Trixbox Queues

The Queue functionality seems limited to what I am used to but in a simple environment might prove adequate. The only Ring Strategy that seems to work is the 'ringall' choice. All others fail to work. I probably need to google about that... It does support an opening announcement to the caller entering the queue and 'Periodic Announcements' I don't see how I could put a login/logoff , off-duty, break button on the phone.There don't seem to be any access codes to accomodate ACD either. There is a fair amount of flexibilty to the 'overflow' or in Trixbox speak ' Fail Over Destination' availability. I would like to see more options for the agents phones.