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Fibre Fault Finding

  • Check optical power first-starting at the transmitter and then measuring through the system.
  • Identify where the issue is occurring, is it at one point or the whole system.
  • If at one point, measure optical power through that leg. 
  • If it is the whole system then check the headend or the single fibre trunk.
  • If the optical power is lower than expected, clean the connectors and check keyway alignment.
  • If the optical loss through the cable is greater  than 0.5dB (unless distances are over 1km) suspect the cable or connector.
  • Clean & align again.
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