That is awesome. Around 2016 I was converting from an older “get charged a premium for Maintenance” AS400 mid-range computer to a State of the Art iSeries (the successor to the AS400). The new iSeries does not support the old TwinAx standard that we were still using for 2 terminals and 2 expensive line printers. The terminals were easy to dump but the printers were a big expense and instead I found a little BlackBox that did the IP to Twinax for the printers. Problem is one didn’t work.
I ended up on tech support and it came down to for the one printer, I had to change the DIP switches to “Reverse the Polarity”. I felt like Scotty I did. It was awesome for this old Trekkie.