Accton Technology ES3628EA manual Connectivity Rules, 1000BASE-T Cable Requirements, Cable Type

4 Making Network Connections

6.As a connection is made, check the Link LED on the switch corresponding to the port to be sure that the connection is valid.

100BASE-FX fiber optic ports operate a 100 Mbps full duplex. 1000BASE-SX, 1000BASE-LX and 1000BASE-LH fiber optic ports operate at 1 Gbps full duplex. All of these SFP modules also support auto-negotiation of flow control. The maximum length for fiber optic cable depends on the fiber type as listed under “100 Mbps Fast Ethernet Collision Domain” on page 4-5 and “1000 Mbps Gigabit Ethernet Collision Domain” on page 4-4.

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 802.3-2002 (formerly IEEE 802.3ab) 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

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