Who invented adsl?

Asymmetric Digital Subscriber Line (ADSL) technology was developed in the 1980s by a group of engineers at Bell Communications Research, which was a research and development organization for the Bell System. Notably, Dr. John Cioffi is often credited with significant contributions to the development of ADSL, particularly in the area of modulation techniques. The technology was commercially deployed in the late 1990s, enabling high-speed internet access over traditional telephone lines.