Juniper Networks M10i manual Maintaining PICs and PIC Cables

Chapter 11: Maintaining Hardware Components

user@host> show chassis fpc pic-status

Slot 0 Online
PIC 0	4x	OC-3	SONET, MM
PIC 1	1x	CSTM1, SMIR
PIC 3	2x	OC-3	ATM, MM
Slot 1 Online
PIC 0	1x	OC-12		SONET, MM
PIC 1	1x	OC-12		ATM, MM
PIC 2	2x	OC-3	ATM, MM
PIC 3	2x	OC-3	ATM, MM

For further description of the output from the command, see the JUNOS System Basics and Services Command Reference.

■Use the cable management system (shown in Figure 10) to support cables and prevent cables from dislodging or developing stress points.

■Place excess cable out of the way in the cable management system. Do not allow fastened loops of cable to dangle from the connector or cable management system, 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 PIC cables to identify them.

The following guidelines apply specifically to fiber-optic cable:

■When you unplug a fiber-optic cable from a PIC, always place a rubber safety plug over the transceiver on the PIC faceplate and on the end of the cable.

■Anchor fiber-optic cable to avoid stress on the connectors. When attaching fiber to a PIC, 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

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