During normal operations, software, hardware, or firmware may detect error conditions related to specific MOs. The system attempts to fix or circumvent these problems automatically. Errors are detected in two ways:

• For in-line errors, firmware on the component detects the occurrence of an error during ongoing operations.
• For other types of errors, software performs a periodic test or a scheduled test on occurrence of an error.
  For more information, see Avaya Aura® Communication Manager Alarms, Events, and Logs Reference and Maintenance Commands for Avaya Aura® Communication Manager, Branch Gateways and Servers.

When an error is detected, the maintenance software records the error in the Error Log and increments the error counter for that error. When an error counter is active (greater than zero), there is a maintenance record for the MO. If a hardware component incurs too many errors, an alarm is raised.