How VOIP works
from IT Web
British author Arthur C Clarke famously said that any sufficiently advanced technology is indistinguishable from magic. For many, voice over Internet protocol (VOIP) falls into this magical category. VOIP, also known as voice over IP, broadband phone or Internet phone service, is a technology that allows users to make phone calls without having a regular fixed analogue phone line or using a cellular phone service, since it happens over an Internet connection.
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