Customer is a bank with two locations networked together (both FXII). The main location is the hub and the branch office located a few blocks away is the node.

The hub wants their main number (PRI/DID) to ring the existing ring-all hunt group that is the lobby phones. If no answer in two rings, then ring the similar ring-all hunt group at the branch.

How is the best way to accomplish this?

Can a hunt group in a node be an overflow destination?

Is there a way for the node to know its a call from the hub by distinctive ring tone?

Can both hunt groups ring simultaneously? In other words, ring the hub and if no answer then ring both hub and node hunt groups together?

Thanks for any input!