What are the IP telephony business benefits? How audio travels across the internet with VoIP In 1995, Intel, Microsoft and Radvision began to standardize VoIP systems. The next year, InSoft released Communique for desktop video conferencing. IP telephony was introduced in 1991 with the creation of the first VoIP application, Speak Freely. Voice features within IP technology - such as voice calls and voicemail - are referred to as voice over IP (VoIP). These digital signals travel through IP networks, such as the internet, as data packets, using IP packet-switched connections. IP telephony works by converting voice calls, faxes and other information into digital signals. Using the internet, calls travel as packets of data on shared lines, avoiding the tolls of PSTN. Traditionally, these communications have been carried over the dedicated circuit-switched connections of the public switched telephone network ( PSTN). IP telephony (Internet Protocol telephony) is a general term for technologies, products and services that use the Internet Protocol's packet-switched connections to support voice calling, voicemail, video calling, video conferencing, faxing and instant messaging (IM).

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