Sorry - they do not ask everyone.
Normally it is not needed, but just every so often DLM seems to "get stuck" and not fully complete the line regrade. Quite often the upstream performance improves immediately whilst the downstream remains at 40/10 levels. The power cycling usually corrects this.
Probably the difference between how things work in theory and how they work in practise.
Edited by iefbr14 (Wed 22-May-19 10:25:18)