Juniper MX2020 Hardware Manual page 563

9. Grasp both knobs, and rotate them clockwise simultaneously until the MPC is fully seated into the
ADC.
10. Remove the rubber safety cap from each fiber-optic transceiver and cable.
WARNING:
of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected
to a transceiver emit laser light that can damage your eyes.
Figure 239: Installing an MPC into an ADC
11. Insert the cables into the cable connector ports on each MPC (see
Do not look directly into a fiber-optic transceiver or into the ends
Figure 240 on page 546).
545