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 buying two or three optics a year, a $150 price difference is no big deal. For those who buy two or three hundred optics every other month, this really makes a difference and those are the ones driving the MM development. -Wayne On Tue, Dec 31, 2013 at 02:08:36PM -0500, Jared Mauch wrote:
On Dec 31, 2013, at 2:00 PM, eric clark <cabenth@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 the needs at a lower cost.
There seems to be a shifting trend as well in UPC vs APC connectors.
I think much of this problem is clearly articulated here: http://xkcd.com/927/
Everyones needs are a bit different.
- Jared
--- Wayne Bouchard web@typo.org Network Dude http://www.typo.org/~web/