| 摘要 |
<p>The invention discloses a method of implementing long distance very-high-rate digital subscriber line, the invention includes the steps: defining the 0.025MHz~0.138MHz frequency band in the very-high-rate digital subscriber line frequency band as uplink frequency band (US0), and combing the uplink frequency band and other frequency band to get long very-high-rate digital subscriber line frequency band mode, from the several very-high-rate digital subscriber line frequency band mode processing increasing rate training of increase by frequency band, and when the transmission distance is short, establishing high rate connection, when the transmission distance is long, establishing low rate connection.</p> |
