When you prepare to connect some SFPs with fiber patch cords, you may find SFPs are multimode modules while your fiber cables are single-mode. Try to connect those optics to fiber cable, but no green light and the link fails. So multimode …

Multimode Fiber Cable Overview Multimode fiber optic cables are described using a system of classification determined by the ISO 11801 standard-OM1, OM2, and OM3-which is based on the modal bandwidth of the multimode optical fiber. OM4, de…