Juniper Internet Router M160 Hardware Manual page 216

M160 Internet Router Hardware Guide
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WARNING: Do not look directly into the ends of fiber-optic cables or into the
transceivers on the interface faceplate. Single-mode fiber-optic cable and the
interfaces that use it (such as ATM and SONET/SDH interfaces) emit laser light
that can damage your eyes.
CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting
or removing cable. The safety cap keeps the port clean and prevents accidental
exposure to laser light.
6.
CAUTION: Do not let fiber-optic cable hang free from the connector. Do not allow
fastened loops of cable to dangle, which stresses the cable at the fastening point.
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Replacing Packet Forwarding Engine Components
is attached to a proper earth ground. For more information about ESD, see
"Preventing Electrostatic Discharge Damage" on page 226.
Verify that a rubber safety cap covers the SFP transceiver, installing one if
necessary.
Orient the SFP over the port in the PIC such that the connector end will enter
the slot first and the SFP connector faces the appropriate direction:
If the PIC has ten SFP ports, the ports are arranged in two columns. The
SFP connector faces to the right for ports in the left column, and to the
left for ports in the right column.
If the PIC has one or two SFP ports, the SFP connector faces to the left on
platforms in which FPCs install vertically in the chassis, and faces upward
on platforms in which FPCs install horizontally in the chassis.
Slide the SFP into the slot. If there is resistance, remove the SFP and try
flipping it so that the connector faces the other direction.
Remove the rubber safety cap from the transceiver and the end of the cable,
and insert the cable into the transceiver.
Arrange the cable in the cable management system to prevent the cable
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.