tokens: The fault detector reports a failure to the MPO or MPO has a suspicion of their own fault . The MPO shall examine the failure . The MPO rejects the failure of the fault detector or the MPO confirms the failure of the fault detector . If the MPO confirms the failure of the fault detector , he informes the GO and the MSP . The MPO fixes the fault at the measuring device . The MPO shares the results of the repairs carried out with the fault detector . The MPO will inform the GO about the resolution of the interference . The MPO will inform the MSP about the resolution of the interference .