Switching to VoIP
More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their internal local and wide-area network infrastructure to replace legacy enterprise telephone networks. This migration to a single network carrying voice and data is called convergence, and it's revolutionizing the world of telecommunications by slashing costs and empowering users. The technology of families driving this convergence is called...
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Once the battered old soldier of the technological revolution, the global telephone network, over a century old, is fading away. In the next decade or so, about two-thirds of the 230 million land lines in the US will be replaced by the Voice over Internet Protocol (VoIP), giving network managers one more thing to worry about. Wallingford explains how voices become data, how Linux became a PBX, and how to replace the voice circuit with VoIP without losing either your voice or your mind. He explains how to maintain quality of service and security, how to use troubleshooting tools and PSTN trunks, the secrets of VoIP network infrastructure, and whom to call for hardware and software. Wallingford even supplies an Asterisk reference and its Manager socket API syntax, along with SIP methods and responses and AGI commands. Annotation ©2005 Book News, Inc., Portland, OR
1Voice and data : two separate worlds?12Voice over data : many conversations, one network123Linux as a PBX344Circuit-switched telephone595Enterprise telephony applications946Replacing the voice circuit with VoIP1107Replacing call signaling with VoIP1308VoIP readiness1659Quality of service18710Security and monitoring22011Troubleshooting tools24612PSTN trunks26513Network infrastructure for VoIP29014Traditional apps on the converged network33015What can go wrong?35816VoIP vendors and services37017Asterisk reference382ASIP methods and responses435BAGI commands439CAsterisk manager socket API syntax443
