To clarify, by “subtle damage”,I mean permanent effects, not DLM feeling poorly for a period, long term reduced sync rates or increased error counts. But nothing visibly blown or simply not working at all.
We had a horrendous couple of months in Dec - Jan, and this spring I've replaced lots of microfilters, DSL cables and modems, gaining sync rate improvements at every step. I started to wonder if a winter near-miss might have mildly cooked things, and I'm wondering if I should replace NTE5s too just in case.