[101062] in North American Network Operators' Group
Re: IEEE 40GE & 100GE
daemon@ATHENA.MIT.EDU (Robert E. Seastrom)
Wed Dec 12 08:07:03 2007
To: "Justin M. Streiner" <streiner@cluebyfour.org>
Cc: nanog@merit.edu, chris.cole@FINISAR.COM
From: "Robert E. Seastrom" <rs@seastrom.com>
Date: Wed, 12 Dec 2007 08:05:38 -0500
In-Reply-To: <Pine.LNX.4.64.0712120742420.11282@whammy.cluebyfour.org> (Justin M. Streiner's message of "Wed, 12 Dec 2007 07:50:48 -0500 (EST)")
Errors-To: owner-nanog@merit.edu
"Justin M. Streiner" <streiner@cluebyfour.org> writes:
> I haven't read the draft spec yet to see what's being proposed for a
> link budget at 3/4/10km, but that's just as important as the physical
> distance.
That's a really good point, and one which I didn't originally consider
pre-coffee. :-)
Link budget information on page 4, here:
http://www.ieee802.org/3/hssg/public/reach/Matsumoto_r1_1207.pdf
Relative cost estimates on page 5.
Suppositions for ingredients to link budget are here:
http://grouper.ieee.org/groups/802/3/hssg/public/nov07/cole_01_1107.pdf
(page 3)
I'm kind of looking longingly at that extra 3dB, given the slight
marginal extra cost and my knowledge of the trained chimp quality
mechanical splices that are rife in certain <cough> data centers.
---Rob
