Routine Maintenance

The TSR system requires routine maintenance on the following TSR system components:

• Fiber optics
  
  
• Ground connections
  
  
• Power
  
  
• Air filters
  
  

Fiber Cleaning

Unclean fibers are one of the most common causes of system failures. In order to minimize the risk of system failures due to dirty fibers, ensure that you have access to a fiber cleaning kit at the site.

Before installing a module, clean each connector on the OC-3c, OC-12c, OC-48c, and OC-192c modules using dry and or wet cleaning techniques according to manufacturers cleaning guidelines.

Before installing new fiber, inspect the fiber patch cords connecting the TSR system to centralized fiber management systems in the Telcos using an OFS 300 Optical Fiber Scope. Additionally, patch cords in use should be inspected monthly for dirt and damage.

Upon removing any shelf module, the appropriate connectors should be cleaned before the module is inserted back into the shelf.

Ground Connections

Ground connections to TSR system should be checked monthly to ensure that the total leakage current does not exceed 0.1 amps. Leakage above this value is not acceptable and should be investigated.

Power Connections

Power lugs going into the BIP should be checked and tightened as required. The lugs have a tendency to loosen which can cause system failures.

Cleaning and Replacing the Air Filters

The TSR bay has two removable air filters seated horizontally in trays mounted inside the front air intake assembly and rear intake assembly. The filters screen out environmental dust drawn into the system by the cooling modules.

The TSR system uses only UL listed 94H-1, UL 900 Class Universal polyester air filters.

Figure B-1 shows the Universal air filter.

Figure B-1. Universal Air Filter

Filters require removal and cleaning or replacement approximately once every four weeks, more often in highly dusty areas. A damaged or worn filter prevents proper flow of cooling air, which might result in an over temperature condition.

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

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

Step 1 Remove the front and rear air intake grilles to access the front and rear air filters.

Step 2 Leave the green ground wire attached to the TSR system and the rear intake assembly. The front air intake assembly does not have a green ground wire.

Step 3 Hold the front or rear grille a 45-degree angle.

Step 4 With your thumb and forefinger grasp the edge of the air filter through the thumb-hole cutout on the left-side of the attached filter tray.

Step 5 Pull the filter horizontally out the left-side of the filter tray. Refer to Figure B-2 and Figure B-3.

Figure B-2. Front Air Intake Filter Removal and Replacement

Figure B-3. Rear Air Intake Filter Removal and Replacement

CAUTION Do not place tools on the filter tray. Damage to the honey comb screen of the filter can restrict air flow.

Step 6 Visually inspect the condition of the air filter. If the filter is extremely dusty, or appears damaged, replace it with the Universal air filter.

Step 7 If the filter is in good condition and not too dusty, move it away from the system and vacuum it thoroughly.

NOTE To prevent high levels of dust particles from re-entering the system, do not vacuum the filter near the system.

To prevent damage to the filter fibers and metal filter screen, use caution when vacuuming the filter.

Step 8 With your thumb and forefinger grasp the edge of the clean air filter and slide the clean air filter into the front or rear air intake grille until it is in place. Note that the flow direction arrow on the filter faces toward the inside of the grille assembly.

Step 9 Hold the grille assembly at a 45-degree angle.

Step 10 Align the grille assembly with its respective receptacles on the bay frame.

Step 11 Press on the face of the grille assembly to secure it to the frame.

Cooling Modules

It is critical to address cooling module failures immediately as lack of proper cooling will effect the performance of the TSR system.

Filler Modules

Customers should order enough filler modules to ensure that the TSR bay maintains the appropriate air flow. Install filler modules in all empty slots to prevent the system from overheating.

Copyright © 2001 Avici Systems Inc.
Avici® and TSR® are registered trademarks of Avici Systems Inc.
IPriori™ is a trademark of Avici Systems Inc.

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