I'm trying to configured callcenter to exit app and return to dialplan IF all agents are currently on a call.

I've tried many different strategies and timeouts to very low (like 1 second)

Still the call will sit in the queue.

I've tested this in callback mode with an external agent (outbound call)

The agent's state is 'In a queue call'

This seems like an obvious feature one would need from callcenter, yet I cannot figure out how to configure callcenter this way.

Thanks in advance.