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Cisco 40GBASE Multimode Fiber QSFP - QSFP-40G-SR4 voip phones PWR-C1-715WAC - 715W AC PowerCisco QSFP 40G SR4 Module with Warranty The Cisco 40GBASE SR4 QSFP Modules support link lengths of 100 meters and 150 meters, respectively, on laser optimized OM3, and OM4 OM5 multimode fibers. It primarily enables high bandwidth 40G optical links over 12 fiber parallel fiber terminated with MPO MTP multifiber female connectors. It can also be used in a 4x10G breakout mode for interoperability with 10GBASE SR and SFP 10 25G CSR S (in 10G mode)