Juniper T640 Hardware Manual page 187

Copyright © 2010, Juniper Networks, Inc.
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 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.
After you have cleaned the transceiver on the fiber-optic PIC, 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 Opptex Cletop-S
directions for the cleaning kit you use.
Check the LEDs on PIC faceplates. The meaning of the LED states differs for various
PICs. For more information, see the T640 Core Router PIC Guide. If the FPC that houses
the PIC detects a PIC failure, the FPC generates an alarm message to be sent to the
Routing Engine.
Issue the CLI show chassis fpc pic-status
numbered from through
0
user@host> show chassis fpc pic-status
Slot 0 Online
PIC 0 Online
PIC 2 Present
PIC 3 Online
Slot 2 Online
PIC 0 Online
PIC 1 Online
PIC 2 Online
Slot 3 Online
PIC 0 Online
PIC 1 Online
PIC 2 Online
PIC 3 Online
Slot 4 Online
PIC 0 Online
Slot 6 Online
PIC 0 Online
PIC 1 Online
Chapter 15: Maintaining T640 Router Hardware Components
command. The PIC slots in an FPC are
, top to bottom:
3
E-FPC Type 3
1x 10GE(LAN),DWDM
1x OC-192 SONET XFP- Hardware Error
1x 10GE(LAN),XENPAK
E2-FPC Type 2
1x OC-48 SONET, SMIR
2x OC-12 ATM-II IQ, MM
8x 1GE(LAN), IQ2
FPC Type 3
1x 10GE(LAN),XENPAK
1x 10GE(LAN),XENPAK
8x 1GE(TYPE3), IQ2
8x 1GE(TYPE3), IQ2
FPC Type 4
4x OC-192 SONET XFP
FPC Type 3
4x OC-48 SONET
1x Tunnel
®
Fiber Cleaner. Follow the
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