IP Telephony Demystified - Chapter 4, IP Telephony Protocols

With a potential 90 percent reduction in phone costs, voice over data networks could offer your business substantial benefits. But how do you know if telephone over IP (Internet Protocol) suits your needs and setup? And if it does, what will it take to make it work? If you want straightforward answers to these questions, you've come to the right place. Lighting the way to IP telephony is Ken Camp's specialty, and in IP Telephony Demystified he offers the best set of tools out there for making basic get-going decisions.

This chapter explores some of the standards being used and developed specifically for IP telephony. It covers H.323, SIP, SDP, Mecago/H.248 and includes a comparison of H.323 and SIP. Further, it provides insight into which protocol is needed, and which is best for your needs.

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