(Voice over Internet Protocol) - A category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls. Voice data is sent in packets using rather than by traditional POTS circuits.One advantage of VoIP is that the telephone calls over the Internet do not incur a surcharge beyond what the user is paying for Internet access, much in the same way that the user doesn't pay for sending individual e-mails over the Internet.
Applied IP helps small and medium businesses install Voice over Internet Protocol networks for voice applications such as telephony, voice instant messaging, and teleconferencing.
A well-conceived VoIP network allows customers to simplify their networks and improve IP telephony. Combining data, voice, and video on a single secure network, Cisco provides easy-to-use technology and applications to help you minimize complexity, increase efficiency, and adapt quickly.

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