RUGGEDCOM RST2228 is a field modular, fully managed Layer 2 Ethernet switch with 4 x 1/10 GBit/s and 24 x 100/1000 MBit/s non-blocking ethernet ports. Support for up to six 4-port media modules with RJ45, SFP or LC interfaces; -40...+85°C operating temperature (fanless); 128-bit encyption. . . 19” Rack / Panel mount kit HI Voltage (88-300 VDC/85-264 VAC) with screw terminal HI Voltage (88-300 VDC/85-264 VAC) None LED Panel mounted on the front (connector side) RUGGEDCOM RMM2973-4RJ45 ( 4 x RJ45, 10/100/1000 BASE-TX) RUGGEDCOM RMM2942-4LC2 (4 x 100MBit/s LC-interface, Optical: 100BASE-FX, Multi Mode fiber optic up to 2 kilometer, 1310nm) RUGGEDCOM RMM2942-4LC2 (4 x 100MBit/s LC-interface, Optical: 100BASE-FX, Multi Mode fiber optic up to 2 kilometer, 1310nm) RUGGEDCOM RMM2942-4LC2 (4 x 100MBit/s LC-interface, Optical: 100BASE-FX, Multi Mode fiber optic up to 2 kilometer, 1310nm) RUGGEDCOM RMM2942-4LC2 (4 x 100MBit/s LC-interface, Optical: 100BASE-FX, Multi Mode fiber optic up to 2 kilometer, 1310nm) RUGGEDCOM RMM2972-4SFP (4 x SFP-slot, Supporting 100BASE-FX, 1000BASE-X SFPs, SFPs are not included)