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> A network card used in the carrier's backup systems was not working

It should have been redundant, the problem is that the redundancy didn't work and I guess nobody noticed until it was actually needed.

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To be fair to the IT people, the failover system couldn't have been any more redundant.

It's the homeopathic backup problem — they make sure to have a backup because they know that's best practice, but they don't have any checks in place to make sure the backup works.

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