Cisco CPAK 100GBASE-LR4 Optical Transceiver | 10 km, Enterprise — CON-OSP-RSP5TR5R

Move 100G traffic farther without changing the architecture around it. Cisco’s CPAK optical transceiver module for 100GBASE-LR4 is designed for long-reach single-mode deployments up to 10 km, making it a strong fit for campus backbones, metro aggregation, and data center interconnects that need dependable optical reach. LR4 optics are chosen when short-reach multimode links are no longer enough and the network needs to span buildings or extended facilities with controlled signal performance. The CPAK form factor supports high-density optical design choices in Cisco environments, while the no-OTN configuration keeps the module focused on native Ethernet transport. For infrastructure teams, this is the kind of module that earns its place in the bill of materials by reducing the need for intermediate gear and preserving a clean optical path. It is a practical option when the cost of a failed link, an extra hop, or a constrained reach window is higher than the premium for long-reach optics. Ideal For Connect campus buildings with 100G single-mode fiber links Build data center interconnect paths that require up to 10 km reach Aggregate traffic across backbone segments without intermediate transport gear Standardize Cisco optical modules in long-reach enterprise networks Why This Product 1 Supports 100G Ethernet over single-mode fiber 2 Reaches up to 10 km for long-distance links 3 Uses CPAK form factor for Cisco environments 4 No OTN design keeps the module focused on native Ethernet