Dell Brocade G620 Hardware Installation Guide - Page 60

Precautions specific to transceivers and cables, Cleaning the fiber-optic connectors, Managing

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Precautions specific to transceivers and cables Precautions specific to transceivers and cables DANGER All fiber-optic interfaces use Class 1 lasers. DANGER Use only optical transceivers that are qualified by Brocade Communications Systems, Inc. and comply with the FDA Class 1 radiation performance requirements defined in 21 CFR Subchapter I, and with IEC 825 and EN60825. Optical products that do not comply with these standards might emit light that is hazardous to the eyes. CAUTION Before plugging a cable into any port, be sure to discharge the voltage stored on the cable by touching the electrical contacts to ground surface. Cleaning the fiber-optic connectors To avoid problems with the connection between the fiber-optic transceiver (SFP+ or QSFP) and the fiber cable connectors, Brocade strongly recommends cleaning both connectors each time you disconnect and reconnect them. Dust can accumulate on the connectors and cause problems such as reducing the optic launch power. To clean the fiber cable connectors, Brocade recommends using a fiber-optic reel-type cleaner. When not using an SFP+, or QSFP connector, make sure to keep the protective covering in place. Managing cables The minimum bend radius for a 50 micron cable is 2 inches under full tensile load and 1.2 inches with no tensile load. Cables can be organized and managed in a variety of ways, for example, using cable channels on the sides of the rack or patch panels to minimize cable management. Follow these recommendations: NOTE You should not use tie wraps with optical cables because they are easily overtightened and can damage the optic fibers. CAUTION Before plugging a cable into any port, be sure to discharge the voltage stored on the cable by touching the electrical contacts to ground surface. • Plan for rack space required for cable management before installing the switch. • Leave at least 1 m (3.28 ft) of slack for each port cable. This provides room to remove and replace the switch, allows for inadvertent movement of the rack, and helps prevent the cables from being bent to less than the minimum bend radius. 60 Brocade G620 Hardware Installation Guide 53-1003990-01

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Precautions specific to transceivers and cables
DANGER
All fiber-optic interfaces use Class 1 lasers.
DANGER
Use only optical transceivers that are qualified by Brocade Communications Systems, Inc. and
comply with the FDA Class 1 radiation performance requirements defined in 21 CFR
Subchapter I, and with IEC 825 and EN60825. Optical products that do not comply with these
standards might emit light that is hazardous to the eyes.
CAUTION
Before plugging a cable into any port, be sure to discharge the voltage stored on the cable by
touching the electrical contacts to ground surface.
Cleaning the fiber-optic connectors
To avoid problems with the connection between the fiber-optic transceiver (SFP+ or QSFP) and the
fiber cable connectors, Brocade strongly recommends cleaning both connectors each time you
disconnect and reconnect them. Dust can accumulate on the connectors and cause problems such as
reducing the optic launch power.
To clean the fiber cable connectors, Brocade recommends using a fiber-optic reel-type cleaner. When
not using an SFP+, or QSFP connector, make sure to keep the protective covering in place.
Managing cables
The minimum bend radius for a 50 micron cable is 2 inches under full tensile load and 1.2 inches with
no tensile load. Cables can be organized and managed in a variety of ways, for example, using cable
channels on the sides of the rack or patch panels to minimize cable management. Follow these
recommendations:
NOTE
You should not use tie wraps with optical cables because they are easily overtightened and can
damage the optic fibers.
CAUTION
Before plugging a cable into any port, be sure to discharge the voltage stored on the cable by
touching the electrical contacts to ground surface.
•
Plan for rack space required for cable management before installing the switch.
•
Leave at least 1 m (3.28 ft) of slack for each port cable. This provides room to remove and replace
the switch, allows for inadvertent movement of the rack, and helps prevent the cables from being
bent to less than the minimum bend radius.
Precautions specific to transceivers and cables
60
Brocade G620 Hardware Installation Guide
53-1003990-01