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From: David Lesher <wb8foz@nrk.com>
Message-Id: <200204270042.UAA18804@sigma.nrk.com>
To: nanog@merit.edu (nanog list)
Date: Fri, 26 Apr 2002 20:42:21 -0400 (EDT)
In-Reply-To: <v04210107b8ef83b41372@[216.168.62.240]> from "Chris Kilbourn" at Apr 26, 2002 03:33:42 PM
Reply-To: wb8foz@nrk.com
MIME-Version: 1.0
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Errors-To: owner-nanog-outgoing@merit.edu
Unnamed Administration sources reported that Chris Kilbourn said:
>
>
> In the past few years on NANOG, I've noticed a strong correlation between
> train derailments and network outages. (Not to discount the backhoe
> correlation in any way of course...)
>
> The question I have is this:
>
> If fiber runs are trenched into the railbed, and we know that trains
> go off of the tracks every now and then, what, if anything, is being
> done to harden the conduit?
Conduit? What's THAT ;-? Only exposed (bridge crossing, etc)
parts are in conduit.
> Would trenching it deeper help? Has encasing the conduit in a
> steel-reinforced channel been examined? Or is there something about
> laying conduit next to track and the accident modalities that I am
> just missing here?
A) There's limited right-of-way. Who are you already next to?
ATT? MCI? Sprint?
B) There's limited ACCESS to A). You either must shutdown the
rail line or follow a rigorous safety program to ensure you don't
have a piece of whatever sticking out across the track when that
train goes by.
C) How deep do you want it? ATT put their #5 TCC cable down 4';
no easy task. {But then, we paid for it...}. Will that help
when a locomotive lands on it? If it doesn't... it's much harder
to fix.
D) There's limited money.
--
A host is a host from coast to coast.................wb8foz@nrk.com
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
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