Connectivity Rules; 1000 Mbps Gigabit Ethernet Collision Domain - SMC Networks SMC SMCBGLLCX1 Installation Manual

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ETWORK LANNING

Connectivity Rules

When adding hubs (repeaters) to your network, please follow the
connectivity rules listed below for Ethernet, Fast Ethernet, and Gigabit
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 1000BASE-T Gigabit Ethernet Cable Length
Cable Type
Category 5, 5e 100-ohm UTP or STP
Maximum 1000BASE-SX Fiber Optic Cable Distance
Fiber Diameter
62.5/125 micron
multimode fiber (MMF)
50/125 micron MMF
Fiber Diameter
9/125 micron single-mode
fiber (SMF)
Note: Although maximum cable length for 100BASE-FX fiber depends
on the duplex mode, the maximum length for 1000BASE-X fiber
is the same for both half and full duplex.
2-6
Maximum 1000BASE-LX Fiber Optic Cable Distance
Maximum Cable Length
100 m (328 ft)
Fiber Bandwidth
160 MHz/km
200 MHz/km
400 MHz/km
500 MHz/km
Fiber Bandwidth
N/A
Cable Length Range
2-220 m (7-722 ft.)
2-275 m (7-902 ft.)
2-500 m (7-1641 ft.)
2-550 m (7-1805 ft.)
Cable Length Range
2 m - 5 km (7-16,404 ft)