Extreme Networks ExtremeSwitching 5520 Series, Руководство по установке оборудования

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Using RJ45 Connector Jackets
Use RJ45 cable with connector jackets that are flush with the connector or that have connectors with a
no-snag feature.
Using cable with jackets that are wider than the connectors can cause:
•
Connectors that are not properly aligned with the port.
•
Crowded cable installation, which can cause connectors to pop out of the port.
Figure 34 shows examples of recommended and non-recommended connector jacket types.
0.1" = 1mm actual
39.37% : 254%
SPG_001
Not recommended
Better
Best
Figure 34: RJ45 Connector Jacket Types
Preventing 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 fiber optic cabling or shielded
twisted pair cabling.
Using RJ45 Connector Jackets Site Preparation
48 ExtremeSwitching 5520 Series Hardware Installation Guide