Extreme Networks VSP 4900 Series Hardware Installation Manual page 32

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Place the equipment in an area that accommodates the power consumption and component heat
dissipation specifications.
•
Be sure that your power supply meets the site DC power or AC power requirements of the network
equipment.
•
When you connect power to installed equipment, do not make this connection through an extension
cord or power strip.
•
If your switch includes more than one power supply, connect each power supply to a different,
independent power source.
If a power source fails, it will affect only the switch power supply to which it is connected. If all switch
power supplies are connected to a single power source, the entire switch is vulnerable to a power
source failure.
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In regions that are susceptible to electrical storms, we recommend that you plug your system into a
surge suppressor.
For detailed power specifications for your equipment, see "Technical Specifications."
Requirements for Power Cords
Most ExtremeSwitching switches do not ship with power cords. Visit
product/powercords/
specific Extreme Networks equipment. The web page provides specifications for power cords in each
country so that you can purchase cords locally.
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:
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Absorb relatively small power surges.
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Smooth out noisy power sources.
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Continue to provide power to equipment during line sags.
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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:
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Automatically shut down equipment during long power outages.
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Monitor and log power supply status.
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Display the voltage (current draw) of the equipment.
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Restart equipment after a long power outage.
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Display the voltage currently on the line.
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Provide alarms on certain error conditions.
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Provide short-circuit protection.
VSP 4900 Series Switches: Hardware Installation Guide
for information on selecting and purchasing the correct power cords for use with
Preparing to Install
www.extremenetworks.com/
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