Radio Frequency Interference; Meeting Power Requirements; Poe Devices; Power Supply Requirements - Extreme Networks Summit X450a-24tDC Hardware Installation Manual

Radio Frequency Interference

If you use UTP cabling in an installation, take precautions to avoid RF interference. RF interference can
cause degradation of signal quality, and, in an Ethernet network environment, can cause excessive
collisions, loss of link status, or other physical layer problems that can lead to poor performance or loss
of communication.
To prevent RF interference, avoid the following situations:
Attaching UTP cable to AC power cables
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Routing UTP cable near antennas, such as a ham radio antenna
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Routing UTP cable near equipment that could exhibit RF interference, such as ARC welding
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equipment
Routing UTP cable near electrical motors that contain coils
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Routing UTP cable near air conditioner units
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Routing UTP cable near electrical transformers
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In areas or applications where these situations cannot be avoided, use fiber optic cabling or shielded
twisted pair cabling (STP).

Meeting Power Requirements

This section describes power requirements, including:

PoE Devices

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Power Supply Requirements

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AC Power Cable Requirements
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Uninterruptible Power Supply Requirements
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PoE Devices
When connecting power over Ethernet (PoE) devices to a PoE switch, all connections between the PoE
device and the switch must remain within the same building and use a low-voltage power distribution
system per IEEE 802.3af.
Power Supply Requirements
Follow these recommendations when you plan power supply connections for the Summit family
switches:
Place the equipment in an area that accommodates the power consumption and component heat
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dissipation specifications.
Be sure that your power supply meets the site DC power or AC power requirements of the network
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equipment.
When you connect power to installed equipment, do not make this connection through an extension
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cord or power strip.
Summit Family Switches Hardware Installation Guide
Meeting Power Requirements
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