One of the under reported but significant stories of the broadband era is the success of the telephone industry’s digital subscriber line (DSL) program. DSL aims to enable telcos to keep pace with cable modems and other delivery methods using innovative techniques to push their legacy copper infrastructure ever further. It is working.
It is not unlike the Institute of Electrical and Electronics Engineers’ (IEEE) similarly successful 802.11 Wi-Fi program. Different types of DSL subgroups are aimed at...