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Maintaining SFP+ and QSFP+ Transceivers and Fiber-Optic Cables
SFP+ and QSFP+ transceivers and fiber-optic cables must be kept clean and dust-free to maintain
high signal accuracy and prevent damage to the connectors. Attenuation (loss of light) is increased by
contamination and should be below 0.35 dB.
Follow these maintenance guidelines:
• SFP+ and QSFP+ transceivers are static sensitive. To prevent ESD damage, wear an ESD-preventive
wrist strap that is connected to the chassis.
• Do not remove and insert a transceiver more often than is necessary. Repeated removals and insertions
can shorten its useful life.
• Keep all optical connections covered when not in use. If they become dusty, clean before using to
prevent dust from scratching the fiber-optic cable ends.
• Do not touch ends of connectors to prevent fingerprints and other contamination.
• Clean regularly; the required frequency of cleaning depends upon the environment. In addition, clean
connectors if they are exposed to dust or accidentally touched. Both wet and dry-cleaning techniques
can be effective; refer to your site's fiber-optic connection cleaning procedure.
• Inspect routinely for dust and damage. If damage is suspected, clean and then inspect fiber ends under
a microscope to determine if damage has occurred.
Chapter 4. Connecting the IBM c-type SAN Director 133
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