Not one to blow his own horn, Cioffi shies away from publicity. But, by all accounts, the Stanford professor was intent on coming up with a way to deploy broadband over copper wires and developed asymmetrical digital subscriber line (DSL) technology. He left Stanford in 1991 to found Amati Communications Inc. He has since returned to Stanford, where his research focuses on Dynamic Spectrum Management (DSM).
[[xref:http://www.brightcove.tv/title.jsp?title=412821138&channel=372305193|Video interview with Cioffi on the occasion of his winning the 2006 Marconi Prize|Brightcove.TV Is Off The Air]]