Move 100 GbE traffic across single-mode fiber where a long-reach QSFP28 optical interface is required. AddOn Networks 3AL82074AA-AO implements the 100GBASE-LR4 optical Ethernet standard for compatible Alcatel-Lucent and Nokia network equipment. Its QSFP28 form factor fits platforms with QSFP28 transceiver slots, allowing a 100 Gigabit uplink, aggregation link, or data-center interconnect to occupy one modular port. LR4 optics transport 100 GbE over duplex single-mode fiber and support link distances up to 10 km. This makes the module appropriate for connections between separated network rooms, buildings, aggregation layers, or data-center rows where multimode-fiber reach is insufficient. The duplex LC optical interface uses the existing two-fiber path associated with LR4 deployments rather than requiring a parallel-fiber MPO/MTP connection. The TAA-compliant construction addresses environments with Trade Agreements Act sourcing requirements. Select this optic when the host platform requires compatibility with the 3AL82074AA interface and the link design calls for 100GBASE-LR4 operation over single-mode fiber. Confirm that the destination equipment has an available QSFP28 port and that both ends of the link use matching 100GBASE-LR4 optical interfaces.