Yes, it is easy to set up a fail-over, or rollover queue that will be used if the primary queue is down or no agents are available.
To set up a rollover queue, follow these steps:
Go to the ‘Queues’ tab and select the queue you want to edit. Click Edit Queue and you will be brought to queue settings.
In Queue Settings, click on the ‘Broadcast’ tab.
Scroll down to the ‘Queue Rollover’ option, and select from the drop-down list of queues. Pick the queue you’d like to use as a backup for this queue.