Undersea fiber cut after Taiwan earthquake - PCCW / Singtel / KT e tc connectivity disrupted

Rod Beck Rod.Beck at hiberniaatlantic.com
Sun Jan 21 22:52:10 UTC 2007

Well, I work for an undersea cable system and we are quite to willing to share the information under NDA that is required to make an intelligent decision. That means the street-level fiber maps and details of the undersea routes. 

However, there is a general reluctance because so many carriers are using the same conduits. A lot of fiber trunks can put in a conduit system so it was the norm for carriers to joint builds. 

For example, in the NYC metropolitan area virtually all carriers use the same conduit to move their traffic through the streets of New York. 

And again, I will remove the disclaimer. 



-----Original Message-----
From: owner-nanog at merit.edu on behalf of Aaron Glenn
Sent: Sun 1/21/2007 8:40 PM
To: nanog at merit.edu
Subject: Re: Undersea fiber cut after Taiwan earthquake - PCCW / Singtel / KT e tc connectivity disrupted

On 1/20/07, Brian Wallingford <brian at meganet.net> wrote:
> That's news?
> The same still happens with much land-based sonet, where "diverse paths"
> still share the same entrance to a given facility.  Unless each end can
> negotiate cost sharing for diverse paths, or unless the owner of the fiber
> can cost justify the same, chances are you're not going to see the ideal.
> Money will always speak louder than idealism.
> Undersea paths complicate this even further.

Just the other night I was trolling marketing materials for various
lit services from a number of providers and I ran across what I found
to be an interesting PDF from the ol' SBC (can't find it at the
moment). It was a government services  product briefing and in it it
detailed six levels of path diversity. These six levels ranged from
"additional fiber on the same cable" to "redundant, diverse paths to
redundant facility entrances into redundant wire centers". What struck
me as interesting is that the government gets clearly definied levels
of diversity for their services, but I've never run across anything
similar in the commercial/enterprise/wholesale market.

Are the Sprints/Verizons/ATTs/FLAGs/etc of the world clearly defining
levels of diversity for their services to people?

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