Cisco QSFP-40G-CSR4 | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12 Condition:Used and power-to-connector airflow for efficient

and power-to-connector airflow for efficient cooling

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

2 Tb/s aggregate throughput across 64 OSFP 800GbE ports plus 1 SFP28 management port

and StackWise-80 stacking technology for simplified management

Cisco QSFP-40G-CSR4 | 40G QSFP+ | 40GBASE-CSR4 | 850 nm | 300–400 m MMF | MPO-12 Condition:Used and power-to-connector airflow for efficientParallel 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.