What SFP+ are folks using for 40km 10G SFP+? We recently purchased a pair FiberStore SFP-10GER-55 and I can’t seem to get them to link at 10G. If I set auto-negotiate on or try it off with 10G forced, no link. If I force 1G, I have a link.. However, no problems with the FiberStore SFP-10GER-31 pair linking at 10G on auto.