Cisco CPAK-100G-LR4 100G Transceiver 10 km SMF | Enterprise Optics

When the network has to span real distance, Cisco CPAK-100G-LR4 optics provide 100G connectivity over single-mode fiber with a 10 km reach. That makes this module a practical choice for campus backbones, inter-building links, and aggregation paths where short-reach optics fall short. The CPAK form factor is designed for Cisco platforms that need dense optical connectivity in a package suited to production infrastructure. LR4 optics are a strong fit for structured fiber environments where the optical path is already in place and the priority is stable transport, not compromise. For teams planning long-reach upgrades, this module helps keep the design clean and the link budget predictable. This is a premium optic for networks that cannot afford guesswork. It belongs in deployments where 100G throughput, single-mode fiber, and long-reach reliability must align. If you are standardizing Cisco optics across a backbone or replacing lower-reach modules with something built for distance, this transceiver is the right class of component.