Cisco QSFP-40G-CSR4 | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12 Condition:Used Passive copper direct-attach breakout cable

Passive copper direct-attach breakout cable that links one 40G QSFP+ port to four 10G SFP+ ports

and StackWise-80 stacking technology for simplified management

PCIe Gen5 x16 host interface and extensive hardware offloads (NVMe-oF/TCP

With 12 multi-gigabit RJ45 ports supporting 10GBASE-T and 2x 10G SFP+ uplink ports

EVPN‑ready leaf deployments and seamless integration into modern data center or enterprise networks

Cisco QSFP-40G-CSR4 | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12 Condition:Used Passive copper direct-attach breakout cableParallel optics QSFP+ delivering extended reach 40GbE over MMF. Ideal for leaf spine or aggregation links needing up to 300 m (OM3) or 400 m (OM4). Supports 4x10G breakout on compatible switches.