All sectors of the industry are gradually migrating to business VoIP from the traditional mode of communication commonly known as public switch telephony network or PSTN. This shift has come over a period of years and is not a recent phenomenon. VoIP dates back to 1895 when it was first introduced. Facing its due of industry apprehensions along the way, it has surpassed the prediction of various researchers who believed initially that voice over IP will never be able to enjoy the status of a front line mode of communication.