Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies for delivery of voice communications over the internet or other packed switched networks. Other terms frequently encountered and synonymous with VoIP are IP telephony and Internet telephony, as well as voice over broadband, broadband telephony, and broadband phone, when the network connectivity is available over broadband Internet access.
VoIP systems usually interface with the traditional public switched telephone networks (PSTN) to allow for transparent phone communications worldwide.
VoIP can be a benefit for reducing communication and infrastructure costs by routing phone calls over existing data networks and avoiding duplicate network systems.
Voice-over-IP systems carry telephony speech as digital audio, typically reduced in data rate usi ng speech data compression techniques, packetized in small units of typically tens of milliseconds of speech, and encapsulated in a packet stream over IP...=)
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