Uninterruptible Power Supplies; System Shutdown With Ups Battery Rundown; Changing The Ip Address Of Systems With A Ups - NEC Express5800/320Ma Administrator's Manual

Uninterruptible Power Supplies

expect after you install VTMs. You may need to reconfigure the COM port after
installing the VTMs.
See "Virtual Modems"
related information.

Uninterruptible Power Supplies

Your Express5800/320Ma system supports the use of uninterruptible power supplies
(UPSs) to power the system without interruption during short outages, and to gracefully
shut the system down during longer power outages. As part of your fault-tolerant
strategy, obtain and use a UPS qualified by NEC Solutions (America), Inc.
•
For information about qualified UPS models, see the site planning guide for your
system.
•
For UPS installation details, see the Express5800/320Ma: Software Installation
and Configuration Guide.

System Shutdown with UPS Battery Rundown

When you use a UPS qualified by NEC Solutions (America), Inc., you connect that UPS
to one half of the system. If a failure occurs in the UPS or in the UPS power source (for
example, if the UPS is unplugged) and the backup battery runs low, the system initiates
a shutdown, even if the power to the non-UPS half of the system is unaffected by the
failure.
If you have independent sources of AC power available for your system, you can
minimize the possibility of this kind of shutdown by connecting the UPS to the more
reliable power source. However, failure of the more reliable power source can shut
down the system even if the less reliable source is still operational.

Changing the IP Address of Systems with a UPS

If you change the IP address on the system, update the configuration on the UPS with
the new IP address. If you do not update the UPS, and power to the system is
automatically removed after a power failure, the system does not restart when power
is restored.
2-12 Express5800/320Ma: System Administrator's Guide
and "Using VTMs to Troubleshoot Systems" on page 3-5
N O T E
Assign a static IP address to the network interface that
provides the connection to the UPS.
for