Voice Over IP (VoIP)
Internet telephony is now quite common in many areas. TCP/IP phone service is often less expensive, and more versatile, than conventional phone service. In many ways, Internet phone calls are just another form of streaming audio, so it should be no surprise that RTP is the most popular protocol for transmitting voice over IP (VoIP) communications. But the act of talking is only one piece of the puzzle. The business of finding a user, placing a call, setting up a session, and gracefully ending the session requires new tools and protocols.
If you expect your IP phone service to connect with the conventional phone network, you also face the problem of providing a control system that is compatible (or at least interfacable) with ...
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