A. Only answers when no live attendant is available

B. Any NBX user can create an AA for their extension

C. Can answer with or without a live attendant

D. AA message can be recorded via an NBX phone or be an imported .wav or an MPEG-2 file

E. Supports up to 99 AA

F. Can configure different AA based on time of day and day of week

G. Each AA can be configured when to time out and whether to hang up or forward the call