Does openreach have such a system? It would be a surprise to me as I always assumed that openreach only cared about faults when someone actually reported them. If a line has never had some form of DSL on it and never had a fault reported I'd assume BT didn't know how long it was.
Also on the line length - is that based purely on resistance and knowledge (assumed?) of cable thickness or can the test actually time the returned pulses and be 100% sure of length?
Edited by Andrue (Mon 16-Oct-17 12:10:36)