Xyplex, Raylan ?'s

Hi! Does anyone have any info/manual/docs for a Raylan fiber concentrator w/ SNMP card? I have a nice chassis full of 10bFL cards, including the SNMP card, but I don't have any docs for it. Some of the revisions of fiber cards (as well as some AUI ports) have a jumper labled `RAYLAN MODE' and `IBM MODE', or sometimes `A' and `B'. I'd kind of like to know what it does. Also, the SNMP card has an IP set, which of course doens't fit into my network all that well, I'd like to chage it if I could. I had a few hits googling when I first received it, but that was all just people complaining that the 10b2 ports were unreliable. :( I'm also looking for someone who's had a lot of experience with Xyplex 1600 terminal servers, or even still has one in service. I've got one with the memory expansion, but no flash card to boot it from. I have what is supposed to be the latest firmware, but I can't seem to get it to boot properly. The image is tftp'd, and then the box seems to reboot again-- starts the self test over, and fetches the image again. This too has someone's old config set on it, which might be part of the problem.