The section on AppSocket Devices (11.5.1) seems
to be close to what I was babbling about:

http://www.linuxdoc.org/HOWTO/Printing-HOWTO/network.html#NETWORKED-PRINTERS

I don't know if it applies...

>>> Troy.A.Johnson at state.mn.us 07/26/01 04:48PM >>>
I vaguely remember reading that jetdirect cards
expect communication on port 9000 (or 9001, or
something like that) and that you had to designate
that in the config file:

   :rm=skinner at 9000:\

or something close (since ":" is already used as a
separator).