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3-7
Cisco Nexus 3000 Series Hardware Installation Guide
OL-25338-04
Chapter 3 Connecting to the Network
Maintaining SFP and SFP+ Transceivers and Fiber-Optic Cables
Maintaining SFP and SFP+ Transceivers and Fiber-Optic CablesQSFP+, SFP+, and SFP transceivers and fiber-optic cables must be kept clean and dust-free to maintain
high signal accuracy and prevent damage to the connectors. Atte nuation (loss of lig ht) is increased by
contamination and s hould be below 0.35 d B.
Consider the following m aintenance guidelines:
• Optical transceivers are static sensit ive. 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 use ful life.
• Keep all optical connections covered when not in use. If they become dusty, clean before using to
prevent dust from scr atching the fiber-opti c 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 d amage. If damage is suspected , clean and then inspect fiber end s
under a microscope to determine if damage has occurred.