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4
SYSTEM POWER UP
This chapter contains:
■ “Power Options” for the SuperStack
®
II Switch
3900 system
■ “Power Up” instructions the Switch 3900 system
■ A description of “Power-up Diagnostics”
■ A list of “System Checks” after power up
For information on troubleshooting the system during
power up, see Chapter 6.
Power Options
You have three options for how to power up your
Switch 3900 system.
Place the system near a power receptacle. You can
power down the system only by removing the power
cord from the power source.
AC Power Cord
You can connect the system directly to a wall
receptacle with the AC power cord that is shipped
with the system. See “Power Up” for details.
Optional Advanced Redundant Power System
To protect against internal power supply failures, you
can connect a 3Com Advanced Redundant Power
System Type 2 (RPS) to the Switch 3900 system. The
RPS connector is located on the rear panel.
CAUTION: Connect only a 3Com Advanced
Redundant Power System Type 2 to this connector,
using the external Type 2 Y cable that is shipped with
the RPS.
For details, follow the installation instructions and
safety precautions that are shipped with the
redundant power system.
Optional Uninterruptible Power System
To protect against external power interruption from
brownouts, blackouts, surges, and spikes, connect an
uninterruptible power system (UPS) to the Switch
3900 system. Connect only a 3Com Uninterruptible
Power System. Use the appropriate UPS for your
region:
■ United States
■ European/International
■ Japan
To install the UPS, follow the instructions and safety
precautions that are shipped with the UPS.