翻开历史的长卷，人们不难发现通信与人类相伴已倏忽几千年，无论是古时候的烽火狼烟、驿站，还是近现代的电磁技术、计算机、卫星、光纤等，都是人们传递信息的手段和工具。如今，通信技术融入了更为宏大的信息产业，电信技术和计算机技术趋向融合，信息产业正从一个先导产业 It is not difficult for people to find that the communication and humanity have been neglected for thousands of years. No matter in ancient times flames, inn, or modern electromagnetic technology, computers, satellites, optical fiber and so on are people’s information transmission Means and tools. Nowadays, the communication technology has been integrated into a more ambitious information industry. The telecom technology and the computer technology tend to converge. The information industry is moving from a leading industry