Cisco QSFP-40G-CSR4 Optical Transceiver Module

The Cisco QSFP-40G-CSR4 QSFP+ transceiver provides 40 Gigabit Ethernet over multimode fiber for high-speed interconnects between switches, routers, and servers, with reach up to 300 m on OM3 and 400 m on OM4 fiber. This QSFP+ fiber transceiver uses an MPO/MTP connector and supports 40GBASE-CSR4 at 850 nm on multimode fiber, compatible with Cisco switches and routers that have QSFP+ ports. Designed for data centers, cloud infrastructures, and high-performance network aggregation, it enables short- to medium-distance optical uplinks and inter-switch connectivity in spine-leaf architectures and high-density server environments. Key specifications: Manufacturer Part Number QSFP-40G-CSR4; Product Type QSFP+ Transceiver Module; Data Rate 40 Gbps; Standard 40GBASE-CSR4; Wavelength 850 nm; Fiber Type Multimode Fiber (MMF); Maximum Distance Up to 300 m on OM3 / 400 m on OM4; Connector MPO/MTP; Manufacturer Cisco Systems.