Maintaining The Pic Fiber-Optic Cable - Juniper M Series Monitoring And Troubleshooting Manual

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Maintaining the PIC Fiber-Optic Cable

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Use the cable management system to support cables and prevent them from being
dislodged or developing stress points.
Place excess cable out of the way in the cable management system and place fasteners
on the loop to help to maintain the shape of the cables. Do not allow fastened loops
of cable to dangle from the system, as this stresses the cable at the fastening point.
Keep the cable connections clean and free of dust and other particles which can cause
drops in the received power level. Always inspect cables and clean them if necessary
before connecting an interface.
Label all PIC cables to identify them. Label each end of the cable the same way.
Checklist for Maintaining Cables and Connectors on page 351
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.
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.
Copyright © 2012, Juniper Networks, Inc.