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2-24 Extreme Networks Consolidated Hardware Guide
Site Preparation
UPS Features
A UPS traditionally can perform the following functions:
Absorb relatively small power surges.
Smooth out noisy power sources.
Continue to provide power to equipment during line sags.
Provide power for some time after a blackout has occurred.
In addition, some UPS or UPS plus software combinations provide the following
functions:
Automatic shutdown of equipment during long power outages.
Monitoring and logging of power supply status.
Display the voltage (current draw) of the equipment.
Restart equipment after a long power outage.
Display the voltage currently on the line.
Provide alarms on certain error conditions.
Provide short circuit protection.
Selecting a UPS
To determine UPS requirements for your switch, ask these questions:
What are the amperage requirements?
What is the longest potential time period that the UPS would be required to supply
backup power?
Where will the UPS be installed?
What is the maximum transition time that your installation will allow?
Extreme Networks recommends that you use a UPS that provides online
protection.
Calculating Amperage Requirements
To determine the size of UPS that you need, use the following procedure:
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