Voice over IP

Abstract

Companies in the U.S. spend $100B on long-distance and international telephony every year. Most of that money goes to the basic transit of voice and fax from one location to another. With the continued pervasiveness of intelligent peripheral (IP) networking, a new class of products and services has evolved to move some of that traffic from its traditional home on the public switched telephone network (PSTN) to a variety of packet-switched networks. While many of these new “voice” networks have not previously been considered telephony-class, they are nonetheless attractive because of their low cost.