Juniper M120 Hardware Manual page 259

Copyright © 2018, Juniper Networks, Inc.
Orient the XENPAK module so that the optical port faces out, and the transmit (TX)
3.
port is above the receive (RX) port (see
Slide the XENPAK module into the slot.
4.
Tighten the thumbscrews at the top and bottom of the XENPAK module. Verify that
5.
the module is seated properly.
Remove the rubber safety cap from the transceiver and the end of the cable. Insert
6.
the cable into the transceiver.
WARNING: Do not look directly into a fiber-optic transceiver or into the
ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable
connected to a transceiver 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.
Arrange the cable in the cable management system to prevent the cable from
7.
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: 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.
CAUTION: Avoid bending fiber-optic cable beyond its minimum bend
radius. An arc smaller than a few inches in diameter can damage the cable
and cause problems that are difficult to diagnose.
Verify that the status LEDs on the PIC faceplate indicate that the XENPAK module is
8.
functioning correctly. For more information about the PIC LEDs, see the M120
Multiservice Edge Router Interface Module Reference You can also verify PIC functioning
by issuing the
show chassis fpc pic-status
PICs and PIC Cables" on page
Chapter 27: Replacing Line Card Components
Figure 93 on page
command described in
275.
234).
"Maintaining M120
233