Batboard

Can someone please ID this model number for me? I have seen similar-looking boxes, at first glance appears to be an RIB, about the same size, three mounting feet molded into the plastic casing, but it's more likely some sort of MDC / signalling box for a /\/\ mobile? Has only one connector, 25-pin. I want to give this thing a home...

Thanks guys and gals . . .