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 clean an optical transceiver, 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 Fiber Cleaner. Follow the directions for the cleaning kit you
use.
Related
Documentation
Maintaining MX480 DPCs on page 420•
• Maintaining MX480 MPCs on page 431
• Maintaining MX480 MICs on page 430
• Maintaining MX480 PICs on page 433
Maintaining the MX480 Power Supplies
Purpose For optimum router performance, verify the condition of the power supplies.
Action On a regular basis:
• PEM 0 status:
State Online
Temperature OK
AC Input: OK
DC Output Voltage(V) Current(A) Power(W) Load(%)
59 0 0 0
PEM 1 status:
State Online
Temperature OK
AC Input: OK
DC Output Voltage(V) Current(A) Power(W) Load(%)
59 18 1062 42
• Make sure that the power and grounding cables are arranged so that they do not
obstruct access to other router components.
• Routinely check the status LEDs on the power supply faceplates and the craft interface
to determine if the power supplies are functioning normally.
• Check the red and yellow alarm LEDs on the craft interface. Power supply failure or
removal triggers an alarm that causes one or both of the LEDs to light. You can display
the associated error messages by issuing the following command:
435Copyright © 2017, Juniper Networks, Inc.
Chapter 29: Maintaining Components
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