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 48 = 48 VDC (36-59 VDC) XX = No power supply 2 D = DIN rail mounting xx = none XX = Manufacturing modification none L200 = 1x 100FX - singlemode 1310nm. LC connector. Standard 20km. and 1x no port