At approximately 13:35 today, the COIRS system went into an unscheduled Site Trunking condition. The cause was electrical work taking place at the system master site that tripped a breaker unexpectedly. The power was restored and the system returned to normal at approximately 13:40.
Site Trunking worked as designed and there was no interruption of service to subscribers. Dispatchers utilized back up radios during the event.