MRV Communications MR2228-S2C User Manual download pdf (Page 28)

transmitted through the cable and lead to degraded performance on the port.

3. Connect one end of the cable to the LC port on the switch and the other end to

the LC port on the other device. Since LC connectors are keyed, the cable can be

attached in only one orientation.

Figure 4-3. Making Fiber Port Connections

4. As a connection is made, check the Link LED on the switch corresponding to

the port to be sure that the connection is valid. The 1000BASE-SX, 1000BASE-LX,

1000BASE-LH fiber optic ports operate at 1 Gbps, full duplex, with

auto-negotiation of flow control. The maximum length for fiber optic cable

operating at Gigabit speed will depend on the fiber type as listed under “1000

Mbps Gigabit Ethernet Collision Domain” on page 4-5.

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 and 6 specifications include test parameters that are only

recommendations for Category 5. Therefore, the first step in preparing existing

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MRV Communications MR2228-S2C User Manual Page 28