Upstream Signal Level Verification; Figure 29. Downstream Test Configuration; Table 13. Upstream Power Levels - ADTRAN Total Access 300 Series Installation And Maintenance Manual

Total Access 300 GigE SFU ONT with RF Overlay and SWRD Powering Installation and Maintenance Guide
To verify the correct downstream optical signal levels are present:
1.Ensure all connectors are clean and dry. Refer to "Cleaning and Inspection of Compo‐
2. Setup and calibrate the OPM or OLTS for wavelengths that apply to FTT transmissions
3.
4. Verify the test equipment measurement results are within the optical signal level ranges
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 on the GPON
to assure proper ONT ranging and operation. The laser output of the ONT is 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 Table 13.
Optical Wavelength
1310 nm
52
nents" on page 50 for details.
(that is, 1310 nm, 1490 and 1550 nm). Verify the test equipment is capable and setup for
wavelength filtering to avoid obtaining an undesired reading of the absolute optical
power from all contributing wavelengths. Instead, try to measure the individual
wavelength optical power levels.
Connect optical fiber drop cable to the test equipment as shown in Figure
29.

Figure 29. Downstream Test Configuration

described in Table 12 above.
• If the results are not within range, complete 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, complete the steps in "Upstream Signal
Level Verification" on page 52.
1550 nm
1490 nm
Drop cable

Table 13. Upstream Power Levels

Minimum Power Level
0 dBm
OPM
or
OLTS
Maximum Power Level
+5 dBm
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