@H1000 posted:
Sorry, I misunderstood. The DB-9 is there for updating the firmware. As you can tell, I am big on products coming forward with firmware updates. I don't know if we left hooks in there to communicate via PC but, maybe. It's been too long. OTOH, the receiver (pager sized box) runs critical UL code that prevents combining the outputs. We may have deliberately disabled taking over the box through the DB-9 except for programming.