On Dec 31, 2013, at 2:00 PM, eric clark cabe...@gmail.com wrote:
Anyone know why the industry has their head stuck on MultiMode?
at 10G the optics costs are about 1/3 that of SMF (SR vs LR).
We tend to keep things SMF, but within many older datacenters MMF is broadly
available and does meet
My guess would be it's due to existing cable plants. I've worked at a
number of places that have tons of multimode fiber run everywhere. If
you can re-terminate and re-use, even if inefficiently, it often beats
the time and expense required to run new fiber, especially if it's a
place that
Basic economics.
MM optics come with looser tolerances and are therefore easier to
produce. The wider core of the fiber and higher dispersion allowances
also mean that the fiber is easier to make. The fiber, though, is the
small end of this equation. The optics are the big one.
For those who are
Money, really. The optics and fiber cost is cheaper than SM. The
standards around SM optics are to reach relatively long distances, so the
transmitters and receivers are more expensive and they use way more power.
That being said, I see MM in modern datacenters being used in-rack or very
On Tue, 31 Dec 2013, David Hubbard wrote:
My guess would be it's due to existing cable plants. I've worked at a
number of places that have tons of multimode fiber run everywhere. If
you can re-terminate and re-use, even if inefficiently, it often beats
the time and expense required to run new
On Tue, 31 Dec 2013, Justin M. Streiner wrote:
The problem is markedly worse at 100G. DPO-24 is just evil, but the cost
difference between 100G SR10, LR4, and ER4 optics is still ridiculous.
Er... MPO-24. Sorry :)
jms
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