North American Network Operators Group

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Re: Worldcom Fiber Cut

  • From: Leigh Porter
  • Date: Mon Jul 27 04:46:07 1998

Mike Trest (Yokohama Office) wrote:

> Martin,
> SONET redundancy is an option which not all SONET/SDH circuit providers are
> able to deploy.   Even when it is deployed, the alternate strands are
> frequently inside the same fiber bundle (collapsed backbone) which makes
> primary circuit and the backup circuit subject to simultaneous back-hoe
> fade.   Request "DLR" approval on your circuit orders to confirm diverse
> path . . . but do not hold your breath.
> My experience indicates that very few providers have truly diverse routed
> backup fiber between more than a few of their major circuit nodes.  Most
> truly diverse routes involve  "fiber swaps" among fiber owners with
> non-contiguous fiber routes.

Yeah, one of our European circuits purchased from teo completly
differanttelcos went through the same fiber and the same switches from local
to local loop. Whats odd is that they both cost completly differant prices
with the same locak loop providors ;-)