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Fast EtherHub 3500 System User’s Guide
2-12 Installing the System
Powering on the Hub
1. Plug one end of the power cord into a power outlet, and the
other end into the power socket at the rear of the hub (in that
order for reasons of safety). Then plug in the backup power
module if you purchased this option. For reliable backup,
connect the backup power module to a separate AC circuit.
2. Check the LED indicator marked PWR1 (or PWR2) on the
front panel to see if it is on. The unit will automatically
select the setting that matches the connected input voltage.
Therefore, no additional adjustments are necessary when
connecting it to any input voltage within the range marked
on the rear panel.
3. The hub performs a self-diagnostic test upon power-on.
(Note that this test takes about 15 seconds to complete.) For
details about the system self-diagnostic test, refer to the
following section.
I
The unit supports a "hot remove" feature which permits you to
connect/disconnect network cables without powering off the hub and
without disrupting the operation of the hubs in stack. However, when
changing SmartExtender Modules or power supply modules, first
disconnect power to the concerned hub.
Diagnostic Tests
Upon power on, the system performs an internal self-diagnostic
test of major hub components. If any component fails during
the test, the hub will try to complete the diagnostic procedure.
Otherwise, the system will hang. For related information, refer
to
Diagnostics Test Indicators in Chapter 5.