C
ONNECTIVITY
R
ULES
2-5
Connectivity Rules
When adding hubs (repeaters) to your network, please follow the
connectivity rules listed below for Ethernet or Fast Ethernet.
However, note that because switches break up the path for
connected devices into separate collision domains, you should not
include the switch or connected cabling in your calculations for
cascade length involving other devices.
1000 Mbps Gigabit Ethernet Collision Domain
Maximum Fiber Optic Cable Distance for 1000BASE-SX
Maximum Fiber Optic Cable Distance for 1000BASE-LX
Maximum Cable Distance for 1000BASE-T
Fiber Size Fiber Bandwidth Maximum Cable Length
62.5/125 micron 160 MHz/km 2-220 m (7-722 ft)
200 MHz/km 2-275 m (7-902 ft)
50/125 micron 400 MHz/km 2-500 m (7-1641 ft)
500 MHz/km 2-550 m (7-1805 ft)
Fiber Size Fiber Bandwidth Maximum Cable Length
9/125 micron N/A 2 m - 5 km (7 - 16404 ft)
Type Connector Maximum Cable Length
Cat. 5, 5e
100-ohm UTP
RJ-45 100 m (328 ft)
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