IBM BNT RackSwitch G8124R, Installation Manual

Page: 22 / 70

8
„
BNT RackSwitch G8124 Installation Guide
Reset Button
The Reset button is recessed within a hole on the front panel. Use a straightened paper clip or
similar object to press the Reset button. The Reset button allows technicians to reset the switch, as
follows:
„
Press Reset : The switch resets and reloads the configuration files.
„
Press and hold Reset for five seconds: The switch resets and configures all settings
to factory defaults.
Fans
Six internal fans cool the switch unit. If an individual fan fails, the other fans continue to run, and
the switch unit continues to operate normally. Fans are not customer replaceable.
Fan operation and internal temperatures are monitored. If the air temperature exceeds a desired
threshold, the environmental monitor displays warning messages.
Note –
If a fan fails, the maximum operating temperature drops from
+40ºC
to
+35ºC
.
The Fan LED blinks if there is a failure of one or more fans.
AC Power Supply
The G8124 has two redundant 275W AC power supplies. Each internal power supply has an
individual IEC 320 power connector on the rear panel. The power cord attaches to a universal
grounded AC power source.
Each power supply can be connected to a separate AC circuit to mitigate the risk of down time
during a power failure. When used in a redundant configuration, the dual power supplies have a
load-sharing capability that allows each supply to operate at approximately 50 percent of full load.
Using redundant power can minimize the power disruption during a power supply failure and
extend the expected lifetime of each supply by operating normally in a conservative power mode.
There is no power switch on the G8124; the switch unit powers up when power is supplied through
the power cord(s).