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Communication red scarf
In the past 70 years, to a man, it has been the age of a strong man at his end life, to a home, three generations of inheritance; to a country, forge ahead. From 1949 to 2019, this 70 year history in China is just the corner of the mausoleum. It's the life course of generations of people who pour their youth and blood together to lift up a big oriental country. It's the 70 years when the economic strength and comprehensive national strength have greatly jumped. It's also the 70 years when the way of communication has been constantly changing, catching up with the dazzling golden light.
70 years of striving history of China Telecom
Reminiscence
On October 1, 1949, the people's Republic of China was founded. On November 1, 1949, the Ministry of Posts and telecommunications was officially established as a national institution. On January 3, 1951, the first major communication construction project in New China, the central receiving station of Beijing International Radio, was completed. In the 1950s, we used white paper and words to express our feelings and care for our relatives and friends. A few cent stamp was put into a big green mailbox. Every time a letter was delivered, it was difficult to predict how long it would go and whether it would be lost, whether it would be opened or burnt or sweet for a long time, bearing the most profound memories of the older generation.
See words as if meeting
In August 1958, the first 12 channel carrier telephone in China was successfully trial manufactured. On September 29, 1958, the Beijing telegraph building, China's long-distance communication hub, was completed. In August 1959, the first vertical and horizontal automatic telephone exchange in China was successfully developed. In the 1960s, with the expansion of the telephone network, it was more appropriate for the voice to convey emotion. As long as you can hear the voice of your relatives and friends, either on the phone or on the way, you can still stand in line for hours.
Post office telephone operator
In March 1976, Zhao Zisen pulled out the first quartz optical fiber in China. In the 1970s, with the comprehensive construction of the public telephone network, the public telephone went deep into the streets and alleys, and the small sales department, newspaper kiosks and big loudspeakers said "Comrade XX answered the phone!" It has become the most appropriate and warm information transfer station.
In September 1983, Shanghai opened the first wireless paging system in China, opening the era of personal instant messaging. On November 18, 1987, the first public mobile phone system in mainland China was built and put into commercial use in Guangzhou. In 1984, China began to use single-mode optical fiber on long-distance lines, and the communication line technology has made a qualitative leap, which led to the "home phone" gradually becoming popular in China. In the 1980s, holding a “cellular phone†in hand and kicking a BPM machine in the waist were the best match for the cell phone and the "cellular phone" of countless young people.
cellular phone
On September 1, 1993, China public packet exchange data (CHINAPAC), the first packet exchange network covering the whole country, was opened. On September 19, 1993, China's first digital mobile phone GSM network was opened in Jiaxing City, Zhejiang Province. In the 1990s, the 2G era opened, mobile phones began to enter the homes of ordinary people, the form of telephone line + cat dial-up Internet, began the door for Chinese people to absorb and learn information knowledge from the outside world.
China's first WWW server
In May 2000, TD-SCDMA proposed by China was recognized as one of 3G standards by ITU. In the 21st century, with the increasing demand for network bandwidth, at the same time, China's independently developed communication products such as optical fiber and cable, optical modules, wavelength division multiplexers and other products continue to innovate, so as to realize the expansion of optical fiber communication capacity by dozens of times, and optical into copper push, from then on into the era of optical network.
In 2012, td-lte-advanced became the 4G international standard.
In December 2013, the Ministry of industry and information technology issued TD-LTE licenses to three major operators, and China officially entered the 4G era.
In June 2019, the Ministry of industry and information technology issued 5g licenses to four enterprises.
Prospect chapter
After 70 years of investment and construction, the scale and capacity of China's communication network has doubled, and a public telecommunication network covering the whole country and reaching the world has been built, including optical fiber, satellite, program-controlled switching, mobile communication, etc. By 2019, the capacity of office switches in China will be 131.09 million; the capacity of mobile switches will be increased from 51000 in 1990 to 2.59 billion in 2018, with an average annual growth of 47.3%; the length of optical cable lines will be increased from 557000 km in 1997 to 43.58 million km in 2018, with an average annual growth of 23.1%; the number of Internet broadband access ports will be increased to 890 million in 2018, with an average annual growth of 29.6%.
China Telecom defines new standards
In 2013, the world's first 100g backbone network was born in China. In 2019, China's fiber access rate exceeded 90%. The first main line wavelength division ROADM network was built, marking the evolution of optical transmission network to the era of optical networking and intelligence. More than 40 Beidou satellites have been launched, and GPS will be replaced soon. With the rise of 5g and the interconnection of everything, China's strong layout in recent years has exceeded 50% of the global use of optical fiber and cable. It is estimated that more than 340 cities and first tier cities in China will be covered by 2020, and China will complete the comprehensive coverage of 5g network by 2023.
At this time, did you suddenly find that China is a little different from others? For example, online shopping in remote mountainous areas will be delivered the next day. Looking back, the total mileage of China's expressways has reached 140000 kilometers, ranking first in the world. Looking back, you suddenly find that Hong Kong goes directly to Zhuhai, Shanghai connects to the pan mountains, and you can't find the 18 turns of the mountain road when you enter the Yungui river. Looking back, China's bridges Liang Jianshe is amazing in the world. The longest, tallest and the largest span are all in China. We have already become the world's largest bridge country. Looking back, you suddenly find that in China, you can pay by mobile phone and call by video at any time. Looking back, China's 4G infrastructure coverage is far ahead, with 6 million in the world and 3.5 million in China. Looking back, At this time, are you full of excitement, singing a loud National Anthem in your heart...
