Yep, it's a NIC alright. The trick will be hacking into it to get the IP set up. Unfortunately, to get into it requires:
Whine whine whine, moan moan moan.
- A serial connection
- A specially pinned out cable
- A machine close enough to the UPS to be connected by that cable
- Non-production machine, at that
Whine whine whine, moan moan moan.