... Port of DB9 Serial speed 75bps to 230Kbps Hardware RTS/CTS, software Xon/Xoff Signals: RS232: RS232: Rx, Tx, RTS ... , CTS, DTR, DSR, DCD, GND RS422: Rx+, Rx-, Tx+, Tx- RS485: ... Data+, Data- Modem controls: DTR/DSR, DCD and RTS/CTS Network Protocols TCP, IP, UDP, Telnet, DHCP, ICMP, HTTPEnbeddedNucleus ManagementSerial ...