SMC Networks SMC6724L3 INT manual Connectivity Rules, Mbps Gigabit Ethernet Collision Domain

CONNECTIVITY RULES

Connectivity Rules

When adding hubs (repeaters) to your network, please follow the standard connectivity rules 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
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)
Maximum Fiber Optic Cable Distance for 1000BASE-LX
Fiber Size		Fiber Bandwidth		Maximum Cable Length
9/125 micron		N/A		2 m - 10 km (7 - 32808 ft)
	Maximum Cable Distance for 1000BASE-T
Type		Connector		Maximum Cable Length
Cat. 5, 5e, or 6		RJ-45		100 m (328 ft)
100-ohm UTP
Maximum 1000BASE-ZX Fiber Optic Cable Distance
Fiber Diameter			Fiber Bandwidth		Cable Length Range
9/125 micron single-mode			N/A		70* - 100 km (43.5 - 62.1 miles)
fiber (SMF)

*For link spans exceeding 70 km, you may need to use premium single mode fiber or dispersion shifted single mode fiber.

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