... operation mode, TCP/UDP multicasting, telnet COM port control protocol support (RFC2217 compliant), and port event handlingKey features Nucleus ... Flexible TCP/UDP host mode support : Multiple host connection/data transfer Easy to use and isntall System logging & port logging ... , DSR, DCD, GND RS422: Rx+, Rx-, Tx+, Tx- RS485: Data+, Data- Modem controls: DTR/DSR, DCD and RTS/CTS Network Protocols ...