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Chapter 5
Troubleshooting and Maintenance
5.1
Troubleshooting Fiber Optic Cables
All optical cables should be connected using a Tx to Rx, or Rx to Tx orientation for correct MUX
and DEMUX signal operation. Proper labeling of each connecting cable is highly recommended.
5.2
Troubleshooting Guide
The 6002/3/4 models are passive, unidirectional WWDMs. The modules provide simultaneous
transmission of two to four optical signals over a composite SMF pair. Keeping all optical
pathways clean and dust free is imperative for trouble-free operation. Refer to Table 1.
Table 1. Troubleshooting Cause and Solution Chart
Symptom
Local or remote
equipment is not
receiving optical
signal
®
EdgeAccess
Universal Chassis System
Possible causes
1. Dirty fiber optic cable
2. Bad connection to
equipment
3. Optical loss budget has
been exceeded
4. Fiber optic cable cut
5. Fiber optic cables crossed
6. Local or remote equipment
not transmitting sufficient
optical signal
6002/6003/6004 WWDM Users Manual
Solution
1. Clean all fiber optic cables in the
circuit
2. Replace fiber optic cable
connection
3. Check loss budget of equipment
being installed
4. Check the condition and
integrity of all fiber optic cables
in the circuit. Immediately
replace or repair cut fiber optic
cable.
5. Reconfigure the link using the
Rx to Tx orientation
6. Measure the optical transmit
power of equipment using an
optical power meter. Determine
that the equipment is providing a
sufficient optical signal.
5-1
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