High-speed, high-capacity, long-haul terrestrial networking

Next generation DWDM transport equipment must be designed to take advantage of the cost savings associated with both ultra-long haul transmission and high spectral efficiency. In addition, to support bandwidth-on-demand, and other differentiated services, high-speed data channels that can be shared efficiently and provisioned flexibly will be required. High spectral efficiency systems composed of a few high rate data channels will be preferred because they can support legacy bandwidth demands with less equipment and fewer systems that are easier to manage and spare. In addition, higher channel rate systems can scale to meet the dynamic bandwidth demands of a data oriented backbone. Experimental results support the claims that long-haul 40 Gbit/s DWDM transport systems can be deployed today, on existing network infrastructure.