The time duration interval starts when one of the following conditions occurs:
- A new collection interval for the measurement begins and Alarm 22053 - Route List Unavailable (refer to the DSR Alarms and KPIs Reference for details about this alarm) is asserted.
- Alarm 22053 - Route List Unavailable (refer to the DSR Alarms and KPIs Reference for details about this alarm) is asserted.
When a time duration interval completes, the time measured is added to the total measurement value.