Triple-Play Service Deployment

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Acceptance testing is always performed end to end, so the fiber
links to be analyzed must be connectorized at both ends. If there
is only one overall zone for the complete FTTx optical network
(connectors at each end of the network only), then an overall
acceptance test can be performed. If the fiber link is split into two
zones with connectors, then acceptance testing should be carried
out on each of the two zones.
It is particularly challenging to test through the splitter with an
OTDR when there are multiple fibers connected after the splitter.
When performing an OTDR test from the CO to the customer
premises, the best approach is to disconnect all of the splitter
outputs except the one running to the customer premises. This
makes it much easier to interpret the OTDR test results; however, a
large loss—up to 19 dB with a 1x64 splitter—will still be seen at
the splitter location. For further information about testing through
the splitter with an OTDR, please refer to Appendix A.
Figure 3.15 OTDR trace sample
Chapter 3: Deploying and Troubleshooting Fiber Networks
The source/power meter/ORL combination provides an end-toend
test which only offers overall measurements of the fiber link.
For troubleshooting purposes, a clip-on fiber identifier can be
used to identify the faulty segment. As an example, moving from
the customer premises to the CO, at each location where the