Loma Prieta earthquake of 1989...I was working for Kaiser Hospitals in their NOC on the 9th floor of a 21 story building in downtown Oakland when the earthquake hit...watched the Cypress freeway collapse outside the office window (horrible image)...at the time, Kaiser had their own private microwave network linking all their hospitals and medical office buildings in Northern California and we managed the network from the NOC in Oakland. https://kaiserpermanentehistory.org/tag/telecommunications/
Happy to say that none of the microwave systems went down during/after the earthquake. All we lost were T1s coming in from PacBell (AT&T) (two blocks over from their Oakland CO) that were used for external timing. So we had a few clock slips, but the network was 100% operational. Had to make it up to Grizzly Peak at 3am to start the generator as the power went off and that site was on batter power, but the microwave links were not affected. You can't guarantee that an earthquake or hurricane won't take out links, but you can mitigate much of that with implementing good designs with contingencies and maintaining your systems. >>> Lewis Bergman <[email protected]> 2/25/2019 2:20 PM >>> I don't have earthquake knowledge but I do know that when the US bombed the crap or of Iraq a huge amount O of fiber was destroyed by the percussion of the explosions. As a result all US bases that I know of were rebuilt using heavy rigid conduit. Cost the fortunes. I doubt there is any direct correlation and I don't know if extremely rigid conduit would survive a quake better than anything else. I saw a documentary on it years back. On Mon, Feb 25, 2019, 3:25 PM Seth Mattinen <[email protected]> wrote: UNR has an earthquake lab. No idea how much it costs to get time on the equipment though outside of a research project (industry user). Probably not cheap. -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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