Cleaning The Connectors; Signal Level Verification; Downstream Signal Level Verification; Table 11. Downstream Power Level - ADTRAN Total Access 372E Installation And Maintenance Manual

• Use microporous fabric spiral wrapped cleaning tips to clean bulkhead ferrules.
• Do not use compressed air to clean optical bulkheads.

Cleaning the Connectors

To clean the connector, complete the following steps:
1. Wrap the cleaning wipe around the exposed connector endface, apply firm pressure, and
2. Press the endface of the ferrule directly into a clean, wet spot on the wipe and twist the
3. Inspect the endface of the ferrule with either the fiberscope or videoscope. If further

Signal Level Verification

The following sections detail signal level verification if problems are encountered when
service activation of an installed ONT is performed. Both Downstream signal Level Verifi-
cation on page 38 and

Downstream Signal Level Verification

A valid optical power level delivered by the OLT must be received at the drop cable point to
assure proper SBU ONT ranging and operation. There is one optical wavelength (1490 nm) to
consider in the downstream direction that will contribute to the absolute optical power level
delivered to the SBU ONT.
The 1490 nm wavelength is used for digital data. The individual optical power levels that
should be present at the optical fiber that is connected to the SBU ONT are listed in
To verify the correct downstream optical signal levels are present:
1. Ensure all connectors are clean and dry. Refer to
2. Setup and calibrate the OPM or OLTS for wavelengths that apply to FTT transmissions
61287723G1-5B
twist the wipe around the ferrule back and forth in quarter to half-turn rotations at least
three times.
ferrule while applying pressure to perform a wiping action.
cleaning is warranted, use the fabric type cleaner to continue cleaning according to the
cleaner instructions. Remember an angle polished connector is in use so refer to that
specific section of the fabric type cleaner's instructions.
"Upstream Signal Level Verification"

Table 11. Downstream Power Level

Optical Wavelength
1490 nm (digital)
nents" on page 36 for details.
(that is 1310 nm and 1490). Verify the test equipment is capable and setup for wavelength
filtering so that you do not obtain an undesired reading of the absolute optical power
from all contributing wavelengths. Instead you are trying to measure the individual
wavelength optical power levels.
on page 38 are discussed.
Minimum Power Level
–28 dBm
"Cleaning and Inspection of Compo-
Troubleshooting
Table 11.
37