[time-nuts] Frequency over fiber (was WWV and legal issues)
phk at phk.freebsd.dk
Sun Sep 2 14:45:23 EDT 2018
In message <C3C70D17-3E2D-44C6-924C-F780B2245CEB at n1k.org>, Bob kb8tq writes:
> That’s why they design a certain amount of “slack” into the structure.
As far as I know, thermal expansion and contact losses are far
bigger dimensioning factors, except for a few very active fault-lines.
At these fault-lines and/or with very important fibers, special and
site-specific precautions are usually taken.
For terrestial faultlines, the cheapest and easiest mitigation is
to cross the fault-line on poles with a slack messengerwire.
For oceanfloor faultlines, plenty of slack and an oblique crossing
is the best we've come up with yet.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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