[c-nsp] multimode Re: GLC-SX-MM and 50µm mm fiber

Robert Blayzor rblayzor at inoc.net
Mon Nov 13 15:11:45 EST 2006

Mikael Abrahamsson wrote:
> Hi. Sorry for hijacking your thread, but I was just wondering if someone
> could explain to me why one would ever want to deploy multimode cabling
> in new installations? To be forward-looking, I'd say single mode is the
> way to go. Then you know for a fact you can scale into at least 100G,
> most likely quite a lot more.

One word, cost.  MMF optics are quite a bit cheaper than SMF.  SMF SFP's
are generally twice as expensive as MMF.  So if you're doing quite a bit
of new installation, it doesn't take long to do the math.

Robert Blayzor, BOFH
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Supercomputer:  Turns CPU-bound problem into I/O-bound problem.  - Ken

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