I already screwd my brain about it and did it with POT-Ports and external dailers.
You got a user in the huntgroup, and the port is call-forwarded bij the external dailer.
The huntgroup let the next call in que till the line is free.
This works but only for a small use.
If you use a phantom user the ip-office dont see the next call as busy and you don,t go in the que.
But maby somebody else now a nice way.
Greets Peter