Cisco QSFP-40G-CSR4 | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12 Condition:Used and StackWise-80 stacking technology for

and StackWise-80 stacking technology for simplified management

plug-in module supports any combination of standard SFP/SFP+ transceivers

and power-to-connector airflow for efficient cooling

40GbE QSFP+ active optical cable with integrated transceivers for short to medium in-rack/inter-rack links up to 7 meters

Cloud-managed Layer 2 access switch with 24x 10/100/1000BASE-T ports delivering PoE/PoE+ power (370W budget) and 4x 10GbE SFP+ uplinks for high-speed aggregation

Cisco QSFP-40G-CSR4 | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12 Condition:Used and StackWise-80 stacking technology forParallel 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.