The RUGGEDCOM RX1500 series is a utility grade layer 2 and layer 3 switch and router. 2x power supply (Hot Swappable) Field replaceable line modules Up to 24-ports 100FX Up to 24-ports 10/100TX Up to 8-ports Gigabit Ethernet Up to 12 ports10FL/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 24 = 24 VDC (15-36 VDC). screw terminal block HI = 88-300 VDC or 85-264 VAC. screw terminal block RM = 19 Rack Mount Kit L3 = Layer 3 Switch XX = Manufacturing modification none L3SEL3HW = Layer 3 Standard Edition (with L3 HW) 6TX01 = 6x 10/100TXRJ45 6TX01 = 6x 10/100TX RJ45 CG01 = 2x 10/100/1000TX RJ45 (1) CG01 = 2x 10/100/1000TX RJ45 (1)