Juniper MX2010 Hardware Manual page 462

WARNING:
of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected
to a transceiver emit laser light that can damage your eyes.
CAUTION:
inserting or removing cable. The safety cap keeps the port clean and prevents
accidental exposure to laser light.
3. Insert the cable connector into the cable connector port on the component faceplate.
Figure 212: Installing a MIC Cable
Do not look directly into a fiber-optic transceiver or into the ends
Do not leave a fiber-optic transceiver uncovered except when
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