No I do not have meaningful measurementsl, only the experiences of replacing Cat 5 with CW1308 at four locations and the overall improvement of the broadband, These were houses more than a mile from the exchange meaning the ADSL signal was already "weak".The ADSL signal is designed to make the best use of low twist telephone cable CW1308, If you use CAT 5 or 6 cable to take the ADSL signal to the router / modem then the much higher twist will reduce the quality of the ADSL signals to and from the router / modem.forget about the old extension wiring and get some cat5/6 and run that in
Do you happen to have meaningful measurements to back up this oft-repeated theory?
The theory comes from people I know who were involved in the early designs of broadband equipment and the transmission of ADSL signals along the existing telephone cables.