Q. What is the 40GbE max supported distances? A. The IEEE 40GBASE-X standard describes the following: 40GBASE-SR4 supports up to 100m on OM3, and 150m on OM4. There is no support for OM2 or OM1 (these are considered legacy). 40GBASE-LR4 supports up to 10km on 9um SM fiber (same fiber used for 10G single mode […]