Cisco SFP and SFP+ Transceiver Modules allow for 10 Gigabit interconnection between BladeCenter chassis switches such as Catalyst 3110X and Nexus 4001I, and upstream top of the rack (TOR) switching devices. The Cisco 10GBASE-SR SFP+ transceiver module supports a link length of 26m on standard Fiber Distributed Data Interface (FDDI)-grade multimode fiber (MMF).