Per Hansen of Ciena at
NANOG 50talked about
growing capacity not by adding more
data cables under the sea, rather by increasing spectral density.
Eventually new cables will be needed, but meanwhile he thinks
we can get up from about 2 bits to to 5 or 6 bits per Hertz.
It does require more power: same energy per bit, but more bits.
Plus mesh networks for rerouting, even if it means rerouting
backwards around the world, he notes.
We’ve observed that sort of emergency backwards routing
as long ago as January 2008, in the
U.A.E. Cable Cut.
David G. Ross ofThe David Ross Group Inc. at
data cables under the sea, in which he revealed that Internet growth
has not only not paused during the recession, it has increased,
and it continues to increase in every region in which his company operates,
including Asia, Middle East, and Africa.
North Atlantic hasn’t had any new submarine capacity in years,
in “the most competitive capacity market on Earth”.
It will probably run out in a few years, so now there is demand
to build new cables there.
Each cable costs about $200 million to install.
Slight downside: early remark that he was sure things were the same
as they were when he worked for a telephone company.