Apc Smart Ups 1000 Serial Connection
Apply the port settings to establish the connection. Press 3-5 times to display the username prompt. Use the default username and password of 'apc' You are now in the control console. Choose 'Network' Choose 'TCP/IP' Choose 'Boot mode' Change Boot mode to 'Manual' Set the system IP, subnet mask, and default gateway. Accept changes.
Is this the NIC card you have installed in your UPS?
If so, have you tried using the 'Network Management Device IP Configuration Wizard' to configure it? If you don't have that application, you can download it from here:
Apc Serial Connection Software
Connect your UPS to the same network as the computer you are using to configure it. You can install the configuration wizard and follow the step-by-step instructions that you can find on that same page. I haven't done it in a while but from what I remeber it is very straight forward with that software.