Extreme Networks ExtremeSwitching 5420 Series Installation Guide

Calculate Volt-Amperage Requirements
To determine the size of UPS that you need:
1. Locate the voltage and amperage requirements for each piece of equipment.
These numbers are usually found on a sticker on the back or bottom of your
equipment.
2. Multiply the numbers together to get Volt-Amperes (VA):
VA = Volts x Amperes
3. Add the VA from all the pieces of equipment together to nd the total VA
requirement.
To determine the minimum volt-amperage requirements for your UPS, add 30% to
the total.
Provide a Suitable UPS Transition Time
UPS transition time is the time required for the UPS to change from providing AC
power derived from the utility (or mains) supply to providing AC power derived from
the battery backup. UPS transition time is sometimes called UPS transfer time .
UPS transition times vary between UPS models and implementations, but shorter
transition times are preferred. For Extreme Networks stacking products, a UPS
transition time of 20 milliseconds or less ensures optimum performance and minimizes
service interruptions.
For high-availability and fault-tolerant installations in which the switches use
redundant power supply units (PSUs), ensure that each PSU in a switch is connected
to a different UPS and that each UPS is powered by an independent AC supply. This
will prevent service interruptions when a power source is lost, or when a UPS unit
fails. (Note that a single, appropriately sized UPS can power PSUs in multiple switches.
The recommendation is simply that for any given switch, the two PSUs should be
connected to different UPS units.)
Follow Applicable Industry Standards
Always follow applicable industry standards.
For more information, see the following ANSI/TIA/EIA standards:
• ANSI/TIA/EIA-568-A—the six subsystems of a structured cabling system
• ANSI/TIA/EIA-569-A—design considerations
• ANSI/TIA/EIA-606—cabling system administration
• ANSI/TIA/EIA-607—commercial building grounding and bonding requirements
You can access these standards at: www.ansi.org or www.tiaonline.org.
Follow Applicable Industry Standards Site Preparation
54 ExtremeSwitching 5420 Series Hardware Installation Guide

Extreme Networks ExtremeSwitching 5420 Series Specifications

General

Brand	Extreme Networks
Model	ExtremeSwitching 5420 Series
Category	Switch
Language	English