A
CONFIGURATION RULES
Configuration Rules
for Gigabit
Ethernet
Gigabit Ethernet is designed to run over several media:
■ Single-mode fiber optic cable, with connections up to 5 km
(3.1 miles). Support for distances over 5 km is supported depending
on the module specification.
■ Multimode fiber optic cable, with connections up to 550 m (1804 ft).
■ Category 5 cabling, with connections up to 100 m (328 ft).
The different types of Gigabit Ethernet media and their specifications are
detailed in Ta b l e 10
.
Table 10 Gigabit Ethernet cabling
Gigabit Ethernet
Transceivers
Fiber Type
Modal
Bandwidth
(MHz/km)
Lengths Supported
Specified by IEEE
(meters)
1000BASE-LX
1000BASE-SX
1000BASE-T
MM = Multimode
62.5 µm MM
50 µm MM
50 µm MM
10 µm SM
62.5 µm MM
62.5 µm MM
50 µm MM
50 µm MM
N/A
SM = Single-mode
500
400
500
N/A
160
120
400
500
N/A
2–550
2–550
2–550
2–5000
2–220
2–275
2–500
2–550
100
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