USRobotics NETServer/8 - Manual (Page 244)

C-6 Software Download
From the Windows Management Software
In addition to being able to SDL new operating firmware to the
NETServer, version 3.2 of the NETServer Manager software
allows you to upgrade the internal modems.
Upgrading NETServer Firmware
1. Select Software Download \
NETServer from the File
Menu.
2. The Download NAC file to NETServer dialog box appears.
Select the *.NAC file you want to perform the software
download with. For NETServer/8 and NETServer/16, the
filename is pn??????.nac, where ?????? is a six digit version
number for the firmware.
Click on the OK button when finished.