[time-nuts] Frequency over fiber (was WWV and legal issues)
k8yumdoober at gmail.com
Sun Sep 2 16:09:07 EDT 2018
Supposing you buy a bundle of a couple of dozen fibers inside one outer
anyone give me an idea of how well the individual fibers are likely to be
delay, and in delay tempco?
On Sun, Sep 2, 2018 at 1:46 PM Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> In message <C3C70D17-3E2D-44C6-924C-F780B2245CEB at n1k.org>, Bob kb8tq
> > 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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