I know what that's from!
In the '90's Compaq sponsored a LOT of sporting events, and provided 'high tech' solutions for doing things at these events. That board is from a scorekeeping machine that transmitted the scores in realtime via multiple modems to different media outlets. They had like 20 of the buggers set up for that... There was an article about it in PC world (I think) at the time.
Actually, no... I think the article was in Computer Shopper.
-- edit -- that's right, they also had "multimedia info center" kiosks set up. It could also be from those. Would make more sense for a 486 class machine.