There is a specific kind of blindness that affects every business about its own phone system. You cannot hear it. You know the options, you know which one you want, you know that operations handles bookings and that the second option is really for existing customers, and you have never in your life listened past the third option because you have never needed to. So when somebody suggests the menu might be a problem, it does not feel like one, and the conversation ends there. Meanwhile a caller who has never heard any of it is listening to forty seconds of talking, picking the option that sounds closest, waiting, reaching the wrong person, explaining the whole thing again, and quietly deciding something about your business that they will not tell you. The only way through that blindness is to stop looking at the configuration screen, which shows you what you intended, and start ringing your own number from a phone that is not part of your system, at times you would not normally ring, doing the things real callers do. Seven calls covers it. Most people find at least three things they did not know about, and roughly half find a path that rings forever and ends nowhere, which is the single most expensive fault in phone design and the one that never appears in a report. This is the audit, in order, with what each call is designed to expose, followed by the eleven fixes ranked by what they are costing you rather than by how easy they are.