Centillium's Maximus ADSL2 Chipset Claims 50 Mbps

Centillium Communications unveiled its “Maximus” 12-channel, central office (CO) chipset compliant with the ITU-T G.992.1 (G.dmt), G.992.2 (G.lite), G.992.3 (G.adsl2) and G.992.5 (G.adsl2plus) standards. The company claims its eXtremeDSLMAX technology is able to deliver up to 50 Mbps of downstream bandwidth for short loops, or reach customers at distances up to 22,000 feet from the central office, while maintaining full backward compatibility with over 30 million deployed ADSL modems. ADSL2plus standard offers downstream data rates of up 24 Mbps over short-to-medium length loops. Centillium’s Maximus delivers up to 50 Mbps by leveraging a “quad stream” feature that uses frequency spectrum from 138 Khz to 3.75 MHz. The Maximus chipset supports upstream rates of up to 3 Mbps using frequency spectrum from 25 Khz to 276 Khz.
http://www.centillium.com