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Troubleshooting
5
Maximum Cable Length
Troubleshooting
If you experience any problems with the module, check the following items before
contacting Accton Technical Support:
• Ensure the switch with the fiber optic module is powered up.
• Ensure that the device attached to the module is powered up and operating correctly.
• Ensure that the module is properly seated in the slot.
• Verify that the module port is configured to match the communication mode used
by the attached device (full or half duplex).
• Check the connectors on both ends of the cable to be sure they are properly
engaged. When attaching fiber cable to an SC-type port, be sure the plug clicks
into place to ensure that it is properly seated.
• If you are using fiber optic cable with an ST-type connector (in conjunction with the
SC-ST converter*), try switching the TX and RX connectors.
• Be sure the fiber terminators are clean. You can clean the cable plugs by wiping
them gently with a clean tissue or cotton ball moistened with a little ethanol. Dirty
fiber terminators on fiber optic cables will impair the quality of the light transmitted
through the cable.
* You may use the Cheetah ST Converter (Part Number: ST5002) to attach 62.5/
125 micron fiber cable with an ST-type connector to the SC-type port on the fiber
optic module.
Cable Types and Specifications
Cable Type Max. Length
Connector
10BASE-T Cat. 3, 4, 5 100-ohm UTP 100 m (328 ft)
RJ-45
100BASE-TX Cat. 5 100-ohm UTP 100 m (328 ft)
RJ-45
100BASE-FX 50/125 or 62.5/125 micron core multimode fiber
Half duplex 412 m (1,351 ft.)
SC or ST
Full duplex 2 km (1.24 miles)
SC or ST
1000BASE-SX 50/125 or 62.5/125 micron core
multimode fiber
See the following
table
SC or ST
Maximum Gigabit Ethernet Cable Length
Fiber Size Fiber Bandwidth Maximum Cable Length
62.5/125 micron 160 MHz/km 7-722 ft (2-220 m)
200 MHz/km 7-902 ft (2-275 m)
50/125 micron 400 MHz/km 7-1641 ft (2-500 m)
500 MHz/km 7-1805 ft (2-550 m)