The RUGGEDCOM RMC40 is a 4-port unmanaged Ethernet switch that provides both copper-to-fiber media conversion as well as 10Mbps to 100Mbps speed conversion. configurations: 2 ports 10/100TX + 1 port 100FX (SC/ST) or 2 ports 10/100TX + 2 ports 100FX (MTRJ/LC) or 4 ports 10/100TX