Used Lantronix UDS1100 DEVICE SERVER

LANTRONIX UDS1100 Universal Device Server Ethernet to Serial RS232/422/485

Lantronix EDS2100 2 Port Serial Server

Lantronix UDS1100 - One Port Serial (RS232/ RS422/ RS485) to IP Ethernet Device

Lantronix UDS100-01 UDS Device Server Serial To Ethernet Connector - NICE!

Lantronix UD1100002-01 Device Server. Factory sealed.

Lantronix xDirect Compact Secure Serial IP Ethernet DeviceServer XDT2321002-01-S