The connector is a DB-37, used mostly for RS-499, but this does not look
like that kind of device. The other common use for this connector is in
Analog/Digital control devices. I agree with the comment that it looks like
I don't think you can deduce anything from the choice of connector. I've
used a DC37 (note, AFAIK the DB37 does not exist, although the DB44 does)
conenctor for all sorts of things, not related to RS449 or ADCs. IBM used
it for the external floppy drive connector on the PC, for example.
AFter all, not all DB25s are RS232 ports :-)
-tony