You would figure that with me having my own exchange that I would have multiple telephone numbers. Quite the opposite. Instead, I will have just one number that would end in 9751. The reason for this is my Ideal Phone Setup, three of my numbers will end in 9751 with the only difference being the exchange. I will seek to have a 412, or 878 area code, so the exchange will be the only difference. With that said, 97xx numbers will be businesses, and employees numbers when it makes sense for an employee to have their own subscriber number. In that case, they will likely get a SIP? line, and will need to use a SIP client to make and receive calls.