JUNOS Internet Software Network Operations Guide: Hardware
282 ! Maintaining the PIC Fiber-Optic Cable
Maintaining the PIC Fiber-Optic Cable
Action To maintain the PIC fiber-optic cable, follow these guidelines:
! Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a
few inches can damage the cable and cause problems that are difficult to
diagnose.
! Anchor fiber-optic cable to avoid stress on the connectors. When attaching fiber
to a PIC, secure the fiber so it is not supporting its own weight as it dangles to
the floor. Never let fiber-optic cable hang free from the connector.
! When you unplug a fiber-optic cable from a PIC, always place a rubber safety
plug over the connector.
! Keep fiber-optic cable connections clean using an appropriate fiber-cleaning
device, such as the RIFOCS 945/946 Fiber-Optic Connector Cleaning System.
Follow the guidelines in the appropriate router hardware guide.
! Frequent plugging and unplugging of fibers into or out of optical instruments,
such as SONET or Asynchronous Transfer Mode (ATM) analyzers, can damage
the instruments, which are expensive to repair. We recommend attaching a
short fiber extension to the optical equipment. Any wear and tear due to
frequent plugging and unplugging is then absorbed by the short fiber extension,
which is easy and inexpensive to replace.
! If a fiber-optic cable is damaged, replace it as described in the appropriate
router hardware guide.
Cleaning the Transceivers
To clean the transceivers, use an appropriate fiber-cleaning device, such as RIFOCS
Fiber Optic Adaptor Cleaning Wands (part number 946). Follow the directions for
the cleaning kit you use.
After you have cleaned the transceiver on the fiber-optic PIC, make sure that the
connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free
fiber-optic cable cleaning kit, such as the Opptex Cletop-S® Fiber Cleaner. Follow the
directions for the cleaning kit you use.
CAUTION: If you do not have a replacement rubber plug in your hand, do not
unplug the fiber-optic cable from a PIC. The safety plug keeps the connection
clean and prevents accidental exposure to light that might be emitted, which can
damage your eyes.
CAUTION: Do not look directly into the PICs installed in the FPC or into the ends of
fiber-optic cable. PICs that use SONET/SDH or ATM single-mode fiber-optic cable
contain laser light sources that can damage your eyes.
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