SR Cisco SFP+ refers to 10GbE short-range optical transceivers designed for multimode fiber networks. These modules follow the 10GBASE-SR optical standard and are optimized for short-distance high-speed connectivity within data centers. Links beyond a selected multimode optic's supported reach may. The Cisco ® 10GBASE SFP+ modules (Figure 1) give you a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications. Multimode SFP+ transceivers are compact, hot-pluggable optical modules designed to deliver 10Gbps data transmission over multimode fiber. SR stands for Short Range, these transceivers support link length of 300m over multi-mode fiber and use 850nm lasers. 10GBase-SR it uses a single, low-cost solid-state laser assembly, it is also.