RADSL - Rate Adaptive Digital Subscriber Line. A version of ADSL where modems test the line at start-up and adapt their operating speed to the capacity of the line.
Router - This is your connection between networks for DSL service. It keeps packets flowing from everywhere, directing traffic according to programmed routing tables.
SDSL - Single Line DSL. Requires just one twisted line compared to other forms of DSL that might need two or three. It is also symmetric, which means that the maximum upstream and downstream speeds are the same.
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