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Network Failure Handling

Faults are usually dealt with in two phases.

In the first phase (temporary repair) the defective fibre optic cable is temporarily spliced with reserve lengths at existing man holes or in underground joint or splice locations, and all necessary civil works are carried out to ensure a reliable, ongoing network operation. This provisional repair will be completed within an agreed specified time. In brief the steps are:

  • Mobilisation of standby maintenance teams (civil works, installation and testing) via the help desk within the timeframe specified by the customer

  • Identification of the point of failure

  • Accessing the point of failure in areas where the network infrastructure meets standard specifications by the civil work team units

  • Provisionally rectifying the fault on the fibre optic infrastructure by splicing with reserve lengths if necessary

  • Final testing of the provisionally repaired fibre optic cable length

In the second phase (permanent repair) the fault is repaired permanently. In this phase, following a temporary repair, the original condition of the fibre optic cable system is restored. This takes place within a scheduled maintenance window and involves the replacement of the complete cable length in which the fault occurred. In brief the steps are:

  • Permanent reinstatement of the customer?s infrastructure before the fault occurred as part of scheduled planned maintenance

  • Replacement of the provisionally repaired fibre optic cable length with customer-supplied fibre optic cable. This is completed within a scheduled maintenance window to minimise the impact of the work on the network operation

  • Final testing of the repaired fibre optic cable length

  • Documentation of the completed repair

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