Keep critical fiber links stable with an SFP designed for 1,000 Mbps Ethernet over single-mode fiber. This AddOn Networks transceiver is compatible with Cisco GLC-LH-SMD deployments and supports 1000BASE-LX operation at 1,310 nm, giving network teams a straightforward way to extend Gigabit connectivity across longer distances than multimode optics typically allow. TAA compliance makes it suitable for procurement environments with sourcing requirements, while the Cisco-compatible design helps simplify replacement planning across installed switch fleets. For teams maintaining access and distribution layers, the value is in predictable interoperability, not guesswork. It is a clean fit for uplinks between closets, building-to-building runs, and other single-mode fiber paths where link stability matters more than saving a few dollars on a lower-grade optic. Choose this module when the network needs a reliable replacement or expansion optic that matches the operational expectations of enterprise infrastructure. It delivers the core optical profile required for Gigabit single-mode deployments without adding unnecessary complexity.