A simpler option:

If you've got control over the physical wires that run to the orb, control over any patch panels between you and the orb, and an extra ethernet port at your desk, just get those little plugs that you usually get with Cisco routers and such, that will pin-out and RS232 plug into an RJ45 plug. Put one at both ends of the connection, and use an actual serial port on your PC to do the updating.