Installation guide

Meeting Power Requirements
BlackDiamond 20808 Switch Hardware Installation Guide
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Replacing the Power Cord
If the AC power cord plug is unsuitable and must be replaced, connect the power supply wires for the
switch according to the following scheme:
● Brown wire to the Live (Line) plug terminal, which may be marked with the letter “L” or colored
red.
● Blue wire to the Neutral plug terminal, which may be marked with the letter “N” or colored black.
● Yellow/Green wire to the Ground plug terminal, which may be marked with the letter “E” (the
Earth symbol) or colored yellow/green.
Uninterruptible Power Supply Requirements
An uninterruptible power supply (UPS) is a device that sits between a power source (such as an AC
wall outlet) and a device (such as a power supply in 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 some time after a blackout has occurred.
In addition, some UPS 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.
Selecting 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 your installation will allow?
NOTE
Extreme Networks recommends that you use a UPS that provides online protection.