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Hunting for North Korean Fiber Optic Cables

(nkinternet.com)
288 points Bezod | 1 comments | 08 Dec 25 16:38 UTC | HN request time: 0s | source
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mikkupikku ◴[08 Dec 25 19:06 UTC] No.46196286[source]▶
Do those small utility boxes alongside the tracks make sense for fiber optic? I expected things like that to be larger, if only because fiber has a minimum bend radius.

Edit: Good article though, I enjoyed it a lot.

replies(3): >>46197862 #>>46197947 #>>46205494 #
adamcharnock ◴[08 Dec 25 21:26 UTC] No.46197862[source]▶
The min bend radius isn’t that large in my experience. On the order of 10cm IIRC, possibly even less.
replies(2): >>46197929 #>>46198131 #
Lukas_Skywalker ◴[08 Dec 25 21:49 UTC] No.46198131[source]▶
Even less is correct: outdoor fibers (G.652.D) have a minimum bend radius of about 30mm. The indoor counterpart (G.657.A1 and A2) have 10mm and 7.5mm.
replies(2): >>46201661 #>>46204093 #
1. eqvinox ◴[09 Dec 25 12:15 UTC] No.46204093{3}[source]▶
The larger cables tend to have strength members with higher physical bend radius restrictions, i.e. you can't bend the steel or kevlar elements that tightly without breaking things.