Black Box LGB6026A, LGB6001C, LGB6000SC-001 manual Connectivity Rules, 1000BASE-T Cable Requirements

CHAPTER 4 Making Network Connections

Connectivity Rules

CONNECTIVITY RULES

When adding hubs (repeaters) to your network, please follow the connectivity rules listed in the manuals for these products. 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.

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.

10 GBPS ETHERNET COLLISION DOMAIN

Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths

Fiber Size	Fiber Bandwidth		Maximum Cable Length	Connector
62.5/125 micron	160	MHz/km	2-26 m (7-85 ft.)	LC
single-mode fiber
	200	MHz/km	2-33 m (7-108 ft.)	LC
50/125 micron	400	MHz/km	2-66 m (7-216 ft.)	LC
single-mode fiber
	500	MHz/km	2-82 m (7-269 ft.)	LC
	2000 MHz/km		2-300 m (7-984 ft.)	LC
Table 7: Maximum 10GBASE-LR 10 Gigabit Ethernet Cable Length
Fiber Size	Fiber Bandwidth		Maximum Cable Length	Connector
9/125 micron single-	N/A		10 km (6.2 miles)	LC
mode fiber
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