SMC Networks SMC8126PL2-F 1000BASE-TCable Requirements, Mbps Gigabit Ethernet Collision Domain

Connectivity Rules 4

1000BASE-T Cable Requirements

All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four wire pairs are connected. However, it is recommended that for all critical connections, or any new cable installations, Category 5e (enhanced Category 5) or Category 6 cable should be used. The Category 5e specification includes test parameters that are only recommendations for Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3-2005 standards.

1000 Mbps Gigabit Ethernet Collision Domain

Table 4-1 Maximum 1000BASE-T Gigabit Ethernet Cable Length

Cable Type		Maximum Cable Length		Connector
Category 5, 5e, 6 100-ohm UTP or STP		100 m (328 ft)		RJ-45
Table 4-2 Maximum 1000BASE-SX Gigabit Ethernet Cable Length
Fiber Size	Fiber Bandwidth		Maximum Cable Length		Connector
62.5/125 micron	160 MHz/km		2-220 m (7-722 ft)		LC
multimode fiber
	200 MHz/km		2-275 m (7-902 ft)		LC
50/125 micron multimode	400 MHz/km		2-500 m (7-1641 ft)		LC
fiber
	500 MHz/km		2-550 m (7-1805 ft)		LC
Table 4-3 Maximum 1000BASE-LX Gigabit Ethernet Cable Length
Fiber Size	Fiber Bandwidth		Maximum Cable Length		Connector
9/125 micron	N/A		2 m - 5 km (7 ft - 3.2 miles)		LC
single-mode fiber
Table 4-4 Maximum 1000BASE-ZX Gigabit Ethernet Cable Length
Fiber Size	Fiber Bandwidth		Maximum Cable Length		Connector
9/125 micron	N/A		70 km - 100 km		LC
single-mode fiber			(43 - 62 miles)

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

100 Mbps Fast Ethernet Collision Domain

Table 4-5 Maximum Fast Ethernet Cable Length

Type	Cable Type	Max. Cable Length	Connector
100BASE-TX	Category 5 or better 100-ohm UTP or STP	100 m (328 ft)	RJ-45

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