inappropriate. We are attempting to use Juniper single-mode SFPs (LX variety) across multi-mode fiber. Standard listed distance is always for SFPs using the appropriate type of fiber. Does anyone out there know how much distance we are likely to get? Thanks for your help in advance.
Single mode just has a smaller core size for the smaller "beam" emitted by laser vs. LED. it works although I've never done it outside of a lab (MM is cheaper). As for the distance it theory that should come down to the optics and your transmit power. Hopefully this is just a cable connecting the router to a long line. I've never heard of a 10K MM fiber run since SX optics can't shoot that far. You should be able to get through the 500m or so that MM optics are rated for, but YMMV (errors, light levels, bounces, etc etc)