said by Doctor Olds: The faster you go the more stress and demand is placed in the entire line and even more so on the inside wiring.Regards,
Doctor Olds
It's actually the other way around the loop places a load (loss, distortion, multi-path echos etc.) upon the ADSL signal as the signal is incapable of doing anything to the copper that carries it. The demand if there was one would be placed on the DSP and the algorithm running the DSP in the ADSL(2)(+) receiver in the DSLAM/modem to sort usable bits out of the received signal.
BTW stress on a copper loop is a factor of DC flowing thru the loop and causing noise at less than perfect splices which will only affect xDSL in an off hook condition.
FWIW ADSL2(+) simply places additional bins above the ADSL cutoff of bin number 254 this extends the upper limit of the signal almost an additional meg to just over 2mHz.
In order to prevent additional NEXT as a result of the higher transport frequencies the downstream output power is reduced in a ratio to the increase of frequency.
This lowering of power actually pulls in not extends the SCA that ADSL2 (+) will work at. As such once one gets into loops over 8-10 Kf non-bonded ADSL2 can have a lower thru-put than standard ADSL.
Wayne