If the voice mail/AA answers, when it's called, and you can clearly hear the machine, the problem is not the DNIC cards (Mitel or dialogic).
The voice mail answers with the AA greeting if it does not recognize the extension number that's calling it.
Keep it simple. If you call voice mail, and it doesn't know who you are, it's either the box doesn't match the extension number, or the voice mail isn't receiving the digits properly.
If it's not receiving the digits, the problem would be the COS programing of the DNIC ports in the Mitel.
Work on the simple stuff, then worry about the forwarding, MW, wakeups, etc.
