Notification and Downtime

If a downtime is scheduled for server from 7am to 7pm and server goes down at 5pm and stays in down state.
So, the alert triggered when server goes down is suppressed since this happens in downtime period.
Once the downtime is over will the alert be triggered again ?? if not how will we get to know about server status if it continues to remain in down state!!

It depends on the configure renotification period. Let’s say it’s is configure to 90 minutes:

07:00 downtime starts
17:00 system goes down, notification suppressed
18:30 renotification suppressed
19:00 downtime ends
20:00 renotification send

Where the renotification configured ?? or how can I configure that.
Is there any documentation on it!!