Juniper M7i Hardware Manual page 217

Copyright © 2019, Juniper Networks, Inc.
Issue the CLI
show chassis fpc pic-status
an FPC slot number ( ), which is optional.
0
user@host> show chassis fpc pic-status 0
Slot 0 Online
PIC 0 2x OC-3 ATM, MM
PIC 1 2x CT3-NxDS0
PIC 2 2x OC-3 ATM, MM
For further description of the output from the command, see the
Support cables to prevent them from dislodging or developing stress points.
Place excess cable out of the way, using the cable management system on the rack.
Do not allow fastened loops of cable to dangle from the ladder rack because this
stresses the cable at the fastening point. Putting fasteners on the loops help 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 all interface cables to identify them, labeling each end of the cable the same.
The following guidelines apply specifically to fiber-optic cable:
When you unplug a fiber-optic cable from a FIC or PIC, always place a rubber safety
plug over the transceiver on the FIC or PIC faceplate and on the end of the cable.
Anchor fiber-optic cable to avoid stress on the connectors. When attaching fiber to an
interface, be sure to secure the fiber so it is not supporting its own weight as it hangs
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, such as ATM or SONET/SDH analyzers, 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 micro-deposits of oil and dust in the
canal of the transceiver or cable connector can 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
945/946 Fiber Optic Connector Cleaning System. Follow the directions for the cleaning
kit you use.
After you have cleaned the transceiver on the fiber-optic interface, make sure that the
connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free
fiber-optic cable cleaning kit such as the Cletop - Cletop Reel-Type Cleaner – Part#
CLETOP-RL. Follow the directions for the cleaning kit you use.
Chapter 28: Maintaining Components
command. The following example specifies
CLI Explorer
.
193