1000BASE-T to Dual SFP Fiber Media Converter with Redundant Mode The TRENDnet TFC-G21SFP is a compact Gigabit media converter designed to convert copper connections to fiber-optic connections. With one Gigabit RJ45 port, two Gigabit SFP slots, and a redundant SFP uplink, it is ideal for reliably establishing fail-safe fiber-optic connections in enterprise and industrial networks. The converter supports multimode and single-mode SFP modules and can be easily integrated into existing networks thanks to plug-and-play functionality.