They add a touch of convenience for customers, clients, suppliers, vendors and others since they need not worry about the cost of the call. Toll-free numbers can be used for any type of call, including voice, data and fax. They work like having long distance services, except the charges are reversed. Callers pay nothing unless they are using wireless services that charge for airtime. But many customers don't know that the new area codes are toll free, so this point must be made more prominently when giving out these numbers.
Options vary from provider to provider.
You may be able to send a certain percentage to one office and the rest to another. Or you might have calls going to different places depending on the time, day or the caller's location. This lets you divide up the labor of answering phones. A 1991 FCC order allows what it called portability . So you don't have to change your stationary and notify all your customers and contacts just because you made a switch.