VoIP is also called Voice over Internet Protocol (IP). It simply means sending voice calls over the Internet as opposed to traditional telephone lines. For the user it feels exactly the same as making a conventional call.
Transmitting voice over the Internet is almost equivalent to sending any other data over the Internet. No matter where you or the dialed party are. We have direct connection agreements with other telephony service providers. You therefore receive reduced call rates which in turn save you money on your overall telephony costs.