Networking

The long distances made possible by advances in technologies such as optical amplifiers, dispersion compensators, and new fiber types, resulted in the initial deployment of DWDM technology in the long-haul networks. Once these technologies became commercially viable in the long-haul market, it was the next logical step to deploy them in the metro and, eventually, in the access networks. Besides, as we know, the networks are now being asked to carry heavy data loads, deliver streaming video and provide internet access to a rapidly growing numbers of business and private users, therefore an enormous amount of bandwidth capacity is required to satisfy the service demand by customers. As a result, DWDM metro networks emerged at the right moment. What Is a Metro Network? The overall network infrastructure can be subdivided in three domains: long-haul network, metro network and access network (see picture below). Long-haul networks are at the core of the global network. Dominated by...