Cisco Nexus 93120TX Hardware Installation Manual page 41

Connecting the Switch to the Network
• Keep the transceivers and fiber-optic cables clean and dust free to maintain high signal accuracy and to
prevent damage to the connectors. Contamination causes increased attenuation (loss of light), and should
be kept below 0.35 dB.
• Inspect routinely for dust and damage. If you suspect damage, clean and then inspect fiber ends under a
microscope to determine if damage has occurred.
• To minimize the chance of damaging transceivers when installing them, slide them gently into their
switch slots. Never force transceivers all the way into the slots. If the transceiver stops part way into the
slot, it might be upside down. Remove the transceiver before turning it over and reinstalling it. If positioned
correctly, the transceiver slides all the way into the slot and clicks when fully installed.
Warning
Statement 1051 Laser Radiation
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or
view directly with optical instruments.
Warning Statement 1055 Class 1/1M Laser
Warning – Invisible Laser Radiation. Do not expose users of telescopic optics. Class 1/1M Laser Products.
Warning
Statement 1056 Unterminated Fiber Cable
Invisible laser radiation may be emitted from the end of the unterminated fiber cable or connector. Do not
view directly with optical instruments. Viewing the laser output with certain optical instruments (for example,
eye loupes, magnifiers, and microscopes) within a distance of 100 mm may pose an eye hazard.
• Clean these parts before installation to prevent dust from scratching the fiber-optic cable ends.
• Clean the connectors 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 procedures.
• Do not touch the ends of connectors. Touching the ends can leave fingerprints and cause other
contamination.
Cisco Nexus 93120TX NX-OS Mode Switch Hardware Installation Guide
Guidelines for Connecting Ports
31