NTT Develops Logical-topology Reconfigurable WDM

NTT has developed a logical-topology reconfigurable WDM system that would enable network managers to quickly change the topology of a network, such as during traffic spikes following a disaster, traffic changes due to corporate restructurings, or simply to load-balance Internet traffic. The technology, which was developed by NTT Photonics Laboratories, uses an Arrayed-Waveguide Grating (AWG) router. Multiple logical topologies, including mesh, star and ring, can be established on one AWG-STAR network by selecting a suitable wavelength.
http://www.ntt.co.jp/news/news03e/0309/030917.html