse was deeply attracted. When the signal system only by the French and cited several miles vision, Morse dream with current transmission of electromagnetic signals, instant messaging between the thousands of miles away. Since then, the Morse's life a fundamental change.Morse in wires from the current flow in the wire when suddenly by the fact that sparks inspired:tv mobile phone if a spark current cut-off will send a signal, a current through without a spark of a signal, the current through time lengthen and as a signal that this three kinds of signals,sony camera battery can represent all the letters and Numbers, words can through the current in the wires to the distant. In 1837, Morse finally designed a famous Morse code, it is to use "dot", "stroke" and "gap" the different combination of letters, Numbers,cell phone watch and expressed punctuation and symbols. In 1844 May 24, Capitol in Washington federal Supreme Court conference hall, Morse telegraph, running hand with a series of "dot", "" signal, as the city of Baltimore 64 kilometers received by" di "and" da quad band cellphone"composition of the world's first telegram.4 work principletelephoneTelephone communications is doubled and electricity through mutual conversion, and use the media "electricity" to transmit a communications technology. Two users to communicate, the simplest form, with a pair of two will connect telephone line.A) when the speaker picked up the telephone to talk, the transmitter of vibration excitation vocal sound,tri band cellphones air vibration.B) waves in the transmitter, generate electricity, called voice current.C) voice to each other along the line current of telephone receiver,D) and receiver and transmitter opposite - the current into waves,double sims phone through the air to the ear.So, he completed the most simple conversations process.Through the Internet can call on the phone, the key is common in Internet service provider to establish a set of perfect telephone gateway. So-called telephone gateway, refers to the Internet and the public switched telephone network can be connected together in a computer system, the phone and Internet connection, the other side is the telephone system can score. When a user access and use special network after phone software,camera tripod can pass the microphone and sound speech will be compressed, and digital signal transmission from the destination of the nearest telephone gateway, telephone gateway converts digital signals into public telephone network transmission in the analog signals, and connected to each other,canon camera battery both sides can phone number via the Internet phone calls the gateway to.

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