Keep fiber-connected systems online with the Allied Telesis AT-2911SX/ST-901, a PCIe x1 adapter designed for dependable Gigabit networking in demanding infrastructure environments. Its 1000SX interface supports 1,000 Mbps-class connectivity over fiber, making it a practical fit for servers, workstations, and embedded systems that need a compact expansion card without sacrificing link stability. The PCI Express 2.0 host interface helps ensure straightforward installation in compatible systems, while the plug-in card form factor keeps the footprint small for dense chassis layouts. ST connectivity is well suited to legacy fiber environments where existing cabling and infrastructure must be preserved. For teams maintaining mixed-generation networks, this adapter offers a clean path to extend or replace fiber links without redesigning the entire stack. As part of Allied Telesis’ 2911 Series, this model is aimed at environments where predictable performance and hardware compatibility matter more than commodity pricing. It is a focused choice for organizations that value long service life, controlled deployment risk, and a known vendor footprint in the network edge.