The RUGGEDCOM RX1501 series is a utility grade layer 2 and layer 3 switch and router. 1x power supply Field replaceable line modules Up to 36-ports 100FX; Up to 36-ports 10/100TX; Up to 4-ports Gigabit Ethernet Up to 18 ports 10FL/100SX SC, ST, LC and MTRJ Pluggable Optics (SFP) Up to 4 T1/E1 ports cellular (EVDO / HSPA), DDS (56K Master/Slave, 64K Slave) Up to 24 RS232/422/485