Unfortunately, when I call my provider to inquire, the technicians have no idea what the auto attendant is. When I do a search on their Web page, nothing comes up for "auto attendant." What else can I do to determine if 3rd-party calling has been used in connection with my account?
When people without VoIP service have calls on their phone bill that they do not understand, they call the support staff at the phone company and point out which calls are questionable or in dispute. It makes the most sense for you to take this approach with the support staff of your VoIP service. You should indicate exactly which calls are in dispute, and ask them why those calls are there. They will then likely be able to research the problem and give you a definitive answer.
This was first published in March 2006