The RUGGEDCOM RX1536 is a rugged, modular layer 2 switch + layer 3 router that supports 1 replaceable power supply. Field replaceable line module options in-clude: Up to 36-ports 100FX; Up to 36-ports 10/100TX; Up to 8-ports Gigabit Ether-net; Up to 18 ports 10FL/100SX; ST, LC and M12 connector types on various modules; Up to 6 cellular ports (3G / LTE); Up to 36 RS232/422/485 serial interface ports; Up to 2 APE1808 application hosting modules.