Fiber Optic Cable; Radio Frequency Interference - Extreme Networks BlackDiamond X8 Series Hardware Installation Manual

Fiber Optic Cable

Fiber optic cable must be handled carefully during installation. Every cable has a minimum bend
radius, for example, and fibers will be damaged if the cables are bent too sharply. It is also important
not to stretch the cable during installation. Extreme Networks recommends that the bend radius for
fiber optic cable equal 2 inches (5.08 cm) minimum for each 90 degree turn as shown in
NOTE
Kinks and sharp bends can destroy or impair the cable's ability to convey light pulses accurately from one
end of the cable to the other. Use care in dressing the optical fiber cables: provide satisfactory strain relief to
support the cable and maintain an adequate bend radius at all cable turns, particularly where the cable connects to
the I/O module.
Figure 12: Bend Radius for Fiber Optic Cable
1 = Minimum 2-inch (5.08 cm) radius in 90° bend

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 an amateur radio antenna
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Routing UTP cable near equipment that could exhibit RF interference, such as ARC welding
●
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
●
In areas or applications where these situations cannot be avoided, use fiber optic cabling or shielded
twisted pair cabling (STP).
BlackDiamond X8 Series Switches Hardware Installation Guide
1
90°
Evaluating and Meeting Cable Requirements
Figure 12.
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