[102204] in North American Network Operators' Group
RE: Another cablecut - sri lanka to suez Re: Sicily to Egypt undersea cable disruption
daemon@ATHENA.MIT.EDU (Rod Beck)
Fri Feb 1 12:58:09 2008
Date: Fri, 1 Feb 2008 17:47:39 -0000
From: "Rod Beck" <Rod.Beck@hiberniaatlantic.com>
To: "Martin Hannigan" <hannigan@gmail.com>,
"Steven M. Bellovin" <smb@cs.columbia.edu>
Cc: <nanog@merit.edu>
Errors-To: owner-nanog@merit.edu
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-----Original Message-----
From: owner-nanog@merit.edu on behalf of Martin Hannigan
Sent: Fri 2/1/2008 5:01 PM
To: Steven M. Bellovin
Cc: nanog@merit.edu
Subject: Re: Another cablecut - sri lanka to suez Re: Sicily to Egypt =
undersea cable disruption
=20
On Feb 1, 2008 11:43 AM, Steven M. Bellovin <smb@cs.columbia.edu> wrote:
> There's an interesting article at
> =
http://www.nytimes.com/aponline/technology/AP-Internet-Outages-Cables.htm=
l
> on cable chokepoints.
>
"NEW YORK (AP) -- The lines that tie the globe together by carrying
phone calls and Internet traffic are just two-thirds of an inch thick
where they lie on the ocean floor."
This article is somewhat "misleading". Semantics, but it set the tone
of the article for me and probably most of the public.
The cables are able to have their physical characteristics changed by
the ability to splice joints into the cable and connect two physically
disparate ends to serve specific purposes related bottom geologies,
depth, and other dangers. Different cable types are deployed to
mitigate different risks such as fishing, quakes, slides, etc. The
lightweight cable may be thinner, but is used in less risky settings
like massive depths. When you get to something like heavy weight
armored on the edge of a fishing ground or winding through a
treacherous bottom geology, your're talking much larger diameters and
much more weight, as Rod Beck had mentioned previously.
There are many variables that go into route selection and cabling
which impact type. Cost is one.
-M<
Weight is a bigger issue than most people realize. In order to lift a =
cable out of the water and onto the deck of a Global Marine or Tyco =
Submarine ship, it has be cut and the two segments lifted out of the =
water, spliced, and then a 'joint' is placed at the splice point. The =
weight of even a thin cable is too great to be lifted without being cut =
in two.=20
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<P><FONT SIZE=3D2>-----Original Message-----<BR>
From: owner-nanog@merit.edu on behalf of Martin Hannigan<BR>
Sent: Fri 2/1/2008 5:01 PM<BR>
To: Steven M. Bellovin<BR>
Cc: nanog@merit.edu<BR>
Subject: Re: Another cablecut - sri lanka to suez Re: Sicily to Egypt =
undersea cable disruption<BR>
<BR>
<BR>
On Feb 1, 2008 11:43 AM, Steven M. Bellovin <smb@cs.columbia.edu> =
wrote:<BR>
> There's an interesting article at<BR>
> <A =
HREF=3D"http://www.nytimes.com/aponline/technology/AP-Internet-Outages-Ca=
bles.html">http://www.nytimes.com/aponline/technology/AP-Internet-Outages=
-Cables.html</A><BR>
> on cable chokepoints.<BR>
><BR>
<BR>
<BR>
"NEW YORK (AP) -- The lines that tie the globe together by =
carrying<BR>
phone calls and Internet traffic are just two-thirds of an inch =
thick<BR>
where they lie on the ocean floor."<BR>
<BR>
This article is somewhat "misleading". Semantics, but it set =
the tone<BR>
of the article for me and probably most of the public.<BR>
<BR>
The cables are able to have their physical characteristics changed =
by<BR>
the ability to splice joints into the cable and connect two =
physically<BR>
disparate ends to serve specific purposes related bottom geologies,<BR>
depth, and other dangers. Different cable types are deployed to<BR>
mitigate different risks such as fishing, quakes, slides, etc. The<BR>
lightweight cable may be thinner, but is used in less risky settings<BR>
like massive depths. When you get to something like heavy weight<BR>
armored on the edge of a fishing ground or winding through a<BR>
treacherous bottom geology, your're talking much larger diameters =
and<BR>
much more weight, as Rod Beck had mentioned previously.<BR>
<BR>
There are many variables that go into route selection and cabling<BR>
which impact type. Cost is one.<BR>
<BR>
-M<<BR>
<BR>
Weight is a bigger issue than most people realize. In order to lift a =
cable out of the water and onto the deck of a Global Marine or Tyco =
Submarine ship, it has be cut and the two segments lifted out of the =
water, spliced, and then a 'joint' is placed at the splice point. The =
weight of even a thin cable is too great to be lifted without being cut =
in two.<BR>
<BR>
</FONT>
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