Juniper Networks MX480 - Manual (Page 162)

Related
Documentation
MX480 Modular Interface Card (MIC) Description on page 15 •
• MX480 Modular Interface Card (MIC) LEDs on page 16
• Troubleshooting the MX480 MICs on page 158
• Replacing an MX480 MIC on page 208
Maintaining Cables That Connect to MX480 DPCs, MPCs, MICs, or PICs
Purpose For optimum router performance, verify the condition of the cables that connect to the
DPCs, MPCs, MICs, or PICs.
Action On a regular basis:
• Use the cable management brackets to support cables and prevent cables from
dislodging or developing stress points.
• Place excess cable out of the way in the cable management brackets. Do not allow
fastened loops of cable to dangle from the connector or cable management brackets,
because this stresses the cable at the fastening point. Putting fasteners on the loops
helps to maintain their shape.
• Keep the cable connections clean and free of dust and other particles, which can cause
drops in the received power level. Always inspect cables and clean them if necessary
before connecting an interface.
• Label both ends of the cables to identify them.
The following guidelines apply specifically to fiber-optic cables:
• When you unplug a fiber-optic cable, always place a rubber safety plug over the
transceiver on the faceplate and on the end of the cable.
• Anchor fiber-optic cables to avoid stress on the connectors. Be sure to secure fiber-optic
cables so that they do not support their own weight as they hang to the floor. Never
let fiber-optic cable hang free from the connector.
• Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a few
inches can damage the cable and cause problems that are difficult to diagnose.
• Frequent plugging and unplugging of fiber-optic cable into and out of optical
instruments can cause damage to the instruments that is expensive to repair. Instead,
attach a short fiber extension to the optical equipment. Any wear and tear due to
frequent plugging and unplugging is then absorbed by the short fiber extension, which
is easy and inexpensive to replace.
• Keep fiber-optic cable connections clean. Small microdeposits of oil and dust in the
canal of the transceiver or cable connector could cause loss of light, reducing signal
power and possibly causing intermittent problems with the optical connection.
To clean the transceivers, use an appropriate fiber-cleaning device, such as RIFOCS
Fiber Optic Adaptor Cleaning Wands (part number 946). Follow the directions for the
cleaning kit you use.
Copyright © 2013, Juniper Networks, Inc. 138
MX480 3D Universal Edge Router Hardware Guide