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In a [[system]] the '''mean time between outages''' ('''MTBO''') is the mean [[time]] between equipment failures that result in loss of system continuity or unacceptable [[Degradation (telecommunications)|degradation]]. 

The MTBO is calculated by the equation,

<math>MTBO = \frac{MTBF}{1-FFAS}</math>

where MTBF is the nonredundant [[mean time between failures]] and FFAS is the fraction of failures for which the failed equipment is automatically bypassed. 

==References==
{{FS1037C MS188}}





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[[Category:Technology]]