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5. Do one of the following:
Upstream Signal Level Verification
A valid optical power level delivered by the ONT must be received by the OLT in burst mode
at 1310 nm that is controlled in the upstream direction by grants given by the OLT.
The individual optical power level that should be present at the optical bulkhead that is
located on the ONT is listed in
To verify the correct upstream optical signal level is present:
1. Ensure all connectors are clean and dry. Refer to the
2. Setup and calibrate an OPM or OLTS that can be placed inline on the optical fiber and is
3. Connect the test equipment to the optical fiber drop cable and the optical bulkhead on
4. Verify the test equipment measurement results are within the optical signal level range
5. If the measurement results are within range, perform a verification of the provisioning of
61287703G1-5B
■ If the results are not within range, perform the necessary testing and verification
steps to validate points further up the network, towards the OLT, to locate the cause
of the optical signal level differences.
■ If the measurement results are within range, perform the steps in
Level Verification"
Table 3-5. Upstream Power Levels
Optical Wavelength
1310 nm
ponents"
on page 3-6 for details.
capable of performing wavelength filtering in order to obtain individual wavelength
optical power level readings.
the ONT using a test jumper as shown in
1490 nm
Drop cable
Figure 3-2. Upstream Test Configuration
described in
Table 3-5
above.
the ONT at the OLT and verify that the proper upstream signal level is being received by
the OLT.
below.
Table
3-5.
Minimum Power Level
0.5 dBm
Figure
OLTS
Section 3, Troubleshooting
"Upstream Signal
Maximum Power Level
5.0 dBm
"Cleaning and Inspection of Com-
3-2.
1310 nm
Test jumper
OPM
or
ONT
3-11
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Troubleshooting
