Internet Telephony Hear it!

Internet Telephony Hacker Definition
Placing telephone calls over the Internet using protocols such as VoIP. Internet telephony is rapidly evolving and has become a serious competitor for conventional telephony with the advent of high-speed Internet access technologies (such as cable and DSL).

Many traditional telephony providers are in the process of switching their internal delivery systems to Internet telephony–based systems in order to provide these services on the same platform as their data services (convergence).

See Also: Voice over Internet Protocol.