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A comment on 75-year-old woman with shovel accidentally took down Armenia's internet (2011). Parent comment

Re:75-year-old woman with shovel accidentally took down Arme... by LuxuriousCheese on Friday April 24, 2020 @03:20AM (#22965492)
ISPs or dark fiber providers have detailed maps aligning with road networks. If there’s a suspected fiber cut they’ll run an OTDR from the ODF box or the source photonic equipment which will show high reflection/ signal degradation where the break occurred to the nearest 100m dependant on test granularity.
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Re:75-year-old woman with shovel accidentally took down Arme... by swarnie_ on Friday April 24, 2020 @04:53AM (#22965975)
> ISPs or dark fiber providers have detailed maps aligning with road networks.

Most of the time. I worked a summer for Virgin (UK) basically digging holes to run cables.

I'd say 1 in every 6-7 jobs we dug the hole and found no existing Virgin inf. in the ground. You'd have to come back the next day hopefully with better information to try again.

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