Updating 1980s X Terminals? Answered
Okay, so I've been trying to solve this problem for quite a while now, and I've simply run out of ideas.
In my father's optical store, all of the POS computers are X Terminals. They are all connected to a main server in the back. The server is connected to a device which is kinda like an ethernet hub - on its a box with 16 RJ-45 jacks, and a cable coming out of it which connects to the server's parallel port. Each of the jacks are connected to a small adapter cable (filter? crossover cable?) and that cable has an ethernet cable coming from it into a patch bay on the wall. I'm almost completely sure that the cable is *not* carrying a tc/ip signal, because the back of the hub-box-thing explains that each of the wires in the cat-5e cable are assigned to carry specific parallel port signals. So, I'm pretty sure we have a parallel connection running over cat-5e. Also, I'm pretty sure the server is running red hat Linux, which is running an x-11 emulator. Anyway, from the patch bay, all the signals continue through Ethernet cable until they reach the terminal. There, the cable is plugged into an RJ-45 to parallel adapter, which then plugs into one of the two parallel ports on the back of the terminal.
What I'm trying to do is to replace all of those huge, old and ugly X terminals with newer computers and monitors. I've tried connecting the parallel connector on the adapter to various computers and trying a bazillion programs, but I can't seem to emulate an x-terminal. So, any ideas?