Which technology allows for making telephone calls over the internet?

VoIP, or Voice over Internet Protocol, is the technology that enables telephone calls to be made over the internet. This technology converts voice into digital data packets, which are transmitted over an IP network. VoIP has revolutionized communication by allowing users to make voice calls without the need for traditional phone lines, often resulting in lower costs and greater flexibility.

In contrast, P-ANI is primarily used in conjunction with location tracking for emergency services and does not facilitate voice communication over the internet. TTY (Teletypewriter) is a telecommunications device for the deaf that sends typed messages over the phone lines, and while it does enable communication, it is not related to internet calls. Telematics refers to the integration of telecommunications and monitoring systems, often used in automotive and fleet management, rather than for voice calling purposes. Thus, VoIP stands out as the definitive choice for making telephone calls over the internet.