USRobotics NETServer/8 - Manual (Page 253)

The Boot Process D-1
Appendix D
The Boot Process
When you flip the power switch to the ON position. The row of
LEDs on each set of 8 modems will cycle through several colors
as the modems perform self-diagnostics. When they are fin-
ished, the Run/Fail LED(s) should be green, indicating that the
modems are ready.
The NETServer hardware (bottom row of LEDs) will also come
to life. Like any other computing device, the NETServer needs
to load its basic system files (boot) every time it is turned on.
Normally, the NETServer loads these files from its internal flash
memory. However, you may use a PC to update the boot files in
flash memory.
The first thing the NETServer does is wait for a PC connected to
its serial port to send a new version of the boot files. This is
done by running PCSDL (PC Software DownLoad) on the PC.
See Appendix C for instructions on how to use this program.
If the NETServer does not find a PC running PCSDL within 5
seconds, it will go directly to the boot files in flash memory.
During the POST (power on self test), the Flash RAM LED and
the bottom Run/Fail LED turn red. When the POST tests are
complete, the bottom Run/Fail LED then flashes green slowly
while the NETServer checks for a software download from the
serial port (5 seconds) . The LED then flashes more rapidly as
the NETServer loads its application software into RAM and
finally turns solid green when the process is complete.
Note that this process takes about a minute.