GigE PHY Failure Troubleshooter

Use the following procedure to determine the RX Optical Power from the EMS GUI.

1. In the Common Tree, expand the ONT and select the ESU. The Links screen is displayed.
2. With a row selected, right-click and select Property. The PON Port Property screen is displayed.
3. On the PON Port Property screen, select the ONT Status tab.
   
   
    
4. In the PON Port Property screen, the RX Optical Power is shown for the selected ESU laser.

   Note: The optical power can also be determined by measuring the power levels (refer to Measure the Input/Output Power below).

Measure the Input/Output Power

Laser Safety

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

Warning! 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.

Use the following procedure to measure and diagnose a fiber or laser failure.

1. Measure the Input Power to the ESU: Using an optical power meter, measure the power at the receiving fiber at the ESU. Verify that the power levels being received by the ESU are within specifications.
   • If the light levels are within specification, go to Step 2.
   • If the light levels are low or out of specification, then the problem is the fiber or far end equipment.
     • Measure the power at the far end of the equipment output to ensure it is within specifications. If it is not in spec, replace the far end equipment.
     • If the power measurements are within specification, then at the far end, use local practices to clean and troubleshoot the fiber between the ESU and far end equipment.
2. Measure the ESU Output Power: Using an optical power meter, measure the power at the transmit fiber at the ESU using a short pigtail. If the light levels are not within specification, then the ESU laser has failed, replace the laser (refer to Replace Laser (SFP/XFP) Module), or, if that does not resolve the problem replace, the ESU (refer to Replace an Ethernet Switch Unit (ESU2) or Replace an Ethernet Switch Unit (ESU30 or ESU32), as appropriate).