You wrote....
AFAIK no ISP uses vintage hardware. So you're
going to be connecting to
some modern machine.
Well, I'm an ISP. Let's see if I can figure out how to get an IP stack on an
HP2100, SLIP... attach it to a modem bank via multiple baci boards... hack
up an ethernet board... and voila! Instant vintage dialup server :)
Actually, I have thought about moving a machine or two into the datacenter,
but then it'd be too far to play with, and run my already huge power bills
through the ceiling!
Jay