NE-4100T SeriesCompact Size Series is a small sized drop-in module for integrating high-speed Ethernet and TCP/IP communication functions into the circuit board of legacy and new serial devices. NE-4110 SeriesQuick Integration Series is designed for manufacturers who want to add a high speed Ethernet and TCP/IP communication function into legacy serial devices, but without changing the PCB design NE-4120 SeriesIndustrial Ethernet Series provides Ethernet via pin header, giving you the ability to upgrade your device to an industrial, Ethernet-ready product.