摘要
China has built 22 optical cable trunks, 20 digital microwave trunks and 20 medium-to-large satellite earth stations during the eighth Five-year Plan, thus creating a favorable condition for the development of China’s data telecommunications and value-added business. China’s public data telecommunications, networks have become the main stream for the country’s information transmission through several years of rapid development. China’s public packet switching data network (China Pac), its network capacity increasing to over 60,000 terminals, now covers more than 600 cities, and is interconnected with 44 packet networks of 23 countries and regions. China’s
