Yes, exactly. We have quotes for some 40GBASE-LR modules (1310nm) that will go up to 10km over a single physical pair of SMF. They do use WDM and have 4 wavelengths, though I'm not sure if that's considered Dense or Coarse WDM; that's really just semantics, right?
Given our specific situation, and the fact that we have about 30 pair of dedicated SMF between the two rooms in question, we're actually looking at a much cheaper, though non-standard solution for our room-to-room 40GbE, that does use 4 distinct pairs. Lloyd Brown Systems Administrator Fulton Supercomputing Lab Brigham Young University http://marylou.byu.edu On 03/18/2013 10:13 AM, Steve Alligood wrote: > Actually, the general spec for these use 4 and 10 distinct fibers. > Basically, 10GBASE across multiple strands to get 40 and 100 GBASE. To go > long distances, you have to put all 4 or 10 channels across a DWDM on 4 or 10 > colors. > > There *is* a 40GBASE spec that uses a single pair of fiber, but it is limited > to 2 km. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
