3Com 3C17203 - SuperStack 3 Switch 4400, Руководство по внедрению

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A
C
ONFIGURATION
R
ULES
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
Table 15 .
Table 15 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
µ
m MM
50
µ
m MM
50
µ
m MM
10
µ
m SM
62.5
µ
m MM
62.5
µ
m MM
50
µ
m MM
50
µ
m 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