I have a new Partner ACS R6 with a Partner VS Mail. It will not transfer to a station's mailbox if the station has it's DND feature activated. It worked with the Partner II I replaced. The caller hears the message: "your call is being transfered", as it should. After a short pause the AA says "your call is being transfered to the receptionist". The call goes to her mail box if not answered. If she has her DND active the caller hears "your call is being transfered to the receptionist" over & over untill you disconnect the call..