Data transfer through the optical medium has its romantic dimensions but is primarily for practical uses. WDM technology can greatly increase the bandwidth of optical fibers and allows, for example, to back up data centres, share client applications and share optical fiber between multiple users. WDM systems also supports classical TDM / SDH technology and it is possible to expand the data throughput while maintaining the traditional TDM / SDH applications. We represent a leading suppliers of WDM, so we can deliver solutions from simple point-to-point configuration to complex DWDM networks. In short, we have many years of experience with installation and support of WDM network.