In release 8.0 you have 2 possibility to make your scenario:
Circular Ring - searching begins at the member after the last one to receive a call and stops to ring the first available member. If not answered before the Call Ringing Timer expires, the call is redirected away from the group. If the hunt finds no available member, the call is placed in a queue; then, after the Call Queued Timer expires, it is sent to an overflow or rerouting destination.
Circular Cascade Ring - using the circular search method rings the first available group member after the last one to receive a call. Ringing lasts for the duration of the Cascade Ring Timer. When the timer expires, the search continues down the list for the next available member, and so on. When the hunt starting position is reached, the search continues until either a member answers the call or the Call Ringing Timer expires and the call is redirected to an overflow or alternate destination. If the initial search finds no available member, the call queues; then, after the Call Queued Timer expires, it is sent to an overflow or rerouting destination.
All your ring group member should be "Present" , in the overflow choose your destination .
