Build longer fiber runs without changing the switch architecture. The AddOn Networks AT-SPLX40-AO is a 1-Gigabit SFP transceiver designed for 1000BASE-LH links over single-mode fiber, giving network teams a dependable option for uplinks and inter-building connections. Its LC connector and SFP form factor make it straightforward to deploy in compatible Allied Telesis environments and other supported platforms. The long-reach design is well suited for campus backbones, distribution-to-core links, and remote network segments where copper is no longer practical. TAA compliance adds procurement clarity for public sector and regulated buyers. Compared with generic optics, this module is aimed at compatibility, link stability, and lifecycle consistency — the qualities that matter when a transceiver is expected to sit in production for years, not weeks.