You have automatic battery backup during power failure. Battery backup must be added at substantial cost. Return to top 3. In fact this is one of the primary benefits of Centrex. Centrex ties together multiple locations within the same central office.
All locations can be on one virtual network.
To see how one school district successfully tied together a number of its schools, go to School District Success Story . When you buy a Centrex system, you lease a portion of a switch located at your local Ameritech facility. When you add extra Centrex lines, our technicians essentially expand the amount of the switch you have leased to accommodate each new line. This involves translation work to build those new numbers into the switch. These charges can be avoided by purchasing more lines than you initially need when you first order Centrex.