Configuration Rules For Gigabit Ethernet - 3Com SuperStack 3 3250 Implementation Manual

A
Configuration Rules
for Gigabit
Ethernet
C
ONFIGURATION
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 8.
Table 8 Gigabit Ethernet cabling
Gigabit Ethernet
Transceivers Fiber Type
1000BASE-LX 62.5 m MM
50 m MM
50 m MM
10 m SM
1000BASE-SX 62.5 m MM
62.5 m MM
50 m MM
50 m MM
1000BASE-T N/A
MM = Multimode SM = Single-mode
R
ULES
Modal Lengths Supported
Bandwidth Specified by IEEE
(MHz/km) (meters)
500 2–550
400 2–550
500 2–550
N/A 2–5000
160 2–220
120 2–275
400 2–500
500 2–550
N/A 100