The network is built with connecting media, including optical fiber cables, twisted pairs, coaxial cables, and now wireless networks, which can also be carried out through satellites. The network connection between China and the United States should mainly be through submarine cables and submarine optical fibers. The following introduction
Submarine cable The first submarine cable in the Pacific was laid by the United Kingdom in 1902. In 1905, the United States also laid a submarine cable in the Pacific. At present, there are submarine cables between Canada and Australia, the United States and the Philippines, Japan and Indonesia, Hong Kong and the Philippines and Vietnam, and the coastal countries of South America. In recent years, artificial communication satellites have been used to communicate over the Pacific Ocean.
The world's first trans-Atlantic submarine optical cable was put into use at the end of 1988. This undersea dragon connects the United States, Britain and France, with a total length of about 6,400 kilometers, and has 7,650 communication lines, which can open 40,000 telephone lines at the same time. In 1993, a large-scale cross-continental project to connect Asia, Europe and Africa with an optical fiber communication network was implemented. It can connect 12 countries and regions on three continents to each other. This optical cable named "Global Optical Fiber Communication Line" starts from the British Isles and extends to Midway Island in the Pacific Ocean, connecting Spain, Italy, Egypt, United Arab Emirates, India, Thailand, Malaysia, China and South Korea along the way. This optical fiber communication line is currently the largest optical fiber communication system in the world. It can transmit telephone exchanges, TV programs, computer data and other information from Asia to Africa and Europe in real time; at the same time, it can transmit information from Europe and Africa back in time. Asia. In order to meet the needs of Internet voice, image services and future information highways, a transoceanic and transcontinental undersea optical fiber communication line connecting 175 countries around the world called the "Oxygen Project" is being laid. This most ambitious communication project in the 20th century spans the Atlantic Ocean, the Mediterranean Sea, the Red Sea and the Indian Ocean, enters the Pacific Ocean through the Strait of Malacca, and finally connects to North America across the Pacific Ocean. The total length is nearly 320,000 kilometers, equivalent to encircling the Earth's equator. Turned 8 times. This optical communications giant is expected to take off in the early 21st century.