Jeff, I think you have a couple of issues here: 1. If you are using an HP2392 terminal, the second port (unless you have physically purchased a parallel port for it) is serial only. Only the 700/92-94-96-98 terminals have a parallel printer port. 2. Doesn't the DJ820 need a bi-directional IEEE-12?? parallel cable? I purchased for myself a DJ672 color printer two weeks ago and was required by HP warrantee to purchase this special cable. If this is the case, I don't think the terminal supports the bi-directional protocols. I hope this helps you. Marshall Medoff, ITA, Inc. Arlington, Virginia