The physical link detection function helps reduce the number of alarms generated on links and avoid system performance degradation caused by plenty of alarms that would be otherwise generated.
When plenty of alarms are generated on links, system performance deteriorates because the system has to process the huge number of alarms. You can set thresholds for different types of alarms, so that alarms are generated only when the alarm thresholds are reached. In addition, measures can be taken when necessary to remove faults and guarantee the transmission of normal traffic.