随着因特网、高速数据和多媒体业务的发展,许多服务提供商将面临容量危机。解决容量问题有许多方法。直接敷设光纤虽行之有效,但会涉及高昂的成本;在基于Sonet/SDH技术的传统时分网上直接提高速率,从长远看,在技术上会受到限制;密集波分复用由于其独特的技术特性,将会在此方面发挥巨大作用。另外,全光网是未来网络的发展目标,但目前在技术和经济上都还有许多问题要解决。因此,混和网络将长期存在。 With the development of the Internet, high-speed data and multimedia services, many service providers will face a capacity crisis. There are many ways to solve the capacity problem. Directly laying optical fiber is effective, but involves high costs. In the traditional time-division network based on Sonet / SDH technology, the direct rate increase is technically limited in the long run. Dense wavelength division multiplexing, due to its unique technology Features, will play a huge role in this regard. In addition, all-optical network is the future development goal of the network, but at present, there are still many technical and economic problems to be solved. Therefore, the hybrid network will exist for a long time.