Keep legacy Fast Ethernet fiber segments in service with the eNet Components AT-SPFX/2-90-ENC. This compatible SFP is built for Allied Telesis FE ports and supports 100BASE-FX connectivity, making it a straightforward option for networks that still rely on established optical infrastructure. When a full platform refresh is not justified, the right transceiver can preserve uptime and extend the useful life of existing switches. TAA compliance matters in procurement environments where sourcing rules are as important as technical fit. This module is positioned for public-sector and enterprise teams that need a compatible replacement without changing the surrounding network design. It is especially useful where Fast Ethernet remains sufficient for the application and the priority is maintaining service continuity. Choose this module when you need a dependable replacement path for FE fiber ports, not a broader architecture change. It supports the operational reality of mixed-generation networks and helps keep critical links available while controlling refresh costs.