Triple-Play Service Deployment

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Chapter 3: Deploying and Troubleshooting Fiber Networks
Analyzing an RCO outage when all the RCOs are out of service
When all RCOs are out of service, the technician should check the
OLT to verify whether it is transmitting the correct power levels. If
it is not, then OLT should be changed. If the OLT is transmitting
correctly, this indicates an outage in the fiber network. An OTDR
measurement should be performed from the OLT connection
toward the FDH to locate a possible break or bend in the feeder.
The portion of the OTDR trace just before the high loss on the
display indicates the location of the splitter. If a break or bend is
located, steps must be taken for repair. If the feeder is performing
properly, this indicates that the problem may be at the FDH. The
technician should check the connectors and splitters at this
location. Additionally, the technician should use an OTDR to test in
either direction to identify a bend or break.
Step Task Actions if results Actions if results
are Good are Bad
1 Disconnect and measure power
levels at OLTs
Go to step 2 Change OLT
2 Measure the feeder from the OLT
location with OTDR Repair fiber
Go to step 3 Outage in fiber network.
3 Go to the FDH and check
connections
Go to step 4 Fix connection
4 Test distribution network
with OTDR
NA Outage in fiber network