Mini Unmanaged 1x 10/100/1000Base-T RJ45 to 1x 1000Base-X SFP Slot Gigabit Ethernet to Fiber Media Converter, AC 100V~240V or DC 5~12V optional
1x 100M/1G/2.5G/5G/10GBase-T RJ45 to 1x 10GBase-X SFP+ Ethernet Media Converter
Amazon.com: UCEC 1x Type A USB2.0 Female to Ethernet RJ45 Male Plug Adapter Connector : Electronics
Buy Basetech ISDN Cable extension [1x RJ45 8p4c plug - 1x RJ45 8p8c socket] 6.00 m Black | Conrad Electronic
Industrial 1x 100M/1G/2.5G/5G/10GBase-T RJ45 to 1x 10GBase-X SFP+ Slot 10Gigabit Ethernet Media Converter - FS.com Europe
Network RJ45 Splitter Cat5e Adapter 1x RJ45 Socket to 2x RJ45 Sockets Shielded Version Connector (2 ports work in the same time)
Amazon.com: SFP Copper RJ45 Transceiver Gigabit Module 10/100/1000Base-T with Gigabit Ethernet Single Mode Dual SC Fiber, Mini 1x 10/100/1000Base-T RJ45 to 1x 1000Base-LX SFP Slot Ethernet Media Converter : Electronics
Amazon.com: 10G Ethernet Media Converter, 1x 100M/1G/2.5G/5G/10GBase-T RJ45 to 1x 10GBase-X SFP+ Slot,10Gigabit Fiber Ethernet to Copper UTP Converter, AC 100V~240V or DC 5~12V Optional : Electronics