Cisco Qsfp 1 X Lc Duplex 40Gbase-Sr Network for Data Networking Optical Network\n\nCisco QSFP - 1 x LC Duplex 40GBase-SR Network - For Data Networking, Optical Network - Optical Fiber - Multi-mode - 40 Gigabit Ethernet - 40GBase-SR, 40GBase-CSR - Hot-swappable\nCisco QSFP-40G-CSR-S (S-Class)\nThe QSFP-40G-CSR-S is a pluggable optical transceiver with a duplex LC connector interface used for connectivity using MultiMode Fiber (MMF). The Cisco 40GBASE-CSR Modules support link lengths of 300 meters and 400 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. Customers benefit through the reuse of their existing 10 gigabit duplex MMF infrastructure as they migrate to 40 Gigabit Ethernet, while maintaining the same supported link distances as 10G Ethernet. Each QSFP-40G-CSR-S operates at four different wavelengths. Each of the four wavelengths operates at 10G over existing duplex multimode fiber using standard LC connectors. The Cisco QSFP-40G-CSR-S transceiver supports ;