6. Arrange the cable in the cable management system to prevent it from dislodging or
developing stress points. Secure the cable so that it is not supporting its own weight
as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in
the cable management system. Placing fasteners on the loop helps to maintain its
shape.
CAUTION: Avoid bending fiber-optic cable beyond its minimum bend
radius.An arc smaller than a few inches in diameter can damagethe cable
and cause problems that are difficult to diagnose.
7. Unseat the PIC:
•
Type 1 or Type 2 PIC—Loosen the captive screws at the top and bottom of the PIC
faceplate.
•
Type 3 PIC—Loosen the captive screw at the bottom of the PIC faceplate, then twist
the ejector handle at the top of the faceplate and counterclockwise to unseat the
PIC.
•
Type 4 PIC—Twist the ejector handle at the bottom of the PIC faceplate, then twist
the ejector handle at the top of the faceplate and counterclockwise to unseat the
PIC.
8. Slide the PIC out of the FPC card carrier, and place it in the electrostatic bag or on the
antistatic mat.
9. If you are not reinstalling a PIC into the emptied PIC slot within a short time, install a
blank PIC panel over the slot to maintain proper airflow in the FPC card cage.
Copyright © 2017, Juniper Networks, Inc.342
T640 Core Router Hardware Guide
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