Wow...that fired some old brain cells. I saved one of these around 86-87 and had it hooked to a VAX/BSD4 system for a while. All I really remember about it was that it was pretty well made but after wasting too much time mucking about I could never finesse a termcap entry for it that didn't have some more or less annoying corner-case breakage. I suspected that even though it had a serial port and "VT compatibility", IBM didn't much want to encourage anyone hooking one up to a non-IBM system.
KJ