APC AP7900 Manuel D’Utilisation

On Windows operating systems, instead of using the preceding procedure 
for exporting .ini files, you can choose to update the basic TCP/IP settings 
of Rack PDUs by using the APC Device IP Configuration Wizard.

See 

 for a detailed 

description of how to discover and configure unconfigured 
Switched Rack PDUs remotely over your TCP/IP network or 
configure or reconfigure a Switched Rack PDU through a direct 
connection from the serial port of your computer to the Switched 
Rack PDU.