[Asterisk-Users] External Voicemail Access

[Lenwood S Sawyer III]

All,

Can a user dial in from the outside on a DID and then when they hear 
there voicemail greeting press a key (maybe * key) and then be dumped 
into the voicemail menu to check their messages?  It seems that there is 
a way using the "a" extension, but I can not find any detail on it?  Any 
help would be greatly appreciated.

Thanks!
Lenny Sawyer