Cisco CPAK 100GBASE-LR4 10 km Optical Transceiver | Enterprise Optics

Keep 100 GbE links open across longer distances without adding transport complexity. Cisco’s CPAK 100GBASE-LR4 optical transceiver module is built for 10 km single-mode fiber deployments, making it a strong fit for campus backbones, aggregation layers, and data center interconnect paths where reach matters as much as throughput. The LR4 design carries 100 GbE traffic over SMF with the optical budget expected for long-reach enterprise links, while the no-OTN configuration keeps the module focused on Ethernet transport rather than optical transport framing. That matters when you want fewer moving parts, cleaner interoperability planning, and a direct path from switch or router port to fiber plant. For teams standardizing on Cisco ASR 9000-class infrastructure, this module supports the kind of high-value uplinks that justify premium optics: fewer constraints on placement, better alignment with distributed network designs, and the reach needed to connect critical sites without introducing extra aggregation hardware. When the link budget and platform compatibility are non-negotiable, this is the class of optic that belongs in the design.