This attribute displays whether the Path Signal Label Mismatch (P- SLM) failure condition has been entered. An P-SLM failure condition is entered when P-SLM defects have been observed and accumulated for period of 2.5 seconds +/- 0.5 seconds. An P-SLM defect occurs when detecting an unexpected path signal label. The expected Path signal labels are 'Mapping for ATM' or 'Equipped - Non Specific Payload'. If the P-SLM defects are intermittently occurring, the P-SLM defect accumulator is decremented at a rate of 1/10 of the incrementing rate (alarm integration ratio of 1/10), with all measurements based on a 200 ms polling cycle. The Path component goes into an operational state of disabled until the Path Signal Label Mismatch failure condition is cleared. The condition is cleared when an expected path signal label is received for 10 seconds +/- 0.5 seconds. The signalLabelMismatch attribute is always set to off when the Path component has been locked and left offline by the operator or when the Path component has been suspended since the parent component has been locked.