purchasing the correct power cords for use with specic Extreme Networks equipment.
The web page provides specications for power cords in each country so that you can
purchase cords locally.
AC power cords must meet the requirements listed in Power Cord Requirements for
AC-Powered Switches and AC Power Supplies on page 110.
UPS (Uninterruptible Power Supply) Requirements
A UPS (uninterruptible power supply) is a device that sits between a power supply
(such as a wall outlet) and a device (such as a switch) to prevent outages, sags, surges,
and bad harmonics from adversely affecting the performance of the device.
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 a period of time after a blackout has occurred.
In addition, some UPS devices or UPS-plus-software combinations provide the
following functions:
• Automatically shut down equipment during long power outages.
• Monitor and log 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.
Select a UPS
To determine UPS requirements for your switch, answer 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 the installation will allow? (See Provide a
Suitable UPS Transition Time on page 54.)
Note
Use a UPS that provides online protection.
Site Preparation UPS (Uninterruptible Power Supply) Requirements
ExtremeSwitching 5420 Series Hardware Installation Guide 53
To Next Page
Loading...
