Routine Maintenance

The following QSR system components require routine maintenance:

• Fiber optics
  
  
• Power and ground connections
  
  
• Air filters
  
  

Tools

• Flat-head screwdriver
  
  

Fiber Cleaning

Unclean fibers are one of the most common causes of system failures. To minimize the risk of system failures due to dirty fibers, have a fiber cleaning kit at the site.

• Before installing a router module, clean each module connector using the cleaning technique recommended by the manufacturer.
  
  
• Upon removing any module, clean the appropriate connectors before reinserting the module into the chassis.
  
  

WARNING (1) This is a Class 1 laser product. Invisible laser radiation can be emitted from the aperture of the port when the fiber cable is disconnected. Avoid exposure to laser radiation and do not look directly into open apertures.

• Before installing new fiber, inspect the fiber patch cords connecting the QSR to centralized fiber management systems in the Telcos using an OFS 300 Optical Fiber Scope.
  
  
• Perform a monthly inspection of patch cords in use for dirt and damage.
  
  

Power Connections

Once a month, check and tighten all power lugs connected to the power terminal strip.

WARNING (W:B-1) Verify that the site power feed is turned off prior to removing the terminal strip cover and checking power connections. Failure to do so can result in personal injury.

Safety Ground Connections

Once a month, check QSR ground connections to ensure that the total leakage current does not exceed 0.1 amps. Investigate any leakage above this value, which is not acceptable.

WARNING (W:B-2)

Before making adjustments to grounding plate connections, verify that the site power feed is turned off. Failure to do so can result in personal injury.

Cleaning and Replacing the Air Filter

The QSR has a removable air filter that screens out dust drawn into the system by the cooling modules. The air filter snaps into place in a slot located under the cable management tray (see Figure B-1 and Figure B-2).

Remove, and clean or replace filters approximately every four weeks, and more often in high dust areas. Damaged or worn filters prevent the proper air flow for cooling, which can cause an over-temperature condition.

Adhere to all caution and warning statements while performing filter maintenance.

The QSR system uses a UL listed 94H-1, UL 900 Class 2 Universal polyester air filter. If at all possible, keep an extra filter on hand.

Figure B-1. Universal Polyester Air Filter

Figure B-2. Location of Air Filter

PROCEDURE: Use the following steps to remove and replace system air filters:

Step 1 Using a flat-head screwdriver, slip the head of the screwdriver into the slot located in the middle bottom of the air filter. Carefully pry the bottom of the air filter out from the bottom of the chassis (see Figure B-3). Once engaged, the air filter slips out easily.

Figure B-3. Removing the Air Filter

CAUTION (C:B-1) Do not place tools on the filter or filter tray. Damaging the filter can restrict air flow to the system.

- 1

Figure B-4. Removing the Air Filter - 2

Step 2 Visually inspect the air filter.

• If the filter is extremely dusty or damaged, replace it with a new air filter.
  
  
• If the filter is in good condition and not too dusty, move it away from the system and vacuum it thoroughly.
  
  

  NOTE To keep dust particles from re-entering the system, do not vacuum the filter near the system.
  
  Note the side of the filter where dust has accumulated.
  
  To prevent damage to the filter fibers and metal filter screen, use caution when vacuuming.

  Step 3 Hold the cleaned or new air filter by the edges with the foam edge up and the grid work facing down.

CAUTION (3) When replacing a cleaned air filter, the filter must be positioned and reinstalled properly. Replace the cleaned air filter with the side where the dust accumulated facing outward. Minute dust particles may remain on one side of the filter and if the filter is put in incorrectly, these dust particles may be sucked backed into the chassis.

Step 4 Pivot the filter to a 45° angle and slip it into the slot underneath the cable management tray (see Figure B-5), snapping the bottom of the air filter into place.

Figure B-5. Installing the Air Filter

Copyright © 2003 Avici Systems Inc.
Avici® and TSR® is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are trademarks of Avici Systems Inc.

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