> Before cables modems everything was symmetric. Late 1990s V.90 modems were asymmetric, higher download speeds caused upload speed to deteriorate, and often u

> Before cables modems everything was symmetric. Late 1990s V.90 modems were asymmetric, higher download speeds caused upload speed to deteriorate, and often up traffic would be shunted into a more limited analog channel to keep it from interfering with the down speed. https://en.wikipedia.org/wiki/Modem#Standardized_56k_(V.90/V.92) https://en.wikipedia.org/wiki/Modem#Standardized_56k_(V.90/V... I remember something in the earlier 14400/28800/USRobotics era being asymmetrical too, but can't find a reference. Where I've lived, ADSL also predates cable modem, and the A there is for Asymmetric.