On Mon, May 12, 2014 at 10:26 AM, Reimer, Mark <[email protected]> wrote: > Currently have 62.5/125 fiber between buildings. If my understand/research > is correct, my practical limit is 1 Gbs (distance of up to 200 meters).
There's more to fiber than diameter. From our most recent job spec: "multimode, 50/125 diameter (µm core/cladding), graded-index, low metal content, compliant with ITU-T G.651 and ISO/IEC 793-2 type A1a,with a minimum bandwidth of 2000 MHz*km ". I don't know what most of that means, I'm just parroting the specs from HP's transceivers. But that's supposed to get us 10 gigabit speed at up to around 500 meters distance, IIRC. (Currently we're just using it at 1 gigabit.) From looking at HP's spec charts, it seems like bandwidth is the most important factor (makes sense). The higher that number, the longer/faster you can go. > New trenching/conduits is scheduled to happen, and is a great opportunity to > put in new fiber. I’d like to put in fiber that is faster (at least capable > of 10 Gbs), and that I don’t have to touch/replace for a few years at least, > hopefully more. A good strategy, and one I heartily endorse, but I'd say even more important is to make sure the conduit ends are easily accessible, marked on floor/property plans, and pull strings are left in. That way when the inevitable upgrade happens, the hard part (digging) is already done. > What is recommended these days? Standard answer: What are your requirements? :-) -- Ben
