0.1" = 1mm actual
39.37% : 254%
SPG_001
Not recommended
Better
Best
Figure 21: RJ45 Connector Jacket Types
Prevent Radio Frequency Interference (RFI)
If you use UTP cabling in an installation, take precautions to avoid radio frequency (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
• Routing UTP cable near antennas, such as a ham radio antenna
• Routing UTP cable near equipment that could exhibit RF interference, such as ARC
welding equipment
• Routing UTP cable near electrical motors that contain coils
• Routing UTP cable near air conditioner units
• Routing UTP cable near electrical transformers
In areas or applications where these situations cannot be avoided, use ber optic
cabling or shielded twisted pair cabling.
Meet Power Requirements
Observe the following requirements and precautions for powering your hardware.
Requirements for PoE Devices
When connecting 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.
Site Preparation Prevent Radio Frequency Interference (RFI)
ExtremeSwitching 5320 Series Hardware Installation Guide 37
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