[TriLUG] The next Arpanet? 10 Billion bits per second? "Woah"
Aaron S. Joyner
aaron at joyner.ws
Wed Mar 3 21:25:59 EST 2004
crimsun at fungus.sh.nu wrote:
>On Wed, Mar 03, 2004 at 04:42:39PM -0500, Joshua Gitlin wrote:
>>Just saw this in the News and Observer. [
>>Thought it might interest some people here. I'd love to learn more
>>about it. I can't tell if it's IP based, or what. Sounds cool though!
>Take a look at http://www.nationallambdarail.org/architecture.html
If you read the fine print at this link, you may come to the realization
that I have: It's not 10Gb, it's 400Gb. They're using DWDM (Dense
Wavelength Division Multiplexing) - which from my fiber experience (many
years ago) sounds like the big brother to multi-mode fiber. With the
obvious differences being it works over distances previously only
possible via single-mode fiber (i.e. only one beam of light down one
tube of glass), and it's a heckuva' lot more transmission paths (beams
of light down one tube of glass).
The relevant quote, for those who consider hyper links in email to be a
dangerous vector for viruses because they read their email as root... :)
> NLR is lighting the first fiber pair with an optical Dense Wavelength
> Division Multiplexing (DWDM) network capable of transmitting up to 40
> simultaneous light wavelengths (‘lambdas’ or ‘waves’). Each of these
> wavelengths is capable of transmitting 10 gigabits per second.
A good primer on the various types of fiber, single vs multimode, etc
can be found at the link below. It also touches on DWDM at the very end.
Note: Link is from 1998, but the information is still quite valid.
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