Perform Optic Power Level Testing

This section provides the instructions for installing and testing the fiber connections using the optic power meter to measure power levels, after the Tellabs OLT1 has been turned up. Refer to Turn Up the Tellabs OLT1.

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.

Fiber Optic Cable

Ensure that the fiber connectors are properly cleaned per local standards. Dirty connectors may result in inaccurate measurements.

Caution 1: Fiber optic cable installation and maintenance should only be performed by trained service personnel.

Caution 2:  Do not bend the fiber optic cable to a diameter smaller than 7.5cm/3 inches. Doing so may damage the fiber or prevent the signal from passing through properly.

Electrostatic Discharge (ESD)

Observe and follow all ESD instructions while handling Tellabs plug-in equipment.

Caution! The Tellabs plug-in equipment uses semiconductor devices that can be damaged by electrostatic discharge (ESD). Do not remove a plug-in from a protective packing box or equipment rack until the time of installation or replacement. To equalize the static charge on the plug-in, establish a body path to the ground using an ESD wrist strap connected to an ESD ground. [If storing or shipping the plug-in becomes necessary, place the plug-in in a conductive shipping box to prevent static buildup.]

Apply the following precautions:

• Use grounded wrist straps, table mats, floor mats
• Handle static-sensitive devices in the nonconductive areas
• Place static-sensitive cards into an antistatic plastic bag    
• Use protective ESD-sensitive packing and shipping bags when returning repairable components

Check Optic Power Levels

1. Locate the four pre-installed 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 Table 1.

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 Table 1?

Table 1: Tellabs OLT1 Optic Levels

• If NO, use these procedures until the optic levels are within the recommended parameters specified in Table 5:

6. Check and clean the fiber connections on the Tellabs OLT1 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 Table 5 using another quad fiber jumper. If the optic levels are not verified, this may indicate a bad quad fiber jumper or the Tellabs OLT1. 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 Table 5 please contact Tellabs Technical Assistance Center (TAC). Refer to Maintenance for instructions.