Comment ADSL2 or ADSL+ or PLUS (Score 2, Interesting) 153
I work for a telco. We run ADSL and ADSL+. Our customers negotiate and run full speed (all the pair can handle). To control the bandwidth they use, we shape their traffic as they enter and leave the network.
As for the speeds of the two technologies . . . ADSL (G.DMT) will link at 6Kft or less and give anywhere from 60-80% of link speed. I am currently running on a 900kbps/7600kbps link and get 800kbps/6000kpbs of real throughput. ADSL+ will link at 900kbps/9000kbps or greater and will get 800kbps/8000kbps or greater. But, all these conditions are subject to proper pair qualification and distance limitations.
Pretty much anything below 6kft will be wonderful. From 6-12kft there will be a 10-20% decrease in speed. From 12-15kft there will be a 20-30% decrease in speed. From 15kft on out we would switch the customer to G.Lite (1000kbps/4000kbps) which will run out to 24kft at some proportion of the rated speed. At 24kft a costomer will likely get 256kbps/512kbps . . . which is nothing to sneeze at. We have a neighboring telco which has a G.Lite customer at 27kft of 19 ga. copper running better than 256kbps/512kbps (although I have not heard any results of throughput tests on that link).
Remember, not all telcos are created equal.
As for the speeds of the two technologies . . . ADSL (G.DMT) will link at 6Kft or less and give anywhere from 60-80% of link speed. I am currently running on a 900kbps/7600kbps link and get 800kbps/6000kpbs of real throughput. ADSL+ will link at 900kbps/9000kbps or greater and will get 800kbps/8000kbps or greater. But, all these conditions are subject to proper pair qualification and distance limitations.
Pretty much anything below 6kft will be wonderful. From 6-12kft there will be a 10-20% decrease in speed. From 12-15kft there will be a 20-30% decrease in speed. From 15kft on out we would switch the customer to G.Lite (1000kbps/4000kbps) which will run out to 24kft at some proportion of the rated speed. At 24kft a costomer will likely get 256kbps/512kbps . . . which is nothing to sneeze at. We have a neighboring telco which has a G.Lite customer at 27kft of 19 ga. copper running better than 256kbps/512kbps (although I have not heard any results of throughput tests on that link).
Remember, not all telcos are created equal.
