Digi International’s SX RF modems are 1 W, 900 MHz modems in rugged metal enclosures for mission critical applications. Interfaces include RS-232, RS-485, USB, Analog I/O and Digital I/O. The XM-X9-3P-U uses RS/232/485 interface whereas the XM-X9-5P-U uses Analog I/O, and Digital I/O interfaces. These modems use DigiMesh^® networking topology for redundancy and reliability, and can operate in single point to multipoint mode. There is a 65 mile line-of-sight range and they are ideal for reliable, redundant wireless cable replacement over range. The SX modems can be configured with the free XCTU software.