As telephone operators are increasing the capacity of their existing copper infrastructure for new high-speed telecommunica-tion services, network optimization and maintenance of high service quality to existing customers become major issues.New modulation techniques have made it possible to turn the copper network into a high-speed transmission medium. However, as more and more transmission systems are being deployed, network operators need reliable installation tools to achieve more efficient and effective deployment. Since crosstalk is the limiting factor against DSL transmission performance, managing crosstalk means managing the network. This is what the Linescout® is designed for.