Internet在世界各国的不断普及，回引发了数据通信量的激增，同时也造就了一批新兴数据通信设备制造企业。目前，通信体制正面临一场革命，宽带IP将成为未来通信网络的主流，甚至有人预言，未来十年内，电路交换产品将在市场上消失。为迎接挑战，开拓新市场。各传统电信企业也 Internet continues to popularize in all countries in the world, which has led to the surge of data traffic and created a number of emerging data communications equipment manufacturers. At present, the communications system is facing a revolution. Broadband IP will become the mainstream of future communications networks. Some even predict that circuit-switched products will disappear in the market within the next ten years. To meet the challenges, open up new markets. The traditional telecom companies also