One or Two Way Participation

It is possible to have an ACD group, which is a member of an ANCD group, to work as back up for another ACD group. This is done by receiving calls from the ANCD group but not allowing them to overflow their own calls to other ACD groups via the ANCD group. Participation can also be set in the opposite direction. The ACD group can send calls to the superior ANCD group but not accept incoming calls sent from the superior ANCD group.