But what I would like to do, if there is no response to the prompt is to send them to a voicemail box.
Is there any way to either have the AA default to a speedcall number or to a specific SIP address?
Voice Services -> Auto Attendant -> NumberOnNoInput
is called when there is no response from caller.
Related question: is is possible to send the pound or number sign (#) as part of a dial-plan?
A # should be able to be included in an Auto Attendant DigitMap just as it can in any other DigitMap.