There must have been some additional noise / errors to trigger it at some point. DLM runs on your line & it monitors your line individually, so it's not 'broken' it's just doing its job - sadly most of us don't like it.
Crosstalk can cause a line on fibre to lose 10+ Mbps suddenly. Of course you cannot remove the crosstalk, only correct for it via interleaving usually or reduce everybody's output power but that's not going to happen.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
adslmax (knowledge is power)
Tue 27-Aug-13 04:10:31