Preserve critical fiber connections with a compact PCIe network adapter designed for servers that still depend on ST-based multi-mode infrastructure. The AddOn ADD-PCIE-ST-FX delivers 100 Mb/s Ethernet over a single ST port and supports multi-mode fiber runs up to 2 km, making it a focused fit for environments where compatibility matters more than raw throughput. Built on an Intel 82574 chipset and installed through a PCI Express 2.0 x1 host interface, this plug-in card is suited to systems that need a dependable, standards-based fiber interface without moving to a larger or more expensive platform. It is a straightforward option for extending the life of existing fiber cabling, connecting legacy equipment, or maintaining service continuity in server rooms where ST terminations remain in use. For teams managing mixed-generation infrastructure, this adapter offers a clean path to keep older links operational while avoiding unnecessary rip-and-replace projects. Lifetime warranty coverage adds long-term confidence for deployments where the card may remain in service for years.