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Chapter 1
Introduction
Section 1.5.2
Gigabit Ethernet 1000Base-TX Cabling Recommendations
The IEEE 802.3ab Gigabit Ethernet standard defines 1000 Mbit/s Ethernet communications over distances of up
to 100 m (328 ft) using all 4 pairs in category 5 (or higher) balanced, unshielded twisted-pair cabling. For wiring
guidelines, system designers and integrators should refer to the Telecommunications Industry Association (TIA)
TIA/EIA-568-A wiring standard that characterizes minimum cabling performance specifications required for proper
Gigabit Ethernet operation. For reliable, error-free data communication, new and pre-existing communication
paths should be verified for TIA/EIA-568-A compliance.
The following table summarizes the relevant cabling standards:
Cabling Category
< 5
5
5e
6
> 6
Follow these recommendations for copper data cabling in high electrical noise environments:
• Data cable lengths should be as short as possible, preferably 3 m (10 ft) in length. Copper data cables should
not be used for inter-building communications.
• Power and data cables should not be run in parallel for long distances, and should be installed in separate
conduits. Power and data cables should intersect at 90° angles when necessary to reduce inductive coupling.
• Shielded/screened cabling can be used when required. Care should be taken to avoid the creation of ground
loops with shielded cabling.
Section 1.5.3
Supported Fiber Optic Cables
The following fiber optic cable types are supported under the stated conditions.
Cable Type
OM1 (62.5/125)
OM2 (50/125)
a
OM3 (50/125)
a
OM4 (50/125)
a
Laser optimized.
6
1000Base-
TX Compliant
No
Yes
Yes
No action required. New installations should be designed with Category 5e or higher.
Yes
Yes
Modal Bandwidth
Wavelength (nm)
(MHz·km)
850
1300
850
1300
850
1300
850
1300
New wiring infrastructure required.
Verify TIA/EIA-568-A compliance.
No action required.
Connector and wiring standards to be determined.
100Base-FX
200
—
500
2000
500
—
500
2000
1500
—
500
2000
3500
—
500
2000
Gigabit Ethernet 1000Base-TX Cabling Recommendations
Required Action
Distance (m)
1000Base-SX
275
—
550
—
550
—
550
—
RUGGEDCOM RST2228
Installation Guide
10GBase-SR
33
—
82
—
300
—
400
—
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