The CSX product family provides high speed transmission on copper lines, based on DSL technique. It provides affordable, flexible and efficient service provisioning for SME and SOHO customers as well as campus applications. Several different user interfaces can be ordered to provide solution from Internet access (Ethernet / EFM) to legacy services as machine-to-machine applications (V.24). The DSL side of the CSX-family is using standard telephone lines (UTP) for transmission and several lines can be bundled to achieve data-rates of up to 20Mbps across several kilometers. A powerful repeater (BRX1) is available to extend the operating distances massively.