I don't recognize it off-hand. Is there an FCC ID printed anywhere on the board? If so, it may be possible to find information by searching for that.
EDIT: I searched Google for "Appian ADI2", which is what's printed on the large IC next to the "Made in USA" stamp, and came up with this page: http://www.ryston.cz/petr/vlb/adi2.html
It unfortunately does not have any jumper information on it, but it seems to give an alternate model number of "Adaptec AIC-25VL01" that may possibly provide leads. Otherwise, like I said above, searching for the FCC ID might also give some other useful results.