1998. I built these G.lite DMT ADSL modems at Virata and they easily achieved 2 Mbps over an 18 kilofeet reel of cable. I did not have any interferers to hand! The StrongARM is a nice fast processor provided the application is CPU bound.
The square box above the roof of my house is a prototype ATM radio local loop system designed in Cambridge by Steve Greaves, John Porter and their team. All of the active electronics was housed in the single box with a multicore dropcable to an ATM-25 LAN socket-point in my roofspace. This was then plugged into my home Warren ATM network.
The customer station units connected to antennas at the top of the tower at Addenbrookes Hospital and on the roof of the University Engineering Department.