I have a working knowledge of the Triad 3 but I don't feel comfortable enough telling a customer yay or nay on this one. Customer is an elementry school with phones in each classroom, and they want to re-number the extensions to match the room numbers. For example, they want the 100 wing to be 100 through 110 the 200 wing to be 200-210 etc. Is this possible without alot of trouble and are there any number combinations I need to stay away from to avoid system conlficts? They are also using a digital dipatch Voice Mail. Any thought would be appreciated.