A DSL optimizer (610) coupled in communication with a Digital Subscriber Line (DSL) system, wherein the DSL optimizer comprises: collecting means (620) to collect operational data from the DSL system; analyzing means (640) to perform analysis regarding further operation of the DSL system based on the collected operational data; wherein the DSL optimizer is configured to identify cross-talk between lines (130) in the DSL system based on the analysis; and a signal generator (650) configured to generate and send instruction signals to modems and/or other components of the DSL system, wherein the signal generator is configured to send instructions to place the lines into groups based on the cross-talk identified between the lines.