Millet phone data cable data cable recycling recycling _ _ Jinan electronic Obo

Telegraph transmission is symbolic, sending a telegram data cable recycling company, was first translated into code where packet data line recycling, reuse telegraph sent. In the closed side, to go through the reverse process, the upcoming received code translated into packets and then sent to the person close at hand. This is not only troublesome, but also can not be a two-way exchange of information in a timely manner. Therefore, people began to explore a direct way of transmitting the human voice phone, which is now known to everybody 'phone'. Europe for long-distance transmission of voice studies began in the 18th century, in 1796, Hughes made the transmission of voice information using the microphone relay approach. Although this method is not practical, but he gave a name one way this phone 131 100 'phone), still in use. In 1861, a German teacher invented the most primitive telephones, using acoustic principle can talk to each other at a short distance, but you can not put people really use our telephone successor, in 1881, British electrician leather Xiao Pu in Shanghai Shiliupu erected along the street one pair of open-air telephone, pay 36 paper money system can call again, this is China's first telephone. February 1882, the Danish Great Northern Telegraph Company in Shanghai Bund Yang Yu-day road run from our first telephone office, the user 25. 1889 data cable recycling, Anqing candidate states to know the state name John Paul, a self-designed phone, including the size of the parts made five or six ten kinds of recycling Sony phone lines, becoming China's first self-designed and manufactured the phone. In 1900, China's first local calls come in Nanjing. China Post Station old phone system and non-governmental organizations to be advanced gradually replace postal and telecommunications. ROC period, China's Posts phone is still in control of the Western powers. Plus years of violence, mobile facilities often destroyed. Anti-Japanese War, the Japanese imperialists for war needs and attempt to dominate China's long-term aim, renovation and expansion of the telecommunications network system, and they use that time China's economic, technological backwardness and political corruption, technology, equipment, maintenance and management in China's mobile phone division control.