SMC Networks SMC6826MPE 1000BASE-T Cable Requirements, Mbps Gigabit Ethernet Collision Domain

MAKING NETWORK CONNECTIONS

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 and 6 specifications include 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 802.3ab standards.

1000 Mbps Gigabit Ethernet Collision Domain

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

Cable Type	Maximum Cable	Connector
	Length
Category 5, 5e, or 6 100-ohm UTP	100 m (328 ft)	RJ-45
or STP

Table 4-2 Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths

Fiber Size	Fiber	Maximum Cable	Connector
	Bandwidth	Length
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	400 MHz/km	2-500 m (7-1641 ft)	LC
multimode fiber
	500 MHz/km	2-550 m (7-1805 ft)	LC

Table 4-3 Maximum 1000BASE-LX Gigabit Ethernet Cable Length

Fiber Size	Fiber	Maximum Cable	Connector
	Bandwidth	Length
9/125 micron	N/A	2 m - 5 km (7 ft - 3.2	LC
single-mode fiber		miles)

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