Figure 231: Installing A Xenpak Module - Juniper T640 Hardware Manual

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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 interface
module reference for your device. You can also verify PIC functioning by issuing the
show chassis fpc pic-status

Figure 231: Installing a XENPAK Module

T640 Preventing Electrostatic Discharge Damage on page 506
T640 PIC Description on page 79
T640 Packet Forwarding Engine Architecture on page 7
Maintaining T640 PICs and PIC Cables on page 454
Chapter 30: Replacing Switch Fabric Components
command.
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