Internet telephony refers to routing voice telephone calls over an Internet Protocol, or IP, network. This section explains a little about how Internet telephony works. If all you want to do is learn how to use Internet telephony, you can skip ahead in this chapter to the sections that tell you where to sign up for the service, how much it will cost, and what additional hardware you may need.
Although a private network is involved in some cases, for the most part, phone calls are routed over the Internet. This is achieved using a combination of hardware and software.
Another term for Internet telephony, which I will be using in this chapter, is VoIP, short for Voice over IP.
Although the quality of VoIP may not ...