I once tried an LX-SMF-MMF-LX type setup using mode conditioning patch leads between the SMF-MMF and MMF-LX portions of the span. I would be hesitant to recommend it, simply touching the patch lead on the MMF-LX portion would result in horrendous error counts. Suffice to say, we bit the bullet and got some SMF blown through (tubes ftw). I have also used LX-LX on short SMF runs of a couple of metres, for 1G and 10G, with no issues. On 27 January 2012 16:47, Pierre-Yves Maunier <nanog@maunier.org> wrote:
2012/1/27 Steven Tardy <sjt5@its.msstate.edu>
On 01/26/12 16:33, Pierre-Yves Maunier wrote:
It can happends that SX works on singlemode but it can fail anytime.
just because you can doesn't mean you should.
we have experience multiple cases where LX-MMF-LX works great for 3-5+ years... then one day no longer gets link. swapping to a different fiber pair restores link. can't remember SX-MMF-SX failing after years of service.
That's why I wrote 'but it can fail anytime' meaning, I strongly recommand to NOT do it.
-- Pierre-Yves Maunier