line monitor? Interview 3600

I found what looks like to be a line monitor. It has two RS-232C DB25 connectors on the back, labeled connector 1 and connector 2, there is also a barrel type connector labeled video out. The front panel which is hinged at the bottom and is the keyboard, folds down and reveals a small monitor. The keys appear membrane contact type. There are buttons labeled send and receive. There is a QWERTY keyboard and number pad and additional buttons. The label is Atlantic Richfield and immediately below it is Interview 3600. It appears to be the size and form factor of a Compaq luggable. There are no card slots or other openings on the back besides the power connector, 2 DB25 connections and external video. Has anybody seen one of these? I suppose if could be some kind of disk or interface exerciser. Google turns up nothing. Thanks Mike mmcfadden(a)cmh.edu