Troubleshooting
50
61287802F1-34B
Revision B
The individual optical power level that should be present at the optical bulkhead that is located
.
To verify the correct upstream optical signal level is present:
1. Ensure all connectors are clean and dry. Refer to the
“Cleaning and Inspection of Com
on page 47 for details.
2. Setup and calibrate an OPM or OLTS that can be placed in-line on the optical fiber and is
capable of performing wavelength filtering in order to obtain individual wavelength optical
power level readings.
3. Connect the test equipment to the optical fiber jumper and the optical bulkhead on the
ONT using a test jumper as shown in
Figure 21. Upstream Test Configuration
4. Verify the test equipment measurement results are within the optical signal level range
described in
above.
5. If the measurement results are within range, perform a verification of the provisioning of
the ONT at the OLT and verify that the proper upstream signal level is being received by
the OLT.
6. If the measurement results are not within range, perform a verification of the provisioning
of the ONT at the OLT. If after verifying the provisioning the problem still exists, replace
the ONT.
Table 14. Upstream Power Levels
Optical Wavelength
Minimum Power Level
Maximum Power Level
1490 nm (digital)
–28 dBm
+5 dBm
OPM or OLT’s
ONT
Fiber Jumper
1490 nm
Test Jumper
1310 nm
