Why is it so hard to find this kind of information? Hopefully, this will save someone else the hassle of finding it. If you’ve got this lovely printer with a network interface, and you want to print to it directly from a Windows box, read on.
Installing Printer Driver for Optra S 1855 networked:
You must install the full network package (netwn32e.exe) that sets up the network drivers. You will end up with a local printer port, and need to create a Lexmark printer port (Call it Optra) and then set the IP address of the printer and use that port. In some cases you can find the address with the search option as well.