Connecting to the Punch-down Blocks4-3

2. Label the cables to simplify future troubleshooting.

Figure 4-2. Wiring Closet Connections

Fiber Optic Devices

An optional slide-in 1000BASE-SX, 1000BASE-LX or 100BASE-FX module, or

1000BASE-X transceiver may be used for backbone and long distance connections,

or for ISP (Internet) connections. A 1000BASE-SX, 100BASE-LX or 1000BASE-X

transceiver may also be used for connecting to a high-speed server.

MT-RJ Connections

Each single-mode device requires a 9/125 micron multimode fiber optic cable with

MT-RJ connectors at both ends. Each multimode device requires a 62.5/125 micron

or 50/125 micron multimode fiber optic cable with MT-RJ connectors at both ends.

1. Remove and keep the MT-RJ port’s plastic cover. When not connected to a

fiber cable, the cover should be replaced to protect the optics.

2. Check that the fiber terminators are clean. Dirty fiber terminators on fiber op tic

cables will impair the quality of the light transmitted through the cable and lead

to degraded performance on the port.

3. Connect one end of the cable to the MT-RJ port on the switch and the other end

to the MT-RJ port on the other device. Since MT-RJ connectors are keyed, the

cable can be attached in only one orientation.

4. As each connection is made, check the Link LED on the switch’s front panel for

the corresponding port to be sure that the connection is valid

SC Connections

Each single-imode fiber optic port requires 9/125 micron multimode fibe r optic

cabling with an SC connector at both ends. Each multimode fiber optic port req uires

50/125 or 62.5/125 micron multimode fiber optic cabling with an SC connec tor at

both ends. If you need to connect to a device with 62.5/125 micron cable that ha s

ST-type connectors, Accton provides an optional SC-ST Converter (Part Number:

ST5002).

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PatchPanel

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ToISP (Internet)

PBX

TelephoneLine

fromCentral Office

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VM2512A-1SX-SC-M
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ExpansionModule
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Ycables