Check Power Level

Laser Safety

Warning 1! Personnel handling fiber optic cables must be trained for laser safety.

Warning 2! Optical Fibers emit invisible laser radiation. Avoid direct exposure to the beam. Never look into the end of a Fiber or into a Fiber connector on a cable or a device. Permanent eye damage or blindness can occur quickly from laser radiation.

This section provides the instructions for installing and testing the fiber connections using the optic power meter to measure power levels, after the Tellabs OLT2 has been turned up.

1. Locate the four Small Form-Factor Pluggables (SFPs) on the Tellabs OLT unit.
    
   
2. Insert the fiber connector end into the SFP.
3. Clean and connect the other end of the fiber connector into the optic power meter. Perform an optical power check on each port, described in Step 4.

   Note: Use the optic power meter for measuring the transmit and receive limits for each SFP, recommended in the Table below.

4. Using the optic power meter, measure the 1490 (nm) downstream optic power levels.
5. Are the 1310nm upstream and 1490nm downstream optic power levels as specified in the table below?

Tellabs OLT1 Optic Levels

• If NO, use these procedures until the optic levels are within the recommended parameters specified in the table above:

6. Check and clean the fiber connections on the Tellabs OLT2 and the optical power meter.
7. Verify that the fiber jumper and accompanying fibers are not pinched or cut and that no micro-bends exist.
8. Verify the optic levels from the table above using another quad fiber jumper. If the optic levels are not verified, this may indicate a bad quad fiber jumper or the Tellabs OLT2. Replace the quad fiber jumper, if required.
9. If the Tellabs unit is bad, contact Tellabs Technical Assistance Center (TAC) for assistance.
10. If, after following the above instructions, the optic levels cannot meet the levels specified in the table above, please contact Tellabs Technical Assistance Center (TAC).