Triple-Play Service Deployment

Chapter 3: Deploying and Troubleshooting Fiber Networks
Spliced PON testing variation versus connectorized PON
When a connector is replaced by a splice, then the test access
point disappears at that location. During fiber construction, where
splices are used a bare fiber adapter will be required to connect
the test equipment to the fiber link for most tests. During
troubleshooting, due to the lack of mechanically connectorized
ends, a clip-on fiber identifier may also be used to verify whether
traffic is present on the fiber section under investigation. However,
a fiber identifier cannot be used for acceptance testing, as the loss
generated by the clip-on mechanism is not clearly defined and the
power readings are not accurate.
OLT
Video
Patch
cords
Patch
cord
Central Office
Figure 3.14 Test access points
WDM
Coupler
Feeder fiber
OSP distribution
cabinet with
optical splitter
Distribution
fibers
Terminals
Drop
fibers
Segment 1 Segment 2 Segment 3 Segment 4 Segment 5 Segment 6
For example, during installation when there is no connector after
the splitter, the technician must position a bare fiber adapter at the
splitter output to qualify the feeder during construction. Once this
is completed, the splitter output can be spliced to the distribution
fiber. The test then can be performed from the other end of the
distribution fiber using the same process.
ONT
ONT
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