(With the rapid development of telecom's Internet business, the predictable user demand will grow exponentially in a few years. At the same time, as the timetable for joining the WTO is approaching, the competition pressure from all aspects is increasing. However, the current Internet infrastructure of Shenzhen Telecom is not developed enough to quickly occupy the commanding heights of the field and remain invincible in the future competition. Therefore, Shenzhen Telecommunications Bureau decided to build an advanced, flexible, reliable and standards-based urban backbone communication platform, so that Shenzhen Telecom could quickly launch a series of Brand-new broadband multimedia services, thereby attracting more users, increasing the competitiveness of the field, realizing the commercial value of the network, and laying a solid foundation for the rapid introduction of new services to meet the new business needs of the field in the future.)