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Troubleshooting Tests
An optical power meter can be used to perform the first step in troubleshooting. A power meter
designed for measuring only dbm power levels is suitable for maintenance purposes.
For high attenuation:
•
Remove connector and reclean connector and adapter.
•
Verify cable ties are not too tight.
•
Maintain appropriate fiber bend radius. Make sure there are no sharp bends.
Once a fault is isolated to the installed cable link, an OTDR (Optical Time Domain
Reflectometer) is needed. An OTDR can locate fiber events and measure the losses attributable
to cable, connectors, splices, and/or other components. The graphical display of loss over a
cable's entire length provides the most revealing analysis and documentation available on a
cable link, commonly referred to as its signature trace. Corning Cable Systems recommends
performing an OTDR analysis to document the integrity of the cable system, locate and
measure each event or component, and uncover faults throughout the cable. Follow the
instructions provided with the OTDR tester you are using.
7.
Maintenance
The unit requires very little maintenance to ensure fibers and parts remain in good condition.
•
External components may be cleaned occasionally with a damp, nonabrasive cloth.
•
Check nuts, bolts, and screws; tighten as needed.
•
Check fiber optic cable to make sure bends do not exceed the minimum bend radius.
•
Check cables for unnecessary strain, for crimping or crushing at entries and exits, and for
damage.
•
Check unit record labels to make sure all are clear and accurate.
8.
Growth
Additional connector panels or modules may be installed until the housing is filled to capacity.
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800-743-2675 • FAX: 828-325-5060 • International: +1-828-901-5000 • www.corning.com/opcomm
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STANDARD RECOMMENDED PROCEDURE 003-722 | ISSUE 4 | OCTObER 2015 | PAGE 10 OF 10