Has this problem been ongoing since installation, or is this something that has just started to happen.

If you are using the direct transfer to vmail, I am not sure what the problem might be without being onsite to troubleshoot.

The AA may be that the lines are not tied to the vmail ports, and the line is only tied to the Operator phone that has coverage after 2 to 3 rings.

These are only guesses, but this is were I would start looking.

Good Luck,

2wire