VoIP is a utility to make phone calls via IP network.
VoIP, abbreviated as Voice over IP, is generally used for any voice communication in the internet. It allows two way communications via the internet. It is cost efficient compared to conventional phone call, as the cost isn’t defined by the geographical distance between the communicators. It is also called as IP telephony or broadband telephony. There isn’t a dedicated path in between the sender and the receiver, and the bandwidth is adjusted according to the call.
The voice message is first transformed from analog to digital and is sent over by the internet. Before reaching the destination, the message is again transformed from digital to analog. The transmission of voice takes place in packets.