Replacing A T640 Xenpak Module - Juniper T640 Hardware Manual

Replacing a T640 XENPAK Module

Copyright © 2010, Juniper Networks, Inc.
If the PIC has one or two SFP ports, the SFP connector faces to the left on platforms
in which FPCs are installed vertically in the chassis, and faces upward on platforms
in which FPCs are installed horizontally in the chassis.
Slide the SFP into the slot. If there is resistance, remove the SFP and flip it so that the
4.
connector faces the other direction.
Remove the rubber safety cap from the transceiver and the end of the cable, and
5.
insert 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
6.
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 SFP is functioning
7.
correctly (there is an LED for each SFP port). For more information about the PIC
LEDs, see the T640 Core Router PIC Guide. You can also verify PIC functioning by
issuing the
show chassis fpc pic-status
XENPAK modules are optical transceivers that can be removed from a PIC.
Chapter 17: Replacing T640 Router Hardware Components
command.
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