M10i Internet Router Hardware Guide

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 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® Fiber Cleaner. Follow the directions for the cleaning kit you use.

Maintaining the Power Supplies

To verify that the power supplies are functioning normally, perform the following procedures regularly:

Check that the green OUTPUT OK LED is lit on the faceplate of both power supplies. For more information about the LED, see “Power Supply LED” on page 22.

Issue the following CLI command to check the status of the power supplies. As shown in the sample output, the value OK in the Status column indicates that the power supply is operating normally:

user@host> show chassis environment

 

Class Item

Status

Measurement

Power Power Supply A

OK

 

Power Supply B

OK

 

...

 

 

For further description of the output from the command, see the JUNOS System

Basics and Services Command Reference.

Check the red and yellow alarm LEDs on the HCM. 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 CLI command:

user@host> show chassis alarms

For a list of possible alarm messages, see “Hardware and Interface Alarm

Messages” on page 80.

76Maintaining the Power Supplies

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Juniper Networks M10i manual Maintaining the Power Supplies, Basics and Services Command Reference