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Maintenance 87
Maintenance and
Replacement
Maintenance
Good system performance requires clean port optics and cable ferrules to avoid
obstructing the optical path. The following preventive maintenance will protect the hub for
longer use.
• Vacuum to remove dust.
• Leave the FC port covers on unused FC ports.
• Replace the fan module every three years.
• Avoid dropping fiber optic cable ends. This can cause internal glass fractures and
intermittent signals.
• Keep unused cable ends covered to avoid contaminant-obscured or attenuated light
signals.
• Never insert foreign objects into the optical transmit and receive ports.
• Avoid bending fiber cables over more than a 3-cm bend radius.
When a faulty connection is suspected, blowing clean compressed air on the FC port and
cable end often is sufficient to remove dirt particles. Cleaning the connectors with
methanol on a lint-free cloth is also effective. Alcohols that can be used include methyl,
isopropyl, and isobutyl. Other acceptable substances for cleaning fiber optics are hexane
and heptane aliphatics, soap solution, and naphtha.
Caution DO NOT use partially halogenated hydrocarbons, ketones, acetone,
chloroform, ethyl acetate, methylene dichloride, phenol, methylene chloride, or
N-methylpyrolldone to clean the connectors.